Removing tag attributes with regular expression in PHP

Question

How to remove all attributes from <a> tag except href="/index.php..." ? and add a custom class to it ?

So this:

<a href="/index.php?option=com_virtuemart&view=cart&Itemid=105&lang=en" style="float:right;">content</a>

Becomes:

<a href="index.php?option=com_virtuemart&view=cart&Itemid=105&lang=en" class="custom">content</a>

i cant manage the preg_replace to work it: `

<?php
    $text = '<a href="index.php?option=com_virtuemart&view=cart&Itemid=105&lang=en" class="custom">content</a>';
    echo preg_replace("/<a([a-z][a-z0-9]*)(?:[^>]*(\shref=['\"][^'\"]['\"]))?>/i", '<$1$2$3>', $text);
?>

i tried it if you are talking about html parser, but i can't manage it — aspirinemaga, Mar 03 '13 at 18:56
Possible duplicate with : http://stackoverflow.com/questions/770219/how-can-i-remove-attributes-from-an-html-tag — Kalzem, Mar 03 '13 at 18:59
Yeah, that's what I'm talking about. Perhaps you could post what you tried and we could help with that? — Wiseguy, Mar 03 '13 at 19:00
@Wiseguy - i tried that: `$doc = new DOMDocument();$doc->loadHTML($data->cart_show);`, but i see the answer already that it mine code wasn't finished. thanks for pointing me out — aspirinemaga, Mar 03 '13 at 19:18

score 2 · Accepted Answer · answered Mar 03 '13 at 19:19

2

DOMDocument is better, but with regex

preg_replace("/<a [^>]*?(href=[^ >]+)[^>]*>/i", '<a $1 class="custom">', $text);

Assumes no space in href and no > in attributes.

answered Mar 03 '13 at 19:19

MikeM

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score 1 · Answer 2 · answered Mar 03 '13 at 19:04

1

You could use DomDocument:

libxml_use_internal_errors(true);
$doc = new DOMDocument();
$doc->loadHTML('<a href="/index.php?option=com_virtuemart&view=cart&Itemid=105&lang=en" style="float:right;">content</a>');
$items = $doc->getElementsByTagName('a');
$href = $items->item(0)->getAttribute('href');
$value = $items->item(0)->nodeValue;
libxml_clear_errors();
echo '<a href="'.$href.'" class="custom">'.$value.'</a>';

answered Mar 03 '13 at 19:04

bitWorking

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i tried that one already, but without `libxml_` (didnt know about them) and it didn't worked. – aspirinemaga Mar 03 '13 at 19:23

Removing tag attributes with regular expression in PHP

2 Answers2