求正则表达式完成这个需求,该如何解决

<br /><img src="http://www.ke6.com/wp-content/uploads/2014/02/hbzy1.jpg" alt="hbzy" width="60"    style="max-width:90%" class="alignnone size-full wp-image-2100" /><br />

<br /><div class="gif-box"><br /><img  src="http://www.ke6.com/wp-content/uploads/2014/02/hbzy1.jpg!static" _src="http://www.ke6.com/wp-content/uploads/2014/02/hbzy1.jpg!static" class="alignnone size-full wp-image-2100" tsrc="http://www.ke6.com/wp-content/uploads/2014/02/hbzy1.jpg"    style="max-width:90%"  style="max-width:90%" / alt="求正则表达式完成这个需求,该如何解决" ><br /><div class="gif-loading-box"><br /><i class="gif-loading" style="display:none;"></i><br /><i class="gif-play"></i><br /></div><br /></div><br />

$html = <<
<br /><img src="http://www.ke6.com/wp-content/uploads/2014/02/hbzy1.jpg" alt="hbzy" width="60"    style="max-width:90%" class="alignnone size-full wp-image-2100" /><br />





html;
$regImg = preg_match_all('//', $html, $matches) ;
$newSrc = $matches[1][0].'!static"'." _src=\"".$matches[1][0]."!static\" tsrc=\"".$matches[1][0];
$html = str_replace($matches[1][0], $newSrc, $html);
var_dump($html);