phpjs/experimental/info/get_magic_quotes_gpc.js

php.js offers community built php functions in javascript

function get_magic_quotes_gpc() {
  // http://kevin.vanzonneveld.net
  // +   original by: Brett Zamir (http://brett-zamir.me)
  // %        note 1: Besides being deprecated in PHP, magic quotes is not implemented within our
  // %        note 1: functions; here merely to indicate how the function could be accessed by our functions
  // *     example 1: get_magic_quotes_gpc();
  // *     returns 1: false

  return !!(this.php_js && this.php_js.ini && this.php_js.ini['magic_quotes_gpc'] &&
      this.php_js.ini['magic_quotes_gpc'].local_value);
}