phpjs/experimental/runkit/runkit_method_rename.js

php.js offers community built php functions in javascript

function runkit_method_rename(classname, methodname, newname) {
  // http://kevin.vanzonneveld.net
  // +   original by: Brett Zamir (http://brett-zamir.me)
  // *     example 1: runkit_method_rename('someClass', 'someMethod', 'newMethod');
  // *     returns 1: true
  var getFuncName = function(fn) {
    var name = (/\W*function\s+([\w\$]+)\s*\(/).exec(fn);
    if (!name) {
      return '(Anonymous)';
    }
    return name[1];
  };

  if (typeof classname === 'string') {
    classname = this.window[classname];
  }

  /*
  var method = classname[methodname]; // Static
  classname[newname] = method;
  delete classname[methodname];
  */

  if (getFuncName(classname) !== 'PHP_JS' || // By default, don't allow overriding of PHP functions
      (this.php_js && this.php_js.ini && this.php_js.ini['runkit.internal_override'] && (this.php_js.ini['runkit.internal_override'].local_value === true || this.php_js.ini['runkit.internal_override'].local_value === 1 || this.php_js.ini['runkit.internal_override'].local_value === '1' || this.php_js.ini['runkit.internal_override'].local_value === 'true'))) {
    var method = classname.prototype[methodname];
    classname.prototype[newname] = method;
    delete classname.prototype[methodname];
    return true;
  }
  return false;
}