title: uknown condition for if statement '@'
body: <p>My company has asked me to analyse backend code for one the live websites that our company  maintains. I have run into a problem. I can't quite figure what '@' is doing here in this code if(@($_SESSION['user'])){...}</p>
  
  <p>I looked everywhere what this means and haven't found anything even remotely resembling this. I hope someone on this forum can help me out. Below is the entire code snippet.</p>
  
  <pre><code>if(@($_SESSION['user']))
  {
      $usrid=$_SESSION['user'];
      $getprflimg=$db-&gt;singlerec("select img from register where 
      id='$usrid'");                                                                                                                                                                                                                                                          
      $imgurlprl=$getprflimg['img'];
      if(file_exists($url))
          $imgurlprl=$siteurl."uploads/user_images/".$imgurlprl;
      else
          $imgurlprl=$siteurl."/uploads/user_images/no_image.png";
  }
  </code></pre>