Online PHP editor | output for G3HbK

<?php $html = <<<HTML <!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content=""> <meta name="description" content=""> <meta name="author" content=""> <title></title> <link rel="apple-touch-icon" href=""> <link rel="shortcut icon" href="">  <link rel="stylesheet" href="">  <link rel="stylesheet" href="">  <link rel="stylesheet" href="">   <script src=""></script> </head> <body class=""> <nav class="nav1" role="navigation">  </nav> <div class="menubar1">  </div> <div class="menubar2"> <div> <div> <ul> <li></li> </ul> </div> </div>  </div>       <footer class="site-footer">  </footer> <script src=""></script>  <script src=""></script>  <script src=""></script>  <script src=""></script>    <script> /* Some Scripts */ </script> </body> </html> HTML; libxml_use_internal_errors(true); $doc = new \DOMDocument(); $doc->loadHTML($html); $menubar2_inner_div_count = (new \DOMXPath($doc))->query('//div[@class="menubar2"]//div')->length; $html = preg_replace('/^.*?<div class="menubar2">' . str_repeat('.*?<\/div>', $menubar2_inner_div_count + 1) . '/s', '' . PHP_EOL . '<?php include_once "include/header.php" ?>', $html); $html = preg_replace('/<footer class="site-footer">.*?<\/html>/s', '<?php include_once "include/footer.php" ?>', $html); $html = preg_replace('/^ {8}/m', '', $html); echo $html;