PHP find and replace html attribute in string - php

Question

I get iframe from some api and i hold this iframe in some var.
I want to search for "height" and change his value to something else. the same with "scrolling".
For example:
<iframe src="someurl.com" width="540" height="450" scrolling="yes" style="border: none;"></iframe>
After the php function the iframe will be:
we have change the "height" to 600px and "scrolling" to no
<iframe src="someurl.com" width="540" height="600" scrolling="no" style="border: none;"></iframe>
i have solution with this code:
$iframe = preg_replace('/(<*[^>]*height=)"[^>]+"([^>]*>)/', '\1"600"\2', $iframe);
the problem is that after the "preg_replace" run it remove all html attributes after the "height"
Thanks

Answer 1

You can use DOMDocument for it. Something like this:
function changeIframe($html) {
$dom = new DOMDocument;
$dom->loadHTML($html);
$iframes = $dom->getElementsByTagName('iframe');
if (isset($iframes[0])) {
$iframes[0]->setAttribute('height', '600');
$iframes[0]->setAttribute('scrolling', 'no');
return $dom->saveHTML($iframes[0]);
} else {
return false;
}
}
$html = '<iframe src="someurl.com" width="540" height="450" scrolling="yes" style="border: none;"></iframe>';
echo changeIframe($html);
With this method you can modify iframe as you want.
Thanks.

Answer 2

An example as you requested:
$str = '<iframe src="someurl.com" width="540" height="450" scrolling="yes" style="border: none;"></iframe>';
$str = preg_replace('/height=[\"\'][0-9]+[\"\']/i', 'height="600"', $str);
$str = preg_replace('/scrolling=[\"\']yes[\"\']/i', 'scrolling="no"', $str);
echo $str; // -> '<iframe src="someurl.com" width="540" height="600" scrolling="no" style="border: none;"></iframe>'