php: how can I remove attributes from an html tag?

Question

How can I use php to strip all/any attributes from a tag, say a paragraph tag?

<p class="one" otherrandomattribute="two"> to <p>

Answer 1

HTML Purifier is one of the better tools for sanitizing HTML with PHP.

Answer 2

If you know what tags will be used regexps should help.

Answer 3

http://www.mt-soft.com.ar/2007/12/21/strip-tag-attributes-php/

Answer 4

Although there are better ways, you could actually strip arguments from html tags with a regular expression:

<?php
function stripArgumentFromTags( $htmlString ) {
    $regEx = '/([^<]*<\s*[a-z](?:[0-9]|[a-z]{0,9}))(?:(?:\s*[a-z\-]{2,14}\s*=\s*(?:"[^"]*"|\'[^\']*\'))*)(\s*\/?>[^<]*)/i'; // match any start tag

    $chunks = preg_split($regEx, $htmlString, -1,  PREG_SPLIT_DELIM_CAPTURE);
    $chunkCount = count($chunks);

    $strippedString = '';
    for ($n = 1; $n < $chunkCount; $n++) {
     $strippedString .= $chunks[$n];
    }

    return $strippedString;
}
?>

The above could probably be written in less characters, but it does the job (quick and dirty).