phpjs/workbench/session/session_start.js

php.js offers community built php functions in javascript

function session_start() {
  // http://kevin.vanzonneveld.net
  // +   original by: Louis Stowasser
  // +   improved by: Brett Zamir (http://brett-zamir.me)
  // *     example 1:
  // *     returns 1:

  var _getcookie = function(name) {
    var cookies = document.cookie.split(';'), i = 0, l = cookies.length,
            current;
    for (; i < l; i++) {
      current = cookies[i].split('=');
      //            current[0] = current[0].replace(/\s+/,"");
      if (current[0] === name) {return current[1];}
    }
    return undefined;
  };
	/**
	* Check for a PHPSESSID. If found unpack it from the cookie
	* If not found, create it then pack everything in $_SESSION
	* into a cookie.
	*/
	if (document.cookie.indexOf('JSSESSID=') === -1) {
		$_SESSION = {};
		this.setcookie('JSSESSID', this.serialize($_SESSION));
	} else {
		$_SESSION = this.unserialize(this.urldecode(_getcookie('JSSESSID')));
	}
}


/**

    * Check for a PHPSESSID. If found unpack it from the cookie
    * If not found, create it then pack everything in $_SESSION
    * into a cookie.
    */
function session_start() {
  // http://kevin.vanzonneveld.net
  // +   original by: Louis Stowasser
  // +   improved by: Brett Zamir (http://brett-zamir.me)
  // -    depends on: unserialize
  // -    depends on: serialize
  // -    depends on: urlencode
  // *     example 1:
  // *     returns 1:

  //* Bundle all session destroying functions (they all do the same thing)
  //* Resets the global $_SESSION and sets the cookie to null
  var t = this;
  var _getcookie = function(name) {
    var cookies = document.cookie.split(';'), i = 0, l = cookies.length,
            current;
    for (; i < l; i++) {
      current = cookies[i].split('=');
      //            current[0] = current[0].replace(/\s+/,"");
      if (current[0] === name) {return current[1];}
    }
    return undefined;
  };
  var session_set_cookie = function(name, value, expires, path, domain, secure) {
    if (expires) {
      expires = (new Date((new Date).getTime() + expires * 3600)).toGMTString();
    }

    var r = [name + '=' + t.urlencode(value)], s = {}, i = '';
    s = {expires: expires, path: path, domain: domain};
    for (var i in s) {
      if (s.hasOwnProperty(i)) { // Exclude items on Object.prototype
        s[i] && r.push(i + '=' + s[i]);
      }
    }

    return secure && r.push('secure'), document.cookie = r.join(';'), true;
  };

  var sid = 'JSSESSID';
  this.php_js = this.php_js || {};
  var pj = this.php_js;
  var cookie = _getcookie(sid);
  if (!cookie || cookie === 'null') {
    t.$_SESSION = {};
    return session_set_cookie(sid, t.serialize(t.$_SESSION), pj.lifetime, pj.path, pj.domain, pj.secure);
  }
  t.$_SESSION = t.unserialize(t.urldecode(_getcookie(sid)));
  return true;
}