RegEx to add inline css (style tag) to link tag (<a>)

[everisk]

Hello,

 

I dont understand a little about RegEx but cannot really understand how to use all the funtions . I need to convert link tag <a href ....> that DOES NOT already have the css in them. Such as <a href="http://www.google.com" style="font-size: 11px;" other properties> should NOT matched but <a href="http://www.google.com" .. other properties> should match and a style="..." should be added.

 

I understand that I need to use preg_replace for that but dont know how to use it

 

Any help would be much appreciated. Thanks!

[xylex]

Any particular reason you're trying to do this with regex and not an XML library?

[discomatt]

A regex like this will work

 

'/<a(?:.(?!style="))*?>/s'

 

But keep in mind, you're using lookaround along with a lazy quantifier... this won't be the most efficient expression in the world.

[everisk]

Discomatt, thank you for your help! I think i got it. 

[effigy]

<?php
$data = <<<DATA
I dont understand a little about RegEx but cannot really understand how to use all the funtions . I need to convert link tag <a href ....> that DOES NOT already have the css in them. Such as <a href="http://www.google.com" style="font-size: 11px;" other properties> should NOT matched but <a href="http://www.google.com" .. other properties> should match and a style="..." should be added.
DATA;

echo htmlspecialchars(preg_replace('/<a((??!style=)[^>])+)>/', '<a style="xyz" $1>', $data));
?>

[everisk]

Thank you for a more complete example, effigy! I'll try that out.