Question

I want to convert all sizes in a html document. Everything with **px should be divided by 4. So 100px would become 25px.

For example:

<div style="height:100px;"></div>

should become

<div style="height:25px;"></div>

Here is a php code I wrote. But it doesn’t work.

$content = "<div style=\"height:100px;\"></div>";
$regex = "#([0-9]*)px#";
$output = preg_replace($regex,"$1/4",$content);

How do I do?

Answer 1

As an alternative to preg_replace_callback, you can use the e modifier to evaluate the replacement as php:

$content = "<div style=\"height:100px;\"></div>";
$regex = "#([0-9]*)px#e";
$output = preg_replace($regex,"round($1/4).'px'",$content);