php - preg_match get div content with class -

i have code that

<div class="x-ic test"><div class="abc">test</div><table>.......</table><p>....</p><div style="margin:5px;"></div></div> 

i tried few pattern didnt result want.

and need result below

<div class="abc">test</div><table>.......</table><p>....</p><div style="margin:5px;"></div> 

use domdocument - i've written code functions in case want perform similar operations again:

function dominnerhtml(domnode $element) {     $innerhtml = "";     $children = $element->childnodes;     foreach ($children $child)     {         $innerhtml .= $element->ownerdocument->savehtml($child);     }     return $innerhtml; } function getelcontentsbytagclass($html,$tag,$class) {     $doc = new domdocument();     $doc->loadhtml($html);//turn $html string dom document     $els = $doc->getelementsbytagname($tag); //find elements matching our tag name ("div" in example)     foreach($els $el)     {         //for each element, class, , if matches return it's contents         $classattr = $el->getattribute("class");         if(preg_match('#\b'.$class.'\b#',$classattr) > 0) return dominnerhtml($el);     } }  //calling it: $html = '<div class="x-ic test"><div class="abc">test</div><table>.......</table><p>....</p><div style="margin:5px;"></div></div>';  $ret = getelcontentsbytagclass($html,'div','x-ic test');//<div class="abc">test</div><table>.......</table><p>....</p><div style="margin:5px;"></div> 

php fiddle - run (f9)