phpjs/experimental/var/get_resource_type.js

php.js offers community built php functions in javascript

function get_resource_type(handle) {
  // http://kevin.vanzonneveld.net
  // +   original by: Brett Zamir (http://brett-zamir.me)
  // *     example 1: get_resource_type('a');
  // *     returns 1: false
  var getFuncName = function(fn) {
    var name = (/\W*function\s+([\w\$]+)\s*\(/).exec(fn);
    if (!name) {
      return '(Anonymous)';
    }
    return name[1];
  };
  if (!handle || typeof handle !== 'object' || !handle.constructor || getFuncName(handle.constructor) !== 'PHPJS_Resource') {
    return false;
  }

  return handle.get_resource_type();
}