PHP remove wrapping DIV-CodePudding

I have this structure

<div >
  <div id="wrap">
    <div >
      Content
    </div>
  </div>
</div>

I would like to remove the div with id wrap but keep the contentlike this

<div >
  <div >
    Content
  </div>
</div>

I've tried a few regular expressions but withour sucess

$content = preg_replace('/<div[^>] id="[^>]*wrap[^>]*"[^>]*>.*?<\/div>/i', '', $content);

$content = preg_replace('/<div id="wrap">(. ?)<\/div>', '', $content);

CodePudding user response：

Modifying HTML through regex is bad idea and it leads to unexpected errors. You should better use DOM api for this:

$s = '<div >
  <div id="wrap">
    <div >
      Content 1
    </div>
    <div >
      Content 2
    </div>
    <p id="ab12">Hello</p>
    <img src="xy.jpg"/>
  </div>
  <p id="pqr123">Hello</p>
  <img src="ab.jpg"/>
</div>';

$doc = new DOMDocument();
$doc->loadHTML($s, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
$xpath = new DOMXPath($doc);
$nlist = $xpath->query("//div[@id='wrap']");

for($i=0; $i < $nlist->length; $i  ) {
   $node = $nlist->item($i);
   for($j=0; $j < $node->childNodes->length; $j  ) {
      $child = $node->childNodes->item($j);
      if ($child->nodeName != "#text") {
         $node->parentNode->appendChild($child);
      }
   }
   $node->parentNode->removeChild($node);
}

$doc->formatOutput = true;
$newHTML =  $doc->saveHTML();
echo $newHTML;

Output:

<div >

  <p id="pqr123">Hello</p>
  <img src="ab.jpg">
<div >
      Content 1
    </div>
<div >
      Content 2
    </div>
<p id="ab12">Hello</p>
<img src="xy.jpg">
</div>

Code Demo

CodePudding user response：

If you need a quick and dirty solution, why not just removing the id? This would be fine if your CSS is targeting the ID not the nesting.

echo str_replace('id="wrap"', '', $html);

You can manipulate HTML very well with DOM. This is the preferred way you should choose.

$html = <<<'_HTML_'
<div >
  <div id="wrap">
    <div >
      Content
    </div>
  </div>
</div>
_HTML_;

$doc = new DOMDocument();
$doc->loadHTML($html, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
$wrap = $doc->getElementById('wrap');

$wrapContent = $wrap->firstElementChild->cloneNode(true);
$wrapParent = $wrap->parentNode;

$wrapParent->removeChild($wrap);
$wrapParent->appendChild($wrapContent);
$doc->formatOutput = true;

echo $doc->saveHTML();

gives

<div >
  
<div >
      Content
    </div>
</div>