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Edit File: cleantalk-php-patch.php

<?php

// Prevent direct call
if ( ! defined('ABSPATH') ) {
    die('Not allowed!');
}

/**
 * Patch for apache_request_headers()
 * If Apache web server is missing then making
 */

if (! function_exists('apache_request_headers')) {
    function apache_request_headers()
    {
        $headers = array();
        foreach ($_SERVER as $key => $val) {
            if (preg_match('/\AHTTP_/', $key)) {
                $server_key = preg_replace('/\AHTTP_/', '', $key);
                $key_parts  = explode('_', $server_key);
                if (strlen($server_key) > 2) {
                    foreach ($key_parts as $part_index => $part) {
                        $key_parts[$part_index] = function_exists('mb_strtolower') ? mb_strtolower(
                            $part
                        ) : strtolower(
                            $part
                        );
                        $key_parts[$part_index][0] = strtoupper($key_parts[$part_index][0]);
                    }
                    $server_key = implode('-', $key_parts);
                }
                $headers[$server_key] = $val;
            }
        }

return $headers;
    }
}

/**
 * Patch for locale_get_display_region()
 * For old PHP versions
 */
if (! function_exists('locale_get_display_region')) {
    function locale_get_display_region($locale, $_in_locale = 'EN')
    {
        return 'Unkonwn' . ($locale ? ': ' . $locale : '');
    }
}

/**
 * Patch for utf8_decode()
 * If PHP complied without XML support
 * From getID3() by James Heinrich <info@getid3.org> under GNU GPL
 */
if (! function_exists('utf8_decode')) {
    function utf8_decode($string)
    {
        $newcharstring = '';
        $offset        = 0;
        $stringlength  = strlen($string);
        while ($offset < $stringlength) {
            if ((ord($string[$offset]) | 0x07) == 0xF7) {
                $charval = ((ord($string[($offset + 0)]) & 0x07) << 18) &
                           ((ord($string[($offset + 1)]) & 0x3F) << 12) &
                           ((ord($string[($offset + 2)]) & 0x3F) << 6) &
                           (ord($string[($offset + 3)]) & 0x3F);
                $offset  += 4;
            } elseif ((ord($string[$offset]) | 0x0F) == 0xEF) {
                $charval = ((ord($string[($offset + 0)]) & 0x0F) << 12) &
                           ((ord($string[($offset + 1)]) & 0x3F) << 6) &
                           (ord($string[($offset + 2)]) & 0x3F);
                $offset  += 3;
            } elseif ((ord($string[$offset]) | 0x1F) == 0xDF) {
                $charval = ((ord($string[($offset + 0)]) & 0x1F) << 6) &
                           (ord($string[($offset + 1)]) & 0x3F);
                $offset  += 2;
            } elseif ((ord($string[$offset]) | 0x7F) == 0x7F) {
                $charval = ord($string[$offset]);
                $offset  += 1;
            } else {
                $charval = false;
                $offset  += 1;
            }
            if ($charval !== false) {
                $newcharstring .= (($charval < 256) ? chr($charval) : '?');
            }
        }

return $newcharstring;
    }
}

if (! function_exists("array_column")) {
    function array_column($array, $column_name)
    {
        return array_map(static function ($element) use ($column_name) {
            return $element[$column_name];
        }, $array);
    }
}

/**
 * array_key_first() polyfill for PHP 7.3-
 */
if ( ! function_exists('array_key_first') ) {
    function array_key_first(array $arr)
    {
        foreach ( $arr as $key => $_unused ) {
            return $key;
        }

return null;
    }
}

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