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Editorial Team
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Asked: 2026-05-25T06:53:55+00:00

So here comes the problem: I want to paste an advertisement after a specified

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So here comes the problem:
I want to paste an advertisement after a specified ##th paragraph.

Let me show:

<p><img src="an/images/pic.jpg" /></p>
<p>Intro text</p>
<p>A paragraph</p>
<p>Another paragraph</p>

I want to paste the advertisement below the second paragraph. The final code should be like that:

<p><img src="an/images/pic.jpg /></p>
<p>Intro text</p>
<div>Yepp, let's make money</div>
<p>A paragraph</p>
<p>Another paragraph</p>

I tried some regexp but i don’t get it. Ladies and Gentlemen please help me.

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1 Answer

  1. Editorial Team

    Taking RegEx match open tags except XHTML self-contained tags into consideration you might want to use a DOM/HTML parser for this.

    <?php
$doc = new DOMDocument;
$doc->loadhtml( getHTML() );

$xpath = new DOMXPath($doc);
$ns = $xpath->query( '/html/body/p[2]' );
if ( 0 < $ns->length ) {
    $parent = $ns->item(0)->parentNode;
    $nextSibling = $ns->item(0)->nextSibling;

    $p = $doc->createElement('p', 'Hi, this is Scott coming to you from another place and time');
    $parent->insertBefore($p, $nextSibling);
}
echo $doc->savehtml();

function getHTML() {
return '<html><head><title>...</title><body>
<p><img src="an/images/pic.jpg" /></p>
<p>Intro text</p>
<p>A paragraph</p>
<p>Another paragraph</p>
</body></html>';
}

    prints

    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
<html><head><title>...</title></head><body>
<p><img src="an/images/pic.jpg"></p>
<p>Intro text</p><p>Hi, this is Scott coming to you from another place and time</p>
<p>A paragraph</p>
<p>Another paragraph</p>
</body></html>
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