title: PHP - special regular expression
body: <p>i have got this string : </p>
  
  <pre><code>var wcall=wicketAjaxGet('?x=-DxRtr1ApWy1S-JoAgFwCid5mDvsjhWOhXpq0nZdO*WsUggdTvpUtQ',function() { }.bind(this),function() { }.bind(this), function() {
  </code></pre>
  
  <p>And i need to get this : </p>
  
  <pre><code>?x=-DxRtr1ApWy1S-JoAgFwCid5mDvsjhWOhXpq0nZdO*WsUggdTvpUtQ
  </code></pre>
  
  <p>How can i do that in PHP?</p>