preg_replace Challenge

e12pilot

Well...it is a challenge for me atleast. Here is what I would like to do:

I am writing a preg_replace function that does a little vBulletin code to HTML work. Here is the kicker...a portion of the resulting string needs to be run through a PHP function that we wrote...

For example:

[elink=Google]http://www.google.com[/elink]

Will need to turn into:

<a href="http://www.ourdomain.com/redirect.php?link=base64_encode($link)">Google.com</a>

So, the preg_replace needs to run the base64_encode function to encode the destination URL and then place it into an HTML URL.

Here is what I have so far:

$lazy_code = preg_replace("/\[elink=(.+?)\](.+?)\[\/elink\]/", "<a href=http://www.ourdomain.com/redirect.php?link=".base64_encode($2).">$1</a>", $source_code);

This results in a PHP error.

Any ideas? Really appreciate the help.

Peter

Shrike

You could preg_replace_callback()

function myCallback($m)
{
  return "<a href=http://www.ourdomain.com/redirect.php?link=".base64_encode($m[2]).">$m[1]</a>";
}
$lazy_code = preg_replace_callback("/\[elink=(.+?)\](.+?)\[\/elink\]/", "myCallback", $source_code);

By the way using the

 forum tags can prevent the page from getting this wide ;)

e12pilot

Shrike,
Thanks for the help, it works perfectly. I had a feeling there was a function that did what I wanted, but Google wasn't turning up any results, so thanks.

Peter

Shrike

It's not entirely necessary to use preg_replace_callback, you could just use preg_match to capture the parts and then regular PHP to do the manipulations,