Question

i have a string that contains HTML structure :

<p> ... </p>
<p> .... <a> .... </a></p>
<div id="quick_preview">
<p> .... </p>
</div>
<p> ... </p>

and what i want to do is just inject a <description> tag in div with class quick_preview after p tag. something like this :

<p> ... </p>
<p> .... <a> .... </a></p>
<div id="quick_preview">
  <description>
    <p> .... </p>
  </description>
</div>
<p> ... </p>

i use lots of techniques ,like domdocument or string processing, but can’t find the right solution.

Answer 1

Here is a rough example that should help you get started using PHP’s DOM functions. The example will need to be expanded to check for errors and such, but it does work.

$ php test.php 
<?xml version="1.0"?>
<root><p>First p</p><p>Another p<a>a link</a></p><div id="quick_preview"><description><p>Third p </p></description></div><p>Last p</p></root>

Here’s the code:

<?php

$xml = "<root><p>First p</p><p>Another p<a>a link</a></p><div id='quick_preview'><p>Third p </p></div><p>Last p</p></root>";

$doc = DOMDocument::loadXML($xml);

$xpath = new DOMXPath($doc);

$query = '//div';
$entries = $xpath->query($query);

$entry = $entries->item(0);

$new = $doc->createElement("description");
$new->appendChild($entry->firstChild);
$entry->appendChild($new);
echo $doc->saveXML();