Online PHP editor | refs for rQG0c

<?php function walkDOM($node) { if($node->nodeName=="pre" || $node->nodeName=="code") { return; } elseif($node->nodeName=="img") { $node->attributes->getNamedItem("src")->nodeValue=str_replace('desktop-img','mobile-img',$node->attributes->getNamedItem("src")->nodeValue); } elseif($node->hasChildNodes()) { foreach(range(0,$node->childNodes->length-1) as $idx) { walkDOM($node->childNodes->item($idx)); } } } function changeImagePath($html) { $dom=new DOMDocument; $dom->loadHTML($html); $root=$dom->documentElement; walkDOM($root); return $dom->saveHTML(); } echo changeImagePath(<<<HTML <div class="wrapper"> <img src="img/demo/desktop-img/sample1.jpg" width="200" height="200" alt="image"> <img src="img/demo/desktop-img/sample2.jpg" width="200" height="200" alt="image"> <pre> <img src="img/demo/desktop-img/sample1.jpg" width="200" height="200" alt="image"> <img src="img/demo/desktop-img/sample2.jpg" width="200" height="200" alt="image"> </pre> <code> <img src="img/demo/desktop-img/sample1.jpg" width="200" height="200" alt="image"> <img src="img/demo/desktop-img/sample2.jpg" width="200" height="200" alt="image"> </code> </div> HTML );