phpjs/workbench/session/session_decode.js

php.js offers community built php functions in javascript

function session_decode(str) {
  // http://kevin.vanzonneveld.net
  // +   original by: Louis Stowasser
  // -    depends on: unserialize
  // -    depends on: urldecode
  // *     example 1:
  // *     returns 1:

  /**
* Decode string from session format
  */
  return this.unserialize(this.urldecode(str));
}