Parser.php

<?php

namespace Snowair\Dotenv;

class Parser extends \josegonzalez\Dotenv\Parser
{
    public function parse($contents)
    {
        $lines = preg_split('/\r\n|\r|\n/', $contents);
        $environment = array();
        foreach ($lines as $line) {
            $line = trim($line);
            if (empty($line)) {
                continue;
            }

            if ($line[0] == '#') {
                continue;
            }

            if (!preg_match('/(?:export )?(?<!\.)([a-zA-Z0-9_.]*)(\s?)=(\s?)(.*)/', $line, $matches)) {
                continue;
            }

            $key = $matches[1];
            $value = $matches[4];

            if (preg_match('/^[0-9]/', $key) == 1) {
                continue;
            }

            if (strlen($value) === 0) {
                $value = '';
            } elseif (strpbrk($value[0], '"\'') !== false) {
                $quote = $value[0];
                $regexPattern = sprintf('/^
                    %1$s          # match a quote at the start of the value
                    (             # capturing sub-pattern used
                     (?:          # we do not need to capture this
                      [^%1$s\\\\] # any character other than a quote or backslash
                      |\\\\\\\\   # or two backslashes together
                      |\\\\%1$s   # or an escaped quote e.g \"
                     )*           # as many characters that match the previous rules
                    )             # end of the capturing sub-pattern
                    %1$s          # and the closing quote
                    .*$           # and discard any string after the closing quote
                    /mx', $quote);
                $value = preg_replace($regexPattern, '$1', $value);
                $value = str_replace("\\$quote", $quote, $value);
                $value = str_replace('\\\\', '\\', $value);
                $value = $this->processQuotedValue($value, $environment);

                if (!empty($value) && strpbrk($value[0], '"\'') !== false) {
                    $quote = $value[0];
                    $value = preg_replace($regexPattern, '$1', $value);
                    $value = str_replace("\\$quote", $quote, $value);
                    $value = str_replace('\\\\', '\\', $value);
                }
            } else {
                $value = $this->processUnquotedValue($value);
            }

            $environment[$key] = $value;
        }

        return $environment;
    }
}