urlencode links ???

I need to urlencode all links at an html-page.

I can isolate the links with:

$DataPrint[1] = preg_replace('/<a\s+.?href="([^{"]+)"[^>]}>([^{<]+)<\/a>/is','<a} href="\1">\2</a>', $DataPrint[1]);

Then I would like to urlencode(\1), which is not possible.

Any suggestions?

Also totally different methodes to urlencode all links at a page is very welcome

try something like
$DataPrint[1] = preg_replace('/<a\s+.?href="([^{"]+)"[^>]}>([^{<]+)<\/a>/is','<a} href="urlencode(\1)">\2</a>', $DataPrint[1]);

or read the php user notes at http://www.php.net/preg_replace there are examples using functions

Thanks for the hints and the link - this one works:

$DataPrint[1] = preg_replace("/<a\s+.?href=\"([^{\"]+)\"[^>]}>([^{<]+)<\/a>/e",} "'<a href=\"'.urlencode('\1').'\">$2</a>'", $DataPrint[1]);

\JOhn