title: php regex not working in php [preg_replace}
body: <p>I am trying to remove the following html but my regex isn't working </p>
  
  <pre><code>&lt;div class="vmargin"&gt;&lt;div&gt;&lt;iframe src="/test.php?u=N0Bhlant98C6MRj0D44HwJMuf5TdA%2F24oG9hQ2qqX6IR2IruUxVrrhLR4EpHQDvGtuHH4%2BLgJMBG6L5%2BTs6t6FfgCbo%3D&amp;amp;b=5&amp;amp;f=frame" style="width:718px;height:438px;border:0;margin:0;padding:0;" __idm_frm__="100"&gt;&lt;/iframe&gt;&lt;/div&gt;&lt;div&gt;&lt;a href="" class="report_video" data-video-id="732253" title="Report Video"&gt;Video Broken?&lt;/a&gt;&lt;/div&gt;&lt;/div&gt;
  </code></pre>
  
  <p>I tried the following regex </p>
  
  <pre><code>preg_replace("@&lt;div class=\"vmargin\".*?&lt;\\/div&gt;.*?&lt;\\/div&gt;&lt;\\/div&gt;@s",'', $input); 
  </code></pre>
  
  <p>What's wrong with it</p>