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<?php /** * Code related to the request.lib.php interface. * * PHP version 5 * * @category Library * @package Sucuri * @subpackage SucuriScanner * @author Daniel Cid <dcid@sucuri.net> * @copyright 2010-2018 Sucuri Inc. * @license https://www.gnu.org/licenses/gpl-2.0.txt GPL2 * @link https://wordpress.org/plugins/sucuri-scanner */ if (!defined('SUCURISCAN_INIT') || SUCURISCAN_INIT !== true) { if (!headers_sent()) { /* Report invalid access if possible. */ header('HTTP/1.1 403 Forbidden'); } exit(1); } /** * HTTP request handler. * * Function definitions to retrieve, validate, and clean the parameters during a * HTTP request, generally after a form submission or while loading a URL. Use * these methods at most instead of accessing an index in the global PHP * variables _POST, _GET, _REQUEST since they may come with insecure data. * * @category Library * @package Sucuri * @subpackage SucuriScanner * @author Daniel Cid <dcid@sucuri.net> * @copyright 2010-2018 Sucuri Inc. * @license https://www.gnu.org/licenses/gpl-2.0.txt GPL2 * @link https://wordpress.org/plugins/sucuri-scanner */ class SucuriScanRequest extends SucuriScan { /** * Returns the value of the _GET, _POST or _REQUEST key. * * You can pass an additional parameter to execute a regular expression that * will return False if the value doesn't matches what the RegExp defined. * Very useful to filter user input besides form validations. * * @param array $list The array where the specified key will be searched. * @param string $key Name of the variable contained in _POST. * @param string $pattern Optional pattern to match allowed values. * @return array|string|bool Value from the global _GET or _POST variable. */ private static function request($list = array(), $key = '', $pattern = '') { $key = self::varPrefix((string) $key); if (!is_array($list) || !isset($list[$key])) { return false; } $key_value = $list[$key]; /* raw request parameter */ /* if the request data is an array, then only cast the value. */ if ($pattern === '_array' && is_array($key_value)) { return (array) $key_value; } /* match WordPress nonce */ if ($pattern === '_nonce') { $pattern = '[a-z0-9]{10}'; } /* match valid page identifier */ if ($pattern === '_page') { $pattern = '[a-z_]+'; } /* match every data format */ if ($pattern === '') { $pattern = '.*'; } /* check the format of the request data with a regex defined above. */ if (@preg_match('/^' . $pattern . '$/', $key_value)) { return self::escape($key_value); } return false; } /** * Returns the value stored in a specific index in the global _GET variable, * you can specify a pattern as the second argument to match allowed values. * * @param string $key Name of the variable contained in _GET. * @param string $pattern Optional pattern to match allowed values. * @return array|string Value from the global _GET variable. */ public static function get($key = '', $pattern = '') { return self::request($_GET, $key, $pattern); } /** * Returns the value stored in a specific index in the global _POST variable, * you can specify a pattern as the second argument to match allowed values. * * @param string $key Name of the variable contained in _POST. * @param string $pattern Optional pattern to match allowed values. * @return array|string Value from the global _POST variable. */ public static function post($key = '', $pattern = '') { return self::request($_POST, $key, $pattern); } /** * Returns the value stored in a specific index in the global _REQUEST variable, * you can specify a pattern as the second argument to match allowed values. * * @param string $key Name of the variable contained in _REQUEST. * @param string $pattern Optional pattern to match allowed values. * @return array|string Value from the global _REQUEST variable. */ public static function getOrPost($key = '', $pattern = '') { return self::request($_REQUEST, $key, $pattern); } }
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