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Editorial Team
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Asked: 2026-05-23T16:11:16+00:00

I’m going through an HTML file replacing all the references to external files with

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I’m going through an HTML file replacing all the references to external files with new ones, however, sometimes this results in errors.

For example: I want to replace all instances of styles.css with 1.css and all instances of iestyles.css with 2.css in this source code:

<html>
  <link href="styles.css" />
  <link href="iestyles.css" />
</html>

Once I’ve run str_replace("styles.css", "1.css", $html); the source code looks like this:

<html>
  <link href="1.css" />
  <link href="ie1.css" />
</html>

So when I run the second query, it doesn’t change the iestyles.css reference because it no longer exists. Is there a way around this? I guess I could invent an elaborate regular expression, but there are a lot of variables to consider because not all code is well formed.

Cheers

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1 Answer

  1. Editorial Team

    Just change the order: First replace iestyles.css with 2.css and then replace styles.css with 1.css.

    If you are sure the filename is the only thing within the href-attribut, you could also include the double quotes "

    $html = str_replace('"styles.css"', '"1.css"', $html);
$html = str_replace('"iestyles.css"', '"2.css"', $html);
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