| 
<?php
 use voku\helper\HtmlDomParser;
 
 require_once '../vendor/autoload.php';
 
 $templateHtml = '
 <div>
 <div class="inner">
 <ul>
 <li><img alt="" src="none.jpg" data-lazyload="/pc/aaa.jpg"></a></li>
 <li><img alt="" src="none.jpg" data-lazyload="/pc/bbb.jpg"></a></li>
 </ul>
 </div>
 </div>
 ';
 
 $htmlTmp = HtmlDomParser::str_get_html($templateHtml);
 $data_attribute = [];
 
 foreach ($htmlTmp->find('.inner img') as $meta) {
 if ($meta->hasAttribute('data-lazyload')) {
 $data_attribute[] = $meta->getAttribute('data-lazyload');
 }
 }
 
 // dump contents
 /** @noinspection ForgottenDebugOutputInspection */
 var_export($data_attribute, false);
 
 /*
 [
 0 => '/pc/aaa.jpg',
 1 => '/pc/bbb.jpg',
 ]
 */
 
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