From e27979a2dd6e8025e2232fbe9b7c28a6ca12e45c Mon Sep 17 00:00:00 2001
From: andrii-pukhalevych <a.puhalevich@gmail.com>
Date: Thu, 21 May 2020 16:46:29 +0300
Subject: [PATCH 1/4] code refactor

use strict checks, use single quotes and fix typos
---
 .../sample-plugin/slm-sample-plugin.php       | 20 +++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/software-license-manager/client-side-examples/sample-plugin/slm-sample-plugin.php b/software-license-manager/client-side-examples/sample-plugin/slm-sample-plugin.php
index e92524d..fd18841 100644
--- a/software-license-manager/client-side-examples/sample-plugin/slm-sample-plugin.php
+++ b/software-license-manager/client-side-examples/sample-plugin/slm-sample-plugin.php
@@ -47,7 +47,7 @@ function sample_license_management_page() {
 
         // Check for error in the response
         if (is_wp_error($response)){
-            echo "Unexpected Error! The query returned with an error.";
+            echo 'Unexpected Error! The query returned with an error.';
         }
 
         //var_dump($response);//uncomment it if you want to look at the full response
@@ -58,9 +58,9 @@ function sample_license_management_page() {
         // TODO - Do something with it.
         //var_dump($license_data);//uncomment it to look at the data
         
-        if($license_data->result == 'success'){//Success was returned for the license activation
+        if('success' === $license_data->result){//Success was returned for the license activation
             
-            //Uncomment the followng line to see the message that returned from the license server
+            //Uncomment the following line to see the message that returned from the license server
             echo '<br />The following message was returned from the server: '.$license_data->message;
             
             //Save the license key in the options table
@@ -69,7 +69,7 @@ function sample_license_management_page() {
         else{
             //Show error to the user. Probably entered incorrect license key.
             
-            //Uncomment the followng line to see the message that returned from the license server
+            //Uncomment the following line to see the message that returned from the license server
             echo '<br />The following message was returned from the server: '.$license_data->message;
         }
 
@@ -95,7 +95,7 @@ function sample_license_management_page() {
 
         // Check for error in the response
         if (is_wp_error($response)){
-            echo "Unexpected Error! The query returned with an error.";
+            echo 'Unexpected Error! The query returned with an error.';
         }
 
         //var_dump($response);//uncomment it if you want to look at the full response
@@ -106,18 +106,18 @@ function sample_license_management_page() {
         // TODO - Do something with it.
         //var_dump($license_data);//uncomment it to look at the data
         
-        if($license_data->result == 'success'){//Success was returned for the license activation
+        if('success' === $license_data->result){//Success was returned for the license activation
             
-            //Uncomment the followng line to see the message that returned from the license server
+            //Uncomment the following line to see the message that returned from the license server
             echo '<br />The following message was returned from the server: '.$license_data->message;
             
-            //Remove the licensse key from the options table. It will need to be activated again.
+            //Remove the license key from the options table. It will need to be activated again.
             update_option('sample_license_key', '');
         }
         else{
             //Show error to the user. Probably entered incorrect license key.
             
-            //Uncomment the followng line to see the message that returned from the license server
+            //Uncomment the following line to see the message that returned from the license server
             echo '<br />The following message was returned from the server: '.$license_data->message;
         }
         
@@ -141,4 +141,4 @@ function sample_license_management_page() {
     <?php
     
     echo '</div>';
-}
\ No newline at end of file
+}

From f3304ae50f6689986a6c29a10191a3bac45a90fe Mon Sep 17 00:00:00 2001
From: andrii-pukhalevych <a.puhalevich@gmail.com>
Date: Thu, 21 May 2020 17:11:47 +0300
Subject: [PATCH 2/4] strict type checks and basic code refactor

---
 .../sample-plugin/slm-sample-plugin.php       | 14 ++++----
 .../includes/slm-api-listener.php             | 26 +++++++-------
 .../includes/slm-debug-logger.php             | 15 ++++----
 .../includes/slm-init-time-tasks.php          |  8 ++---
 .../includes/slm-third-party-integration.php  |  6 ++--
 .../includes/slm-utility.php                  |  6 ++--
 .../js/wplm-custom-admin.js                   |  6 ++--
 .../menu/includes/slm-list-table-class.php    | 22 ++++++------
 .../menu/slm-add-licenses.php                 | 30 ++++++++--------
 .../menu/slm-admin-functions.php              |  6 ++--
 .../menu/slm-lic-settings.php                 |  2 +-
 .../menu/slm-list-licenses-class.php          | 35 ++++++++-----------
 software-license-manager/slm_bootstrap.php    |  6 ++--
 software-license-manager/slm_installer.php    |  8 ++---
 14 files changed, 91 insertions(+), 99 deletions(-)

diff --git a/software-license-manager/client-side-examples/sample-plugin/slm-sample-plugin.php b/software-license-manager/client-side-examples/sample-plugin/slm-sample-plugin.php
index fd18841..15a1db0 100644
--- a/software-license-manager/client-side-examples/sample-plugin/slm-sample-plugin.php
+++ b/software-license-manager/client-side-examples/sample-plugin/slm-sample-plugin.php
@@ -46,7 +46,7 @@ function sample_license_management_page() {
         $response = wp_remote_get($query, array('timeout' => 20, 'sslverify' => false));
 
         // Check for error in the response
-        if (is_wp_error($response)){
+        if (is_wp_error($response)) {
             echo 'Unexpected Error! The query returned with an error.';
         }
 
@@ -58,15 +58,14 @@ function sample_license_management_page() {
         // TODO - Do something with it.
         //var_dump($license_data);//uncomment it to look at the data
         
-        if('success' === $license_data->result){//Success was returned for the license activation
+        if ('success' === $license_data->result) {//Success was returned for the license activation
             
             //Uncomment the following line to see the message that returned from the license server
             echo '<br />The following message was returned from the server: '.$license_data->message;
             
             //Save the license key in the options table
             update_option('sample_license_key', $license_key); 
-        }
-        else{
+        } else {
             //Show error to the user. Probably entered incorrect license key.
             
             //Uncomment the following line to see the message that returned from the license server
@@ -94,7 +93,7 @@ function sample_license_management_page() {
         $response = wp_remote_get($query, array('timeout' => 20, 'sslverify' => false));
 
         // Check for error in the response
-        if (is_wp_error($response)){
+        if (is_wp_error($response)) {
             echo 'Unexpected Error! The query returned with an error.';
         }
 
@@ -106,15 +105,14 @@ function sample_license_management_page() {
         // TODO - Do something with it.
         //var_dump($license_data);//uncomment it to look at the data
         
-        if('success' === $license_data->result){//Success was returned for the license activation
+        if ('success' === $license_data->result) {//Success was returned for the license activation
             
             //Uncomment the following line to see the message that returned from the license server
             echo '<br />The following message was returned from the server: '.$license_data->message;
             
             //Remove the license key from the options table. It will need to be activated again.
             update_option('sample_license_key', '');
-        }
-        else{
+        } else {
             //Show error to the user. Probably entered incorrect license key.
             
             //Uncomment the following line to see the message that returned from the license server
diff --git a/software-license-manager/includes/slm-api-listener.php b/software-license-manager/includes/slm-api-listener.php
index 87dd098..b6dc195 100644
--- a/software-license-manager/includes/slm-api-listener.php
+++ b/software-license-manager/includes/slm-api-listener.php
@@ -27,7 +27,7 @@ function __construct() {
     }
 
     function creation_api_listener() {
-        if (isset($_REQUEST['slm_action']) && trim($_REQUEST['slm_action']) == 'slm_create_new') {
+        if (isset($_REQUEST['slm_action']) && trim($_REQUEST['slm_action']) === 'slm_create_new') {
             //Handle the licene creation API query
             global $slm_debug_logger;
 
@@ -42,9 +42,9 @@ function creation_api_listener() {
             do_action('slm_api_listener_slm_create_new');            
 
             $fields = array();
-            if (isset($_REQUEST['license_key']) && !empty($_REQUEST['license_key'])){
+            if (isset($_REQUEST['license_key']) && !empty($_REQUEST['license_key'])) {
                 $fields['license_key'] = strip_tags($_REQUEST['license_key']);//Use the key you pass via the request
-            }else{
+            } else {
                 $fields['license_key'] = uniqid($lic_key_prefix);//Use random generated key
             }
             $fields['lic_status'] = isset( $_REQUEST['lic_status'] ) ? wp_unslash( strip_tags( $_REQUEST['lic_status'] ) ) : 'pending';
@@ -85,7 +85,7 @@ function creation_api_listener() {
      */
 
     function activation_api_listener() {
-        if (isset($_REQUEST['slm_action']) && trim($_REQUEST['slm_action']) == 'slm_activate') {
+        if (isset($_REQUEST['slm_action']) && trim($_REQUEST['slm_action']) === 'slm_activate') {
             //Handle the license activation API query
             global $slm_debug_logger;
 
@@ -112,22 +112,22 @@ function activation_api_listener() {
             $sql_prep2 = $wpdb->prepare("SELECT * FROM $reg_table WHERE lic_key = %s", $key);
             $reg_domains = $wpdb->get_results($sql_prep2, OBJECT);
             if ($retLic) {
-                if ($retLic->lic_status == 'blocked') {
+                if ('blocked' === $retLic->lic_status) {
                     $args = (array('result' => 'error', 'message' => 'Your License key is blocked', 'error_code' => SLM_Error_Codes::LICENSE_BLOCKED));
                     SLM_API_Utility::output_api_response($args);
-                } elseif ($retLic->lic_status == 'expired') {
+                } elseif ('expired' === $retLic->lic_status) {
                     $args = (array('result' => 'error', 'message' => 'Your License key has expired', 'error_code' => SLM_Error_Codes::LICENSE_EXPIRED));
                     SLM_API_Utility::output_api_response($args);
                 }
 
                 if (count($reg_domains) < floor($retLic->max_allowed_domains)) {
                     foreach ($reg_domains as $reg_domain) {
-                        if (isset($_REQUEST['migrate_from']) && (trim($_REQUEST['migrate_from']) == $reg_domain->registered_domain)) {
+                        if (isset($_REQUEST['migrate_from']) && (trim($_REQUEST['migrate_from']) === $reg_domain->registered_domain)) {
                             $wpdb->update($reg_table, array('registered_domain' => $fields['registered_domain']), array('registered_domain' => trim(strip_tags($_REQUEST['migrate_from']))));
                             $args = (array('result' => 'success', 'message' => 'Registered domain has been updated'));
                             SLM_API_Utility::output_api_response($args);
                         }
-                        if ($fields['registered_domain'] == $reg_domain->registered_domain) {
+                        if ($fields['registered_domain'] === $reg_domain->registered_domain) {
                             $args = (array('result' => 'error', 'message' => 'License key already in use on ' . $reg_domain->registered_domain, 'error_code' => SLM_Error_Codes::LICENSE_IN_USE));
                             SLM_API_Utility::output_api_response($args);
                         }
@@ -146,7 +146,7 @@ function activation_api_listener() {
 
                     //Lets loop through the domains to see if it is being used on an existing domain or not.
                     foreach ($reg_domains as $reg_domain) {
-                        if ($fields['registered_domain'] == $reg_domain->registered_domain) {
+                        if ($fields['registered_domain'] === $reg_domain->registered_domain) {
                             //Not used on an existing domain. Return error: LICENSE_IN_USE_ON_DOMAIN_AND_MAX_REACHED
                             $args = (array('result' => 'error', 'message' => 'Reached maximum activation. License key already in use on ' . $reg_domain->registered_domain, 'error_code' => SLM_Error_Codes::LICENSE_IN_USE_ON_DOMAIN_AND_MAX_REACHED));
                             SLM_API_Utility::output_api_response($args);
@@ -165,7 +165,7 @@ function activation_api_listener() {
     }
 
     function deactivation_api_listener() {
-        if (isset($_REQUEST['slm_action']) && trim($_REQUEST['slm_action']) == 'slm_deactivate') {
+        if (isset($_REQUEST['slm_action']) && trim($_REQUEST['slm_action']) === 'slm_deactivate') {
             //Handle the license deactivation API query
             global $slm_debug_logger;
 
@@ -188,9 +188,9 @@ function deactivation_api_listener() {
             $registered_dom_table = SLM_TBL_LIC_DOMAIN;
             $sql_prep = $wpdb->prepare("DELETE FROM $registered_dom_table WHERE lic_key=%s AND registered_domain=%s", $license_key, $registered_domain);
             $delete = $wpdb->query($sql_prep);
-            if ($delete === false) {
+            if (false === $delete) {
                 $slm_debug_logger->log_debug("Error - failed to delete the registered domain from the database.");
-            } else if ($delete == 0) {
+            } else if (0 == $delete) {
                 $args = (array('result' => 'error', 'message' => 'The license key on this domain is already inactive', 'error_code' => SLM_Error_Codes::DOMAIN_ALREADY_INACTIVE));
                 SLM_API_Utility::output_api_response($args);
             } else {
@@ -201,7 +201,7 @@ function deactivation_api_listener() {
     }
 
     function check_api_listener() {
-        if (isset($_REQUEST['slm_action']) && trim($_REQUEST['slm_action']) == 'slm_check') {
+        if (isset($_REQUEST['slm_action']) && trim($_REQUEST['slm_action']) === 'slm_check') {
             //Handle the license check API query
             global $slm_debug_logger;
 
diff --git a/software-license-manager/includes/slm-debug-logger.php b/software-license-manager/includes/slm-debug-logger.php
index f0ab6ae..2d5c160 100644
--- a/software-license-manager/includes/slm-debug-logger.php
+++ b/software-license-manager/includes/slm-debug-logger.php
@@ -26,7 +26,7 @@ function __construct()
         $this->log_folder_path = WP_LICENSE_MANAGER_PATH . '/logs';
         //Check config and if debug is enabled then set the enabled flag to true
         $options = get_option('slm_plugin_options');
-        if(!empty($options['enable_debug'])){//Debugging is enabled
+        if (!empty($options['enable_debug'])) {//Debugging is enabled
             $this->debug_enabled = true;            
         }
     }
@@ -39,10 +39,9 @@ function get_debug_timestamp()
     function get_debug_status($level)
     {
         $size = count($this->debug_status);
-        if($level >= $size){
+        if ($level >= $size) {
             return 'UNKNOWN';
-        }
-        else{
+        } else {
             return $this->debug_status[$level];
         }
     }
@@ -57,7 +56,7 @@ function get_section_break($section_break)
     
     function reset_log_file($file_name='')
     {
-        if(empty($file_name)){
+        if (empty($file_name)) {
             $file_name = $this->default_log_file;
         }
         $debug_log_file = $this->log_folder_path.'/'.$file_name;
@@ -69,9 +68,9 @@ function reset_log_file($file_name='')
     
     function append_to_file($content,$file_name)
     {
-        if(empty($file_name))$file_name = $this->default_log_file;
+        if (empty($file_name))$file_name = $this->default_log_file;
         $debug_log_file = $this->log_folder_path.'/'.$file_name;
-        $fp=fopen($debug_log_file,'a');
+        $fp=fopen($debug_log_file, 'a');
         fwrite($fp, $content);
         fclose($fp);
     }
@@ -102,7 +101,7 @@ function log_debug_cron($message,$level=0,$section_break=false)
     static function log_debug_st($message,$level=0,$section_break=false,$file_name='')
     {
         $options = get_option('slm_plugin_options');
-        if(empty($options['enable_debug'])){//Debugging is disabled
+        if (empty($options['enable_debug'])) {//Debugging is disabled
            return;
         }
         $content = '['.date('m/d/Y g:i A').'] - STATUS : '. $message . "\n";
diff --git a/software-license-manager/includes/slm-init-time-tasks.php b/software-license-manager/includes/slm-init-time-tasks.php
index be2667d..928f094 100644
--- a/software-license-manager/includes/slm-init-time-tasks.php
+++ b/software-license-manager/includes/slm-init-time-tasks.php
@@ -2,7 +2,7 @@
 
 class SLM_Init_Time_Tasks{
     
-    function __construct(){
+    function __construct() {
         $this->load_scripts();
         
         //Add other init time operations here        
@@ -15,12 +15,12 @@ function load_scripts()
         wp_enqueue_script('jquery');
 
         //Load all admin side scripts and styles only
-        if(is_admin())
+        if (is_admin())
         {
             wp_enqueue_script('jquery-ui-datepicker');
             wp_enqueue_script('wplm-custom-admin-js', WP_LICENSE_MANAGER_URL . '/js/wplm-custom-admin.js', array( 'jquery-ui-dialog' ));//admin only custom js code
             
-            if (isset($_GET['page']) && $_GET['page'] == 'wp_lic_mgr_addedit') {//Only include if we are in the license add/edit interface
+            if (isset($_GET['page']) && 'wp_lic_mgr_addedit' === $_GET['page']) {//Only include if we are in the license add/edit interface
                 wp_enqueue_style('jquery-ui-style', WP_LICENSE_MANAGER_URL .'/css/jquery-ui.css');
             }
             //wp_enqueue_style('dialogStylesheet', includes_url().'css/jquery-ui-dialog.css');            
@@ -33,7 +33,7 @@ function slm_daily_cron_event_handler()
         
         do_action('slm_daily_cron_event_triggered');
         
-        if ( isset($options['enable_auto_key_expiry']) && $options['enable_auto_key_expiry'] == '1'){
+        if ( isset($options['enable_auto_key_expiry']) && '1' == $options['enable_auto_key_expiry']) {
             //Do the auto key expiry task
             SLM_Debug_Logger::log_debug_st("SLM daily cronjob - auto expiry of license key is enabled.");
             SLM_Utility::do_auto_key_expiry();
diff --git a/software-license-manager/includes/slm-third-party-integration.php b/software-license-manager/includes/slm-third-party-integration.php
index 367a890..d18e0e8 100644
--- a/software-license-manager/includes/slm-third-party-integration.php
+++ b/software-license-manager/includes/slm-third-party-integration.php
@@ -15,7 +15,7 @@ function slm_handle_estore_email_body_filter($body, $payment_data, $cart_items)
     //Check if this is a recurring payment.
     if ( function_exists('is_paypal_recurring_payment') ) {
         $recurring_payment = is_paypal_recurring_payment($payment_data);
-        if( $recurring_payment ){
+        if ( $recurring_payment ) {
             $slm_debug_logger->log_debug("This is a recurring payment. No need to create a new license key.");
             do_action('slm_estore_recurring_payment_received', $payment_data, $cart_items);
             return $body;
@@ -26,7 +26,7 @@ function slm_handle_estore_email_body_filter($body, $payment_data, $cart_items)
         $prod_id = $current_cart_item['item_number'];
         $item_name = $current_cart_item['item_name'];
         $quantity = $current_cart_item['quantity'];
-        if(empty($quantity)){
+        if (empty($quantity)) {
             $quantity = 1;
         }
         $slm_debug_logger->log_debug('License Manager - Item Number: ' . $prod_id . ', Quantity: ' . $quantity . ', Item Name: ' . $item_name);
@@ -52,7 +52,7 @@ function slm_handle_estore_email_body_filter($body, $payment_data, $cart_items)
     return $body;
 }
 
-function slm_estore_check_and_create_key_for_qty($retrieved_product, $payment_data, $cart_items, $item_name, $quantity){
+function slm_estore_check_and_create_key_for_qty($retrieved_product, $payment_data, $cart_items, $item_name, $quantity) {
     $prod_key_data = "";
     for ($i = 0; $i < $quantity; $i++) {
         $prod_key_data .= slm_estore_check_and_generate_key($retrieved_product, $payment_data, $cart_items, $item_name);
diff --git a/software-license-manager/includes/slm-utility.php b/software-license-manager/includes/slm-utility.php
index 2fdb8f5..2ab3c2f 100644
--- a/software-license-manager/includes/slm-utility.php
+++ b/software-license-manager/includes/slm-utility.php
@@ -12,15 +12,15 @@ static function do_auto_key_expiry() {
         
         $sql_prep = $wpdb->prepare("SELECT * FROM $tbl_name WHERE lic_status !=%s", 'expired');//Load the non-expired keys
         $licenses = $wpdb->get_results($sql_prep, OBJECT);
-        if(!$licenses){
+        if (!$licenses) {
             SLM_Debug_Logger::log_debug_st("do_auto_key_expiry() - no license keys found.");
             return false;
         }
 
-        foreach($licenses as $license){
+        foreach ($licenses as $license) {
             $key = $license->license_key;
             $expiry_date = $license->date_expiry;
-            if ($expiry_date == '0000-00-00'){
+            if ('0000-00-00' === $expiry_date) {
                 SLM_Debug_Logger::log_debug_st("This key (".$key.") doesn't have a valid expiry date set. The expiry of this key will not be checked.");
                 continue;
             }
diff --git a/software-license-manager/js/wplm-custom-admin.js b/software-license-manager/js/wplm-custom-admin.js
index fb6639a..abdff10 100644
--- a/software-license-manager/js/wplm-custom-admin.js
+++ b/software-license-manager/js/wplm-custom-admin.js
@@ -1,7 +1,7 @@
-jQuery(document).ready(function($){
+jQuery(function(){
     //Add date picker listener on date fields
-    if ($.fn.datepicker){
-            $('.wplm_pick_date').datepicker({
+    if (jQuery.fn.datepicker) {
+        jQuery('.wplm_pick_date').datepicker({
             dateFormat : 'yy-mm-dd'
         });
     }
diff --git a/software-license-manager/menu/includes/slm-list-table-class.php b/software-license-manager/menu/includes/slm-list-table-class.php
index 82e9df9..6e11922 100644
--- a/software-license-manager/menu/includes/slm-list-table-class.php
+++ b/software-license-manager/menu/includes/slm-list-table-class.php
@@ -149,7 +149,7 @@ function set_pagination_args( $args ) {
 	 * @return array
 	 */
 	function get_pagination_arg( $key ) {
-		if ( 'page' == $key )
+		if ( 'page' === $key )
 			return $this->get_pagenum();
 
 		if ( isset( $this->_pagination_args[$key] ) )
@@ -281,7 +281,7 @@ function bulk_actions() {
 		echo "<option value='-1' selected='selected'>" . __( 'Bulk Actions' ) . "</option>\n";
 
 		foreach ( $this->_actions as $name => $title ) {
-			$class = 'edit' == $name ? ' class="hide-if-no-js"' : '';
+			$class = 'edit' === $name ? ' class="hide-if-no-js"' : '';
 
 			echo "\t<option value='$name'$class>$title</option>\n";
 		}
@@ -400,7 +400,7 @@ function view_switcher( $current_mode ) {
 		<div class="view-switch">
 <?php
 			foreach ( $modes as $mode => $title ) {
-				$class = ( $current_mode == $mode ) ? 'class="current"' : '';
+				$class = ( $current_mode === $mode ) ? 'class="current"' : '';
 				echo "<a href='" . esc_url( add_query_arg( 'mode', $mode, $_SERVER['REQUEST_URI'] ) ) . "' $class><img id='view-switch-$mode' src='" . esc_url( includes_url( 'images/blank.gif' ) ) . "' width='20' height='20' title='$title' alt='$title' /></a>\n";
 			}
 		?>
@@ -440,7 +440,7 @@ function comments_bubble( $post_id, $pending_comments ) {
 	function get_pagenum() {
 		$pagenum = isset( $_REQUEST['paged'] ) ? absint( $_REQUEST['paged'] ) : 0;
 
-		if( isset( $this->_pagination_args['total_pages'] ) && $pagenum > $this->_pagination_args['total_pages'] )
+		if ( isset( $this->_pagination_args['total_pages'] ) && $pagenum > $this->_pagination_args['total_pages'] )
 			$pagenum = $this->_pagination_args['total_pages'];
 
 		return max( 1, $pagenum );
@@ -504,7 +504,7 @@ function pagination( $which ) {
 			'&lsaquo;'
 		);
 
-		if ( 'bottom' == $which )
+		if ( 'bottom' === $which )
 			$html_current_page = $current;
 		else
 			$html_current_page = sprintf( "<input class='current-page' title='%s' type='text' name='paged' value='%s' size='%d' />",
@@ -643,7 +643,7 @@ function print_column_headers( $with_id = true ) {
 		else
 			$current_orderby = '';
 
-		if ( isset( $_GET['order'] ) && 'desc' == $_GET['order'] )
+		if ( isset( $_GET['order'] ) && 'desc' === $_GET['order'] )
 			$current_order = 'desc';
 		else
 			$current_order = 'asc';
@@ -664,7 +664,7 @@ function print_column_headers( $with_id = true ) {
 
 			$style = ' style="' . $style . '"';
 
-			if ( 'cb' == $column_key )
+			if ( 'cb' === $column_key )
 				$class[] = 'check-column';
 			elseif ( in_array( $column_key, array( 'posts', 'comments', 'links' ) ) )
 				$class[] = 'num';
@@ -672,8 +672,8 @@ function print_column_headers( $with_id = true ) {
 			if ( isset( $sortable[$column_key] ) ) {
 				list( $orderby, $desc_first ) = $sortable[$column_key];
 
-				if ( $current_orderby == $orderby ) {
-					$order = 'asc' == $current_order ? 'desc' : 'asc';
+				if ( $current_orderby === $orderby ) {
+					$order = 'asc' === $current_order ? 'desc' : 'asc';
 					$class[] = 'sorted';
 					$class[] = $current_order;
 				} else {
@@ -746,7 +746,7 @@ function get_table_classes() {
 	 * @access protected
 	 */
 	function display_tablenav( $which ) {
-		if ( 'top' == $which )
+		if ( 'top' === $which )
 			wp_nonce_field( 'bulk-' . $this->_args['plural'] );
 ?>
 	<div class="tablenav <?php echo esc_attr( $which ); ?>">
@@ -837,7 +837,7 @@ function single_row_columns( $item ) {
 
 			$attributes = "$class$style";
 
-			if ( 'cb' == $column_name ) {
+			if ( 'cb' === $column_name ) {
 				echo '<th scope="row" class="check-column">';
 				echo $this->column_cb( $item );
 				echo '</th>';
diff --git a/software-license-manager/menu/slm-add-licenses.php b/software-license-manager/menu/slm-add-licenses.php
index d98801c..108d9e6 100644
--- a/software-license-manager/menu/slm-add-licenses.php
+++ b/software-license-manager/menu/slm-add-licenses.php
@@ -54,7 +54,7 @@ function wp_lic_mgr_add_licenses_menu() {
     if (isset($_POST['save_record'])) {
 
         //Check nonce
-        if ( !isset($_POST['slm_add_edit_nonce_val']) || !wp_verify_nonce($_POST['slm_add_edit_nonce_val'], 'slm_add_edit_nonce_action' )){
+        if ( !isset($_POST['slm_add_edit_nonce_val']) || !wp_verify_nonce($_POST['slm_add_edit_nonce_val'], 'slm_add_edit_nonce_action' )) {
             //Nonce check failed.
             wp_die("Error! Nonce verification failed for license save action.");
         }
@@ -77,13 +77,13 @@ function wp_lic_mgr_add_licenses_menu() {
         $product_ref = $_POST['product_ref'];
         $subscr_id = $_POST['subscr_id'];
 
-        if(empty($created_date)){
+        if (empty($created_date)) {
             $created_date = $current_date;
         }
-        if(empty($renewed_date)){
+        if (empty($renewed_date)) {
             $renewed_date = $current_date;
         }
-        if(empty($expiry_date)){
+        if (empty($expiry_date)) {
             $expiry_date = $current_date_plus_1year;
         }
 
@@ -109,24 +109,24 @@ function wp_lic_mgr_add_licenses_menu() {
         if (empty($id)) {//Insert into database
             $result = $wpdb->insert( $lk_table, $fields);
             $id = $wpdb->insert_id;
-            if($result === false){
+            if ($result === false) {
                 $errors .= __('Record could not be inserted into the database!', 'slm');
             }
         } else { //Update record
             $where = array('id'=>$id);
             $updated = $wpdb->update($lk_table, $fields, $where);
-            if($updated === false){
+            if (false === $updated) {
                 //TODO - log error
                 $errors .= __('Update of the license key table failed!', 'slm');
             }
         }
 
-        if(empty($errors)){
+        if (empty($errors)) {
             $message = "Record successfully saved!";
             echo '<div id="message" class="updated fade"><p>';
             echo $message;
             echo '</p></div>';
-        }else{
+        } else {
             echo '<div id="message" class="error">' . $errors . '</div>';
         }
 
@@ -199,7 +199,7 @@ function wp_lic_mgr_add_licenses_menu() {
                     if ($id != '') {
                         echo '<input name="edit_record" type="hidden" value="' . $id . '" />';
                     } else {
-                        if(!isset($editing_record)){//Create an empty object
+                        if (!isset($editing_record)) {//Create an empty object
                             $editing_record = new stdClass();
                         }
                         //Auto generate unique key
@@ -227,10 +227,10 @@ function wp_lic_mgr_add_licenses_menu() {
                         <th scope="row">License Status</th>
                         <td>
                             <select name="lic_status">
-                                <option value="pending" <?php if ($license_status == 'pending') echo 'selected="selected"'; ?> >Pending</option>
-                                <option value="active" <?php if ($license_status == 'active') echo 'selected="selected"'; ?> >Active</option>
-                                <option value="blocked" <?php if ($license_status == 'blocked') echo 'selected="selected"'; ?> >Blocked</option>
-                                <option value="expired" <?php if ($license_status == 'expired') echo 'selected="selected"'; ?> >Expired</option>
+                                <option value="pending" <?php if ('pending' === $license_status) echo 'selected="selected"'; ?> >Pending</option>
+                                <option value="active" <?php if ('active' === $license_status) echo 'selected="selected"'; ?> >Active</option>
+                                <option value="blocked" <?php if ('blocked' === $license_status) echo 'selected="selected"'; ?> >Blocked</option>
+                                <option value="expired" <?php if ('expired' === $license_status) echo 'selected="selected"'; ?> >Expired</option>
                             </select>
                         </td></tr>
 
@@ -337,7 +337,7 @@ function wp_lic_mgr_add_licenses_menu() {
                 <?php
                 $data = array('row_id' => $id, 'key' => $license_key);
                 $extra_output = apply_filters('slm_add_edit_interface_above_submit','', $data);
-                if(!empty($extra_output)){
+                if (!empty($extra_output)) {
                     echo $extra_output;
                 }
                 ?>
@@ -374,7 +374,7 @@ function wp_lic_mgr_add_licenses_menu() {
 			$.get(
 				'<?php echo esc_html( admin_url( 'admin-ajax.php' ) ); ?>' + '?action=del_reistered_domain&id=' + id,
 				function( data ) {
-					if ( 'success' == data ) {
+					if ( 'success' === data ) {
 						$msg.addClass( 'success' ).html( 'Deleted' );
 
 						var $tr = $link.parents( 'tr:first' );
diff --git a/software-license-manager/menu/slm-admin-functions.php b/software-license-manager/menu/slm-admin-functions.php
index 187722f..cfeb433 100644
--- a/software-license-manager/menu/slm-admin-functions.php
+++ b/software-license-manager/menu/slm-admin-functions.php
@@ -20,9 +20,9 @@ function wp_lic_mgr_admin_fnc_menu() {
         curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
         $returnValue = curl_exec($ch);
 
-        $msg = "";
-        if ($returnValue == "Success") {
-            $msg .= "Success message returned from the remote host.";
+        $msg = '';
+        if ('Success' === $returnValue) {
+            $msg .= 'Success message returned from the remote host.';
         }
         echo '<div id="message" class="updated fade"><p>';
         echo 'Request sent to the specified URL!';
diff --git a/software-license-manager/menu/slm-lic-settings.php b/software-license-manager/menu/slm-lic-settings.php
index 79b294c..05fb007 100644
--- a/software-license-manager/menu/slm-lic-settings.php
+++ b/software-license-manager/menu/slm-lic-settings.php
@@ -14,7 +14,7 @@ function wp_lic_mgr_settings_menu() {
 
 function wp_lic_mgr_general_settings() {
 
-    if (isset($_REQUEST['slm_reset_log'])){
+    if (isset($_REQUEST['slm_reset_log'])) {
         //$slm_logger = new SLM_Debug_Logger();
         global $slm_debug_logger;
         $slm_debug_logger->reset_log_file("log.txt");
diff --git a/software-license-manager/menu/slm-list-licenses-class.php b/software-license-manager/menu/slm-list-licenses-class.php
index 9f06e53..969d58f 100644
--- a/software-license-manager/menu/slm-list-licenses-class.php
+++ b/software-license-manager/menu/slm-list-licenses-class.php
@@ -6,7 +6,7 @@
 
 class WPLM_List_Licenses extends WP_List_Table {
 
-    function __construct(){
+    function __construct() {
         global $status, $page;
 
         //Set parent defaults
@@ -18,11 +18,11 @@ function __construct(){
 
     }
 
-    function column_default($item, $column_name){
-    	return $item[$column_name];
+    function column_default($item, $column_name) {
+        return $item[$column_name];
     }
 
-    function column_id($item){
+    function column_id($item) {
         $row_id = $item['id'];
         $actions = array(
             'edit' => sprintf('<a href="admin.php?page=wp_lic_mgr_addedit&edit_record=%s">Edit</a>', $row_id),
@@ -35,7 +35,7 @@ function column_id($item){
     }
 
 
-    function column_cb($item){
+    function column_cb($item) {
         return sprintf(
             '<input type="checkbox" name="%1$s[]" value="%2$s" />',
             /*$1%s*/ $this->_args['singular'],  //Let's simply repurpose the table's singular label
@@ -43,12 +43,8 @@ function column_cb($item){
        );
     }
 
-    function column_active($item){
-        if ($item['active'] == 1){
-            return 'active';
-        } else{
-            return 'inactive';
-        }
+    function column_active($item) {
+        return 1 == $item['active'] ? 'active' : 'inactive';
     }
 
 	function get_columns() {
@@ -87,20 +83,19 @@ function get_bulk_actions() {
     }
 
     function process_bulk_action() {
-        if('delete'===$this->current_action())
-        {
+        if ('delete'===$this->current_action()) {
             //Process delete bulk actions
-            if(!isset($_REQUEST['item'])){
+            if (!isset($_REQUEST['item'])) {
                 $error_msg = '<p>'.__('Error - Please select some records using the checkboxes', 'slm').'</p>';
                 echo '<div id="message" class="error fade">'.$error_msg.'</div>';
                 return;
-            }else {
-        	$nvp_key = $this->_args['singular'];
-        	$records_to_delete = $_GET[$nvp_key];
-        	foreach ($records_to_delete as $row){
+            } else {
+                $nvp_key = $this->_args['singular'];
+                $records_to_delete = $_GET[$nvp_key];
+                foreach ($records_to_delete as $row) {
                     SLM_Utility::delete_license_key_by_row_id($row);
-        	}
-        	echo '<div id="message" class="updated fade"><p>Selected records deleted successfully!</p></div>';
+                }
+                echo '<div id="message" class="updated fade"><p>Selected records deleted successfully!</p></div>';
             }
         }
     }
diff --git a/software-license-manager/slm_bootstrap.php b/software-license-manager/slm_bootstrap.php
index a59c51a..072ccb0 100644
--- a/software-license-manager/slm_bootstrap.php
+++ b/software-license-manager/slm_bootstrap.php
@@ -8,7 +8,7 @@
 Description: Software license management solution for your web applications (WordPress plugins, Themes, PHP based membership script etc.)
 */
 
-if(!defined('ABSPATH')){
+if (!defined('ABSPATH')) {
     exit; //Exit if accessed directly
 }
 
@@ -25,7 +25,7 @@
 include_once('slm_plugin_core.php');
 
 //Activation handler
-function slm_activate_handler(){
+function slm_activate_handler() {
     //Do installer task
     slm_db_install();
 
@@ -37,7 +37,7 @@ function slm_activate_handler(){
 register_activation_hook(__FILE__,'slm_activate_handler');
 
 //Deactivation handler
-function slm_deactivate_handler(){
+function slm_deactivate_handler() {
     //Clear the daily cron event
     wp_clear_scheduled_hook('slm_daily_cron_event');
 
diff --git a/software-license-manager/slm_installer.php b/software-license-manager/slm_installer.php
index 7a91968..1cb9047 100644
--- a/software-license-manager/slm_installer.php
+++ b/software-license-manager/slm_installer.php
@@ -1,19 +1,19 @@
 <?php
 //***** Installer *****
 global $wpdb;
-require_once(ABSPATH . 'wp-admin/includes/upgrade.php');	
+require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
 
 //***Installer variables***
 $lic_key_table = SLM_TBL_LICENSE_KEYS;
 $lic_domain_table = SLM_TBL_LIC_DOMAIN;
 
 $charset_collate = '';
-if (!empty($wpdb->charset)){
+if (!empty($wpdb->charset)) {
     $charset_collate = "DEFAULT CHARACTER SET $wpdb->charset";
-}else{
+} else {
     $charset_collate = "DEFAULT CHARSET=utf8";
 }
-if (!empty($wpdb->collate)){
+if (!empty($wpdb->collate)) {
     $charset_collate .= " COLLATE $wpdb->collate";
 }
         

From f773b172f60450a6b59726754e3f0a9e6664a764 Mon Sep 17 00:00:00 2001
From: andrii-pukhalevych <a.puhalevich@gmail.com>
Date: Thu, 21 May 2020 17:16:49 +0300
Subject: [PATCH 3/4] do not use copy of jQuery (may cause problems on some
 configurations)

---
 .../menu/slm-add-licenses.php                 | 22 +++++++++----------
 .../menu/slm-list-licenses-class.php          |  2 +-
 2 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/software-license-manager/menu/slm-add-licenses.php b/software-license-manager/menu/slm-add-licenses.php
index 108d9e6..c358ba0 100644
--- a/software-license-manager/menu/slm-add-licenses.php
+++ b/software-license-manager/menu/slm-add-licenses.php
@@ -352,26 +352,26 @@ function wp_lic_mgr_add_licenses_menu() {
     </div>
 
 	<script type="text/javascript">
-	jQuery( function( $ ) {
-		$( '.del' ).on( 'click', function( e ) {
+	jQuery( function() {
+		jQuery( '.del' ).on( 'click', function( e ) {
 			e.preventDefault();
 
-			var $link = $( this );
+			var $link = jQuery( this );
 
 			if ( ! confirm( 'Are you sure you want to remove this domain?' ) ) {
 				$link.blur();
 				return false;
 			}
 
-			var $spinner = $( '<span />' ).addClass( 'spinner' ).css( 'visibility', 'visible' ).css( 'margin', '0 0 0 2px' );
+			var $spinner = jQuery( '<span />' ).addClass( 'spinner' ).css( 'visibility', 'visible' ).css( 'margin', '0 0 0 2px' );
 			$link.before( $spinner ).hide();
 
 			var id = $link.attr( 'id' ),
-				$msg = $( '#reg_del_msg' );
+				$msg = jQuery( '#reg_del_msg' );
 
 			$msg.html( 'Loading ...' ).show();
 
-			$.get(
+			jQuery.get(
 				'<?php echo esc_html( admin_url( 'admin-ajax.php' ) ); ?>' + '?action=del_reistered_domain&id=' + id,
 				function( data ) {
 					if ( 'success' === data ) {
@@ -382,14 +382,14 @@ function( data ) {
 							$tr.remove();
 
 							// Check if any more rows exist.
-							if ( ! $( '.domain-license-table tbody tr' ).length ) {
-								var $none  =$( '<p />' ).html( 'No domains activated.' ).hide();
-								$( '.domain-licenses' ).after( $none ).hide();
+							if ( ! jQuery( '.domain-license-table tbody tr' ).length ) {
+								var $none = jQuery( '<p />' ).html( 'No domains activated.' ).hide();
+								jQuery( '.domain-licenses' ).after( $none ).hide();
 								$none.fadeIn( 'fast' );
 							} else {
 								// Restripe table.
-								$( '.domain-license-table tbody tr.alternate' ).removeClass( 'alternate' );
-								$( '.domain-license-table tbody tr:even' ).addClass( 'alternate' );
+								jQuery( '.domain-license-table tbody tr.alternate' ).removeClass( 'alternate' );
+								jQuery( '.domain-license-table tbody tr:even' ).addClass( 'alternate' );
 							}
 						} );
 					} else {
diff --git a/software-license-manager/menu/slm-list-licenses-class.php b/software-license-manager/menu/slm-list-licenses-class.php
index 969d58f..b484b49 100644
--- a/software-license-manager/menu/slm-list-licenses-class.php
+++ b/software-license-manager/menu/slm-list-licenses-class.php
@@ -83,7 +83,7 @@ function get_bulk_actions() {
     }
 
     function process_bulk_action() {
-        if ('delete'===$this->current_action()) {
+        if ('delete' === $this->current_action()) {
             //Process delete bulk actions
             if (!isset($_REQUEST['item'])) {
                 $error_msg = '<p>'.__('Error - Please select some records using the checkboxes', 'slm').'</p>';

From ebf54680d5480bdc36f8771c2a3140bdab594b93 Mon Sep 17 00:00:00 2001
From: andrii-pukhalevych <a.puhalevich@gmail.com>
Date: Thu, 21 May 2020 17:31:16 +0300
Subject: [PATCH 4/4] use single quotes where its possible

---
 .../sample-php-scripts/create-license.php     | 10 ++--
 .../includes/slm-api-listener.php             | 28 +++++-----
 .../includes/slm-init-time-tasks.php          |  2 +-
 .../includes/slm-third-party-integration.php  | 52 +++++++++----------
 .../includes/slm-utility.php                  | 14 ++---
 .../menu/slm-add-licenses.php                 | 12 ++---
 .../menu/slm-integration-help-page.php        |  6 +--
 .../menu/slm-lic-settings.php                 | 12 ++---
 .../menu/slm-list-licenses-class.php          |  4 +-
 software-license-manager/slm_bootstrap.php    |  2 +-
 software-license-manager/slm_installer.php    |  6 +--
 software-license-manager/slm_plugin_core.php  |  6 +--
 12 files changed, 77 insertions(+), 77 deletions(-)

diff --git a/software-license-manager/client-side-examples/sample-php-scripts/create-license.php b/software-license-manager/client-side-examples/sample-php-scripts/create-license.php
index 1c050e1..2526cdf 100644
--- a/software-license-manager/client-side-examples/sample-php-scripts/create-license.php
+++ b/software-license-manager/client-side-examples/sample-php-scripts/create-license.php
@@ -1,12 +1,12 @@
 <?php
 
 // Post URL
-$postURL = "http://localhost:81/wp/wp7";
+$postURL = 'http://localhost:81/wp/wp7';
 // The Secret key
-$secretKey = "541fc9967d4b43.07908805";
-$firstname = "John";
-$lastname = "Doe";
-$email = "john.doe@gmail.com";
+$secretKey = '541fc9967d4b43.07908805';
+$firstname = 'John';
+$lastname = 'Doe';
+$email = 'john.doe@gmail.com';
 
 // prepare the data
 $data = array ();
diff --git a/software-license-manager/includes/slm-api-listener.php b/software-license-manager/includes/slm-api-listener.php
index b6dc195..27b648d 100644
--- a/software-license-manager/includes/slm-api-listener.php
+++ b/software-license-manager/includes/slm-api-listener.php
@@ -36,7 +36,7 @@ function creation_api_listener() {
 
             SLM_API_Utility::verify_secret_key_for_creation(); //Verify the secret key first.
 
-            $slm_debug_logger->log_debug("API - license creation (slm_create_new) request received.");
+            $slm_debug_logger->log_debug('API - license creation (slm_create_new) request received.');
             
             //Action hook
             do_action('slm_api_listener_slm_create_new');            
@@ -58,8 +58,8 @@ function creation_api_listener() {
             } else {
                 $fields['max_allowed_domains'] = strip_tags($_REQUEST['max_allowed_domains']);
             }
-            $fields['date_created'] = isset($_REQUEST['date_created'])?strip_tags($_REQUEST['date_created']):date("Y-m-d");
-            $fields['date_expiry'] = isset($_REQUEST['date_expiry'])?strip_tags($_REQUEST['date_expiry']):'';
+            $fields['date_created'] = isset($_REQUEST['date_created']) ? strip_tags($_REQUEST['date_created']) : date('Y-m-d');
+            $fields['date_expiry'] = isset($_REQUEST['date_expiry']) ? strip_tags($_REQUEST['date_expiry']) : '';
             $fields['product_ref'] = isset( $_REQUEST['product_ref'] ) ? wp_unslash( strip_tags( $_REQUEST['product_ref'] ) ) : '';
 
             global $wpdb;
@@ -91,7 +91,7 @@ function activation_api_listener() {
 
             SLM_API_Utility::verify_secret_key(); //Verify the secret key first.
 
-            $slm_debug_logger->log_debug("API - license activation (slm_activate) request received.");
+            $slm_debug_logger->log_debug('API - license activation (slm_activate) request received.');
             
             //Action hook
             do_action('slm_api_listener_slm_activate');             
@@ -106,10 +106,10 @@ function activation_api_listener() {
             $tbl_name = SLM_TBL_LICENSE_KEYS;
             $reg_table = SLM_TBL_LIC_DOMAIN;
             $key = $fields['lic_key'];
-            $sql_prep1 = $wpdb->prepare("SELECT * FROM $tbl_name WHERE license_key = %s", $key);
+            $sql_prep1 = $wpdb->prepare("SELECT * FROM {$tbl_name} WHERE license_key = %s", $key);
             $retLic = $wpdb->get_row($sql_prep1, OBJECT);
 
-            $sql_prep2 = $wpdb->prepare("SELECT * FROM $reg_table WHERE lic_key = %s", $key);
+            $sql_prep2 = $wpdb->prepare("SELECT * FROM {$reg_table} WHERE lic_key = %s", $key);
             $reg_domains = $wpdb->get_results($sql_prep2, OBJECT);
             if ($retLic) {
                 if ('blocked' === $retLic->lic_status) {
@@ -135,7 +135,7 @@ function activation_api_listener() {
                     $fields['lic_key_id'] = $retLic->id;
                     $wpdb->insert($reg_table, $fields);
                     
-                    $slm_debug_logger->log_debug("Updating license key status to active.");
+                    $slm_debug_logger->log_debug('Updating license key status to active.');
                     $data = array('lic_status' => 'active');
                     $where = array('id' => $retLic->id);
                     $updated = $wpdb->update($tbl_name, $data, $where);
@@ -171,7 +171,7 @@ function deactivation_api_listener() {
 
             SLM_API_Utility::verify_secret_key(); //Verify the secret key first.
 
-            $slm_debug_logger->log_debug("API - license deactivation (slm_deactivate) request received.");
+            $slm_debug_logger->log_debug('API - license deactivation (slm_deactivate) request received.');
             
             //Action hook
             do_action('slm_api_listener_slm_deactivate');            
@@ -186,10 +186,10 @@ function deactivation_api_listener() {
 
             global $wpdb;
             $registered_dom_table = SLM_TBL_LIC_DOMAIN;
-            $sql_prep = $wpdb->prepare("DELETE FROM $registered_dom_table WHERE lic_key=%s AND registered_domain=%s", $license_key, $registered_domain);
+            $sql_prep = $wpdb->prepare("DELETE FROM {$registered_dom_table} WHERE lic_key=%s AND registered_domain=%s", $license_key, $registered_domain);
             $delete = $wpdb->query($sql_prep);
             if (false === $delete) {
-                $slm_debug_logger->log_debug("Error - failed to delete the registered domain from the database.");
+                $slm_debug_logger->log_debug('Error - failed to delete the registered domain from the database.');
             } else if (0 == $delete) {
                 $args = (array('result' => 'error', 'message' => 'The license key on this domain is already inactive', 'error_code' => SLM_Error_Codes::DOMAIN_ALREADY_INACTIVE));
                 SLM_API_Utility::output_api_response($args);
@@ -207,11 +207,11 @@ function check_api_listener() {
 
             SLM_API_Utility::verify_secret_key(); //Verify the secret key first.
 
-            $slm_debug_logger->log_debug("API - license check (slm_check) request received.");
+            $slm_debug_logger->log_debug('API - license check (slm_check) request received.');
             
             $fields = array();
             $fields['lic_key'] = trim(strip_tags($_REQUEST['license_key']));
-            $slm_debug_logger->log_debug("License key: " . $fields['lic_key']);
+            $slm_debug_logger->log_debug('License key: ' . $fields['lic_key']);
 
             //Action hook
             do_action('slm_api_listener_slm_check');
@@ -220,10 +220,10 @@ function check_api_listener() {
             $tbl_name = SLM_TBL_LICENSE_KEYS;
             $reg_table = SLM_TBL_LIC_DOMAIN;
             $key = $fields['lic_key'];
-            $sql_prep1 = $wpdb->prepare("SELECT * FROM $tbl_name WHERE license_key = %s", $key);
+            $sql_prep1 = $wpdb->prepare("SELECT * FROM {$tbl_name} WHERE license_key = %s", $key);
             $retLic = $wpdb->get_row($sql_prep1, OBJECT);
 
-            $sql_prep2 = $wpdb->prepare("SELECT * FROM $reg_table WHERE lic_key = %s", $key);
+            $sql_prep2 = $wpdb->prepare("SELECT * FROM {$reg_table} WHERE lic_key = %s", $key);
             $reg_domains = $wpdb->get_results($sql_prep2, OBJECT);
             if ($retLic) {//A license key exists
                 $args = apply_filters( 'slm_check_response_args', array(
diff --git a/software-license-manager/includes/slm-init-time-tasks.php b/software-license-manager/includes/slm-init-time-tasks.php
index 928f094..5f2d7df 100644
--- a/software-license-manager/includes/slm-init-time-tasks.php
+++ b/software-license-manager/includes/slm-init-time-tasks.php
@@ -35,7 +35,7 @@ function slm_daily_cron_event_handler()
         
         if ( isset($options['enable_auto_key_expiry']) && '1' == $options['enable_auto_key_expiry']) {
             //Do the auto key expiry task
-            SLM_Debug_Logger::log_debug_st("SLM daily cronjob - auto expiry of license key is enabled.");
+            SLM_Debug_Logger::log_debug_st('SLM daily cronjob - auto expiry of license key is enabled.');
             SLM_Utility::do_auto_key_expiry();
         }
         
diff --git a/software-license-manager/includes/slm-third-party-integration.php b/software-license-manager/includes/slm-third-party-integration.php
index d18e0e8..2e75cae 100644
--- a/software-license-manager/includes/slm-third-party-integration.php
+++ b/software-license-manager/includes/slm-third-party-integration.php
@@ -8,15 +8,15 @@
 
 function slm_handle_estore_email_body_filter($body, $payment_data, $cart_items) {
     global $slm_debug_logger, $wpdb;
-    $slm_debug_logger->log_debug("WP eStore integration - checking if a license key needs to be created for this transaction.");
-    $products_table_name = $wpdb->prefix . "wp_eStore_tbl";
-    $slm_data = "";
+    $slm_debug_logger->log_debug('WP eStore integration - checking if a license key needs to be created for this transaction.');
+    $products_table_name = "{$wpdb->prefix}wp_eStore_tbl";
+    $slm_data = '';
 
     //Check if this is a recurring payment.
     if ( function_exists('is_paypal_recurring_payment') ) {
         $recurring_payment = is_paypal_recurring_payment($payment_data);
         if ( $recurring_payment ) {
-            $slm_debug_logger->log_debug("This is a recurring payment. No need to create a new license key.");
+            $slm_debug_logger->log_debug('This is a recurring payment. No need to create a new license key.');
             do_action('slm_estore_recurring_payment_received', $payment_data, $cart_items);
             return $body;
         }
@@ -31,14 +31,14 @@ function slm_handle_estore_email_body_filter($body, $payment_data, $cart_items)
         }
         $slm_debug_logger->log_debug('License Manager - Item Number: ' . $prod_id . ', Quantity: ' . $quantity . ', Item Name: ' . $item_name);
 
-        $retrieved_product = $wpdb->get_row("SELECT * FROM $products_table_name WHERE id = '$prod_id'", OBJECT);
+        $retrieved_product = $wpdb->get_row("SELECT * FROM {$products_table_name} WHERE id = '$prod_id'", OBJECT);
         $package_product = eStore_is_package_product($retrieved_product);
         if ($package_product) {
             $slm_debug_logger->log_debug('Checking license key generation for package/bundle product.');
             $product_ids = explode(',', $retrieved_product->product_download_url);
             foreach ($product_ids as $id) {
                 $id = trim($id);
-                $retrieved_product_for_specific_id = $wpdb->get_row("SELECT * FROM $products_table_name WHERE id = '$id'", OBJECT);
+                $retrieved_product_for_specific_id = $wpdb->get_row("SELECT * FROM {$products_table_name} WHERE id = '$id'", OBJECT);
                 //$slm_data .= slm_estore_check_and_generate_key($retrieved_product_for_specific_id, $payment_data, $cart_items, $item_name);
                 $slm_data .= slm_estore_check_and_create_key_for_qty($retrieved_product_for_specific_id, $payment_data, $cart_items, $item_name, $quantity);
             }
@@ -48,12 +48,12 @@ function slm_handle_estore_email_body_filter($body, $payment_data, $cart_items)
         }
     }
 
-    $body = str_replace("{slm_data}", $slm_data, $body);
+    $body = str_replace('{slm_data}', $slm_data, $body);
     return $body;
 }
 
 function slm_estore_check_and_create_key_for_qty($retrieved_product, $payment_data, $cart_items, $item_name, $quantity) {
-    $prod_key_data = "";
+    $prod_key_data = '';
     for ($i = 0; $i < $quantity; $i++) {
         $prod_key_data .= slm_estore_check_and_generate_key($retrieved_product, $payment_data, $cart_items, $item_name);
     }
@@ -86,7 +86,7 @@ function slm_estore_create_license($retrieved_product, $payment_data, $cart_item
 
     //Lets check any product specific configuration.
     $prod_id = $retrieved_product->id;
-    $product_meta = $wpdb->get_row("SELECT * FROM $product_meta_table_name WHERE prod_id = '$prod_id' AND meta_key='slm_max_allowed_domains'", OBJECT);
+    $product_meta = $wpdb->get_row("SELECT * FROM {$product_meta_table_name} WHERE prod_id = '$prod_id' AND meta_key='slm_max_allowed_domains'", OBJECT);
     if ($product_meta) {
         //Found product specific SLM config data.
         $max_domains = $product_meta->meta_value;
@@ -94,7 +94,7 @@ function slm_estore_create_license($retrieved_product, $payment_data, $cart_item
         //Use the default value from settings (the $max_domains variable contains the default value already).
     }
     //Lets check if any product specific expiry date is set
-    $product_meta = $wpdb->get_row("SELECT * FROM $product_meta_table_name WHERE prod_id = '$prod_id' AND meta_key='slm_date_of_expiry'", OBJECT);
+    $product_meta = $wpdb->get_row("SELECT * FROM {$product_meta_table_name} WHERE prod_id = '$prod_id' AND meta_key='slm_date_of_expiry'", OBJECT);
     if ($product_meta) {
         //Found product specific SLM config data.
         $num_days_before_expiry = $product_meta->meta_value;
@@ -115,7 +115,7 @@ function slm_estore_create_license($retrieved_product, $payment_data, $cart_item
     $fields['company_name'] = $payment_data['company_name'];
     $fields['txn_id'] = $payment_data['txn_id'];
     $fields['max_allowed_domains'] = $max_domains;
-    $fields['date_created'] = date("Y-m-d"); //Today's date
+    $fields['date_created'] = date('Y-m-d'); //Today's date
     $fields['date_expiry'] = $slm_date_of_expiry;
     $fields['product_ref'] = $prod_id;//WP eStore product ID
     $fields['subscr_id'] = isset($payment_data['subscr_id']) ? $payment_data['subscr_id'] : '';
@@ -129,11 +129,11 @@ function slm_estore_create_license($retrieved_product, $payment_data, $cart_item
     if (!$result) {
         $slm_debug_logger->log_debug('Notice! initial database table insert failed on license key table (User Email: ' . $fields['email'] . '). Trying again by converting charset', true);
         //Convert the default PayPal IPN charset to UTF-8 format
-        $first_name = mb_convert_encoding($fields['first_name'], "UTF-8", "windows-1252");
+        $first_name = mb_convert_encoding($fields['first_name'], 'UTF-8', 'windows-1252');
         $fields['first_name'] = esc_sql($first_name);
-        $last_name = mb_convert_encoding($fields['last_name'], "UTF-8", "windows-1252");
+        $last_name = mb_convert_encoding($fields['last_name'], 'UTF-8', 'windows-1252');
         $fields['last_name'] = esc_sql($last_name);
-        $company_name = mb_convert_encoding($fields['company_name'], "UTF-8", "windows-1252");
+        $company_name = mb_convert_encoding($fields['company_name'], 'UTF-8', 'windows-1252');
         $fields['company_name'] = esc_sql($company_name);
 
         $result = $wpdb->insert($tbl_name, $fields);
@@ -161,25 +161,25 @@ function slm_estore_product_configuration_html($product_config_html, $prod_id) {
 
     if (empty($prod_id)) {
         //New product add
-        $slm_max_allowed_domains = "";
-        $slm_date_of_expiry = "";
+        $slm_max_allowed_domains = '';
+        $slm_date_of_expiry = '';
     } else {
         //Existing product edit
 
         //Retrieve the max domain value
-        $product_meta = $wpdb->get_row("SELECT * FROM $product_meta_table_name WHERE prod_id = '$prod_id' AND meta_key='slm_max_allowed_domains'", OBJECT);
+        $product_meta = $wpdb->get_row("SELECT * FROM {$product_meta_table_name} WHERE prod_id = '$prod_id' AND meta_key='slm_max_allowed_domains'", OBJECT);
         if ($product_meta) {
             $slm_max_allowed_domains = $product_meta->meta_value;
         } else {
-            $slm_max_allowed_domains = "";
+            $slm_max_allowed_domains = '';
         }
 
         //Retrieve the expiry date value
-        $product_meta = $wpdb->get_row("SELECT * FROM $product_meta_table_name WHERE prod_id = '$prod_id' AND meta_key='slm_date_of_expiry'", OBJECT);
+        $product_meta = $wpdb->get_row("SELECT * FROM {$product_meta_table_name} WHERE prod_id = '$prod_id' AND meta_key='slm_date_of_expiry'", OBJECT);
         if ($product_meta) {
             $slm_date_of_expiry = $product_meta->meta_value;
         } else {
-            $slm_date_of_expiry = "";
+            $slm_date_of_expiry = '';
         }
 
     }
@@ -232,13 +232,13 @@ function slm_estore_product_updated($prod_dat_array, $prod_id) {
     $product_meta_table_name = WP_ESTORE_PRODUCTS_META_TABLE_NAME;
 
     //Find the existing value for the max domains field (for the given product)
-    $product_meta = $wpdb->get_row("SELECT * FROM $product_meta_table_name WHERE prod_id = '$prod_id' AND meta_key='slm_max_allowed_domains'", OBJECT);
+    $product_meta = $wpdb->get_row("SELECT * FROM {$product_meta_table_name} WHERE prod_id = '{$prod_id}' AND meta_key='slm_max_allowed_domains'", OBJECT);
     if ($product_meta) {
         //Found existing value so lets update it
         //Better to do specific update (so the other meta values for example "download_limit_count" doesn't get set to empty).
-        $meta_key_name = "slm_max_allowed_domains";
+        $meta_key_name = 'slm_max_allowed_domains';
         $meta_value = $prod_dat_array['slm_max_allowed_domains'];
-        $update_db_qry = "UPDATE $product_meta_table_name SET meta_value='$meta_value' WHERE prod_id='$prod_id' AND meta_key='$meta_key_name'";
+        $update_db_qry = "UPDATE {$product_meta_table_name} SET meta_value='{$meta_value}' WHERE prod_id='{$prod_id}' AND meta_key='{$meta_key_name}'";
         $results = $wpdb->query($update_db_qry);
 
     } else {
@@ -251,13 +251,13 @@ function slm_estore_product_updated($prod_dat_array, $prod_id) {
     }
 
     //Find the existing value for the expiry date field (for the given product)
-    $product_meta = $wpdb->get_row("SELECT * FROM $product_meta_table_name WHERE prod_id = '$prod_id' AND meta_key='slm_date_of_expiry'", OBJECT);
+    $product_meta = $wpdb->get_row("SELECT * FROM {$product_meta_table_name} WHERE prod_id = '{$prod_id}' AND meta_key='slm_date_of_expiry'", OBJECT);
     if ($product_meta) {
         //Found existing value so lets update it
         //Better to do specific update (so the other meta values for example "download_limit_count" doesn't get set to empty).
-        $meta_key_name = "slm_date_of_expiry";
+        $meta_key_name = 'slm_date_of_expiry';
         $meta_value = $prod_dat_array['slm_date_of_expiry'];
-        $update_db_qry = "UPDATE $product_meta_table_name SET meta_value='$meta_value' WHERE prod_id='$prod_id' AND meta_key='$meta_key_name'";
+        $update_db_qry = "UPDATE {$product_meta_table_name} SET meta_value='{$meta_value}' WHERE prod_id='{$prod_id}' AND meta_key='{$meta_key_name}'";
         $results = $wpdb->query($update_db_qry);
 
     } else {
diff --git a/software-license-manager/includes/slm-utility.php b/software-license-manager/includes/slm-utility.php
index 2ab3c2f..b5a5807 100644
--- a/software-license-manager/includes/slm-utility.php
+++ b/software-license-manager/includes/slm-utility.php
@@ -7,13 +7,13 @@ class SLM_Utility {
 
     static function do_auto_key_expiry() {
         global $wpdb;
-        $current_date = (date ("Y-m-d"));
+        $current_date = (date ('Y-m-d'));
         $tbl_name = SLM_TBL_LICENSE_KEYS;
         
-        $sql_prep = $wpdb->prepare("SELECT * FROM $tbl_name WHERE lic_status !=%s", 'expired');//Load the non-expired keys
+        $sql_prep = $wpdb->prepare("SELECT * FROM {$tbl_name} WHERE lic_status !=%s", 'expired');//Load the non-expired keys
         $licenses = $wpdb->get_results($sql_prep, OBJECT);
         if (!$licenses) {
-            SLM_Debug_Logger::log_debug_st("do_auto_key_expiry() - no license keys found.");
+            SLM_Debug_Logger::log_debug_st('do_auto_key_expiry() - no license keys found.');
             return false;
         }
 
@@ -21,7 +21,7 @@ static function do_auto_key_expiry() {
             $key = $license->license_key;
             $expiry_date = $license->date_expiry;
             if ('0000-00-00' === $expiry_date) {
-                SLM_Debug_Logger::log_debug_st("This key (".$key.") doesn't have a valid expiry date set. The expiry of this key will not be checked.");
+                SLM_Debug_Logger::log_debug_st("This key ({$key}) doesn't have a valid expiry date set. The expiry of this key will not be checked.");
                 continue;
             }
             
@@ -29,11 +29,11 @@ static function do_auto_key_expiry() {
             $expire_dt = new DateTime($expiry_date);
             if ($today_dt > $expire_dt) {
                 //This key has reached the expiry. So expire this key.
-                SLM_Debug_Logger::log_debug_st("This key (".$key.") has expired. Expiry date: ".$expiry_date.". Setting license key status to expired.");
+                SLM_Debug_Logger::log_debug_st("This key ({$key}) has expired. Expiry date: {$expiry_date}. Setting license key status to expired.");
                 $data = array('lic_status' => 'expired');
                 $where = array('id' => $license->id);
                 $updated = $wpdb->update($tbl_name, $data, $where);
-                do_action('slm_license_key_expired',$license->id);//Trigger the license expired action hook.
+                do_action('slm_license_key_expired', $license->id);//Trigger the license expired action hook.
             }
             
         }
@@ -61,7 +61,7 @@ static function delete_registered_domains_of_key($key_row_id) {
         global $slm_debug_logger;
         global $wpdb;
         $reg_table = SLM_TBL_LIC_DOMAIN;
-        $sql_prep = $wpdb->prepare("SELECT * FROM $reg_table WHERE lic_key_id = %s", $key_row_id);
+        $sql_prep = $wpdb->prepare("SELECT * FROM {$reg_table} WHERE lic_key_id = %s", $key_row_id);
         $reg_domains = $wpdb->get_results($sql_prep, OBJECT);
         foreach ($reg_domains as $domain) {
             $row_to_delete = $domain->id;
diff --git a/software-license-manager/menu/slm-add-licenses.php b/software-license-manager/menu/slm-add-licenses.php
index c358ba0..36dc05b 100644
--- a/software-license-manager/menu/slm-add-licenses.php
+++ b/software-license-manager/menu/slm-add-licenses.php
@@ -16,7 +16,7 @@ function wp_lic_mgr_add_licenses_menu() {
     $created_date = '';
     $renewed_date = '';
     $expiry_date = '';
-    $current_date = (date ("Y-m-d"));
+    $current_date = (date ('Y-m-d'));
     $current_date_plus_1year = date('Y-m-d', strtotime('+1 year'));
     $product_ref = '';
     $subscr_id = '';
@@ -32,7 +32,7 @@ function wp_lic_mgr_add_licenses_menu() {
         $errors = '';
         $id = $_GET['edit_record'];
         $lk_table = SLM_TBL_LICENSE_KEYS;
-        $sql_prep = $wpdb->prepare("SELECT * FROM $lk_table WHERE id = %s", $id);
+        $sql_prep = $wpdb->prepare("SELECT * FROM {$lk_table} WHERE id = %s", $id);
         $record = $wpdb->get_row($sql_prep, OBJECT);
         $license_key = $record->license_key;
         $max_domains = $record->max_allowed_domains;
@@ -56,7 +56,7 @@ function wp_lic_mgr_add_licenses_menu() {
         //Check nonce
         if ( !isset($_POST['slm_add_edit_nonce_val']) || !wp_verify_nonce($_POST['slm_add_edit_nonce_val'], 'slm_add_edit_nonce_action' )) {
             //Nonce check failed.
-            wp_die("Error! Nonce verification failed for license save action.");
+            wp_die('Error! Nonce verification failed for license save action.');
         }
 
         do_action('slm_add_edit_interface_save_submission');
@@ -104,12 +104,12 @@ function wp_lic_mgr_add_licenses_menu() {
         $fields['product_ref'] = $product_ref;
         $fields['subscr_id'] = $subscr_id;
 
-        $id = isset($_POST['edit_record'])?$_POST['edit_record']:'';
+        $id = isset($_POST['edit_record']) ? $_POST['edit_record'] : '';
         $lk_table = SLM_TBL_LICENSE_KEYS;
         if (empty($id)) {//Insert into database
             $result = $wpdb->insert( $lk_table, $fields);
             $id = $wpdb->insert_id;
-            if ($result === false) {
+            if (false === $result) {
                 $errors .= __('Record could not be inserted into the database!', 'slm');
             }
         } else { //Update record
@@ -122,7 +122,7 @@ function wp_lic_mgr_add_licenses_menu() {
         }
 
         if (empty($errors)) {
-            $message = "Record successfully saved!";
+            $message = 'Record successfully saved!';
             echo '<div id="message" class="updated fade"><p>';
             echo $message;
             echo '</p></div>';
diff --git a/software-license-manager/menu/slm-integration-help-page.php b/software-license-manager/menu/slm-integration-help-page.php
index 201ab2a..841d3d9 100644
--- a/software-license-manager/menu/slm-integration-help-page.php
+++ b/software-license-manager/menu/slm-integration-help-page.php
@@ -18,13 +18,13 @@ function lic_mgr_integration_help_menu() {
     echo '<p>For information, updates and documentation, please visit the <a href="https://www.tipsandtricks-hq.com/software-license-manager-plugin-for-wordpress" target="_blank">License Manager Documentation</a> page.</p>';
     
     $api_query_post_url = SLM_SITE_HOME_URL;
-    echo "<strong>The License API Query POST URL For Your Installation</strong>";
+    echo '<strong>The License API Query POST URL For Your Installation</strong>';
     echo '<div class="lic_mgr_code">' . $api_query_post_url . '</div>';
 
-    echo "<strong>The License Activation or Deactivation API secret key</strong>";
+    echo '<strong>The License Activation or Deactivation API secret key</strong>';
     echo '<div class="lic_mgr_code">' . $secret_verification_key . '</div>';
     
-    echo "<strong>The License Creation API secret key</strong>";
+    echo '<strong>The License Creation API secret key</strong>';
     echo '<div class="lic_mgr_code">' . $creation_secret_key . '</div>';
     ?>
     <h2>3rd Party Integration</h2>
diff --git a/software-license-manager/menu/slm-lic-settings.php b/software-license-manager/menu/slm-lic-settings.php
index 05fb007..72741c4 100644
--- a/software-license-manager/menu/slm-lic-settings.php
+++ b/software-license-manager/menu/slm-lic-settings.php
@@ -24,15 +24,15 @@ function wp_lic_mgr_general_settings() {
 
     if (isset($_POST['slm_save_settings'])) {
 
-        if (!is_numeric($_POST["default_max_domains"])) {//Set it to one by default if incorrect value is entered
-            $_POST["default_max_domains"] = '1';
+        if (!is_numeric($_POST['default_max_domains'])) {//Set it to one by default if incorrect value is entered
+            $_POST['default_max_domains'] = '1';
         }
 
         $options = array(
-            'lic_creation_secret' => trim($_POST["lic_creation_secret"]),
-            'lic_prefix' => trim($_POST["lic_prefix"]),
-            'default_max_domains' => trim($_POST["default_max_domains"]),
-            'lic_verification_secret' => trim($_POST["lic_verification_secret"]),
+            'lic_creation_secret' => trim($_POST['lic_creation_secret']),
+            'lic_prefix' => trim($_POST['lic_prefix']),
+            'default_max_domains' => trim($_POST['default_max_domains']),
+            'lic_verification_secret' => trim($_POST['lic_verification_secret']),
             'enable_auto_key_expiry' => isset($_POST['enable_auto_key_expiry']) ? '1':'',
             'enable_debug' => isset($_POST['enable_debug']) ? '1':'',
         );
diff --git a/software-license-manager/menu/slm-list-licenses-class.php b/software-license-manager/menu/slm-list-licenses-class.php
index b484b49..a714ecf 100644
--- a/software-license-manager/menu/slm-list-licenses-class.php
+++ b/software-license-manager/menu/slm-list-licenses-class.php
@@ -135,8 +135,8 @@ function prepare_items() {
 		 * Ordering parameters:
 		 * Parameters that are going to be used to order the result.
 		 */
-                $orderby = !empty($_GET["orderby"]) ? strip_tags($_GET["orderby"]) : 'id';
-                $order = !empty($_GET["order"]) ? strip_tags($_GET["order"]) : 'DESC';
+		$orderby = !empty($_GET['orderby']) ? strip_tags($_GET['orderby']) : 'id';
+		$order = !empty($_GET['order']) ? strip_tags($_GET['order']) : 'DESC';
 
 		if ( ! empty( $_POST['slm_search'] ) ) {
 			$search_term = trim( sanitize_text_field( wp_unslash( $_POST['slm_search'] ) ) );
diff --git a/software-license-manager/slm_bootstrap.php b/software-license-manager/slm_bootstrap.php
index 072ccb0..cc1739b 100644
--- a/software-license-manager/slm_bootstrap.php
+++ b/software-license-manager/slm_bootstrap.php
@@ -14,7 +14,7 @@
 
 //Short name/slug "SLM" or "slm"
 
-define('WP_LICENSE_MANAGER_VERSION', "4.4.1");
+define('WP_LICENSE_MANAGER_VERSION', '4.4.1');
 define('WP_LICENSE_MANAGER_DB_VERSION', '1.4');
 define('WP_LICENSE_MANAGER_FOLDER', dirname(plugin_basename(__FILE__)));
 define('WP_LICENSE_MANAGER_URL', plugins_url('',__FILE__));
diff --git a/software-license-manager/slm_installer.php b/software-license-manager/slm_installer.php
index 1cb9047..f609a68 100644
--- a/software-license-manager/slm_installer.php
+++ b/software-license-manager/slm_installer.php
@@ -9,12 +9,12 @@
 
 $charset_collate = '';
 if (!empty($wpdb->charset)) {
-    $charset_collate = "DEFAULT CHARACTER SET $wpdb->charset";
+    $charset_collate = "DEFAULT CHARACTER SET {$wpdb->charset}";
 } else {
-    $charset_collate = "DEFAULT CHARSET=utf8";
+    $charset_collate = 'DEFAULT CHARSET=utf8';
 }
 if (!empty($wpdb->collate)) {
-    $charset_collate .= " COLLATE $wpdb->collate";
+    $charset_collate .= " COLLATE {$wpdb->collate}";
 }
         
 $lk_tbl_sql = "CREATE TABLE " . $lic_key_table . " (
diff --git a/software-license-manager/slm_plugin_core.php b/software-license-manager/slm_plugin_core.php
index 0005fe6..555d9db 100644
--- a/software-license-manager/slm_plugin_core.php
+++ b/software-license-manager/slm_plugin_core.php
@@ -2,8 +2,8 @@
 
 //Defines
 global $wpdb;
-define('SLM_TBL_LICENSE_KEYS', $wpdb->prefix . "lic_key_tbl");
-define('SLM_TBL_LIC_DOMAIN', $wpdb->prefix . "lic_reg_domain_tbl");
+define('SLM_TBL_LICENSE_KEYS', "{$wpdb->prefix}lic_key_tbl");
+define('SLM_TBL_LIC_DOMAIN', "{$wpdb->prefix}lic_reg_domain_tbl");
 define('SLM_MANAGEMENT_PERMISSION', 'manage_options');
 define('SLM_MAIN_MENU_SLUG', 'slm-main');
 define('SLM_MENU_ICON', 'dashicons-lock');
@@ -54,7 +54,7 @@ function slm_del_reg_dom() {
     global $wpdb;
     $reg_table = SLM_TBL_LIC_DOMAIN;
     $id = strip_tags($_GET['id']);
-    $ret = $wpdb->query("DELETE FROM $reg_table WHERE id='$id'");
+    $ret = $wpdb->query("DELETE FROM {$reg_table} WHERE id='{$id}'");
     echo ($ret) ? 'success' : 'failed';
     exit(0);
 }