Help: Tagging from keyword list?

Hi,
i need to help, i have a keywords field in database.
There are keywords that are seperated with commas like "cat, dog, fat, dude"
ı want to convert these to
Tags: <a href="cat">cat</a>, <a href="dog">dog</a>, <a href="fat">fat</a>, <a href="dude">dude</a>
how can i success this as a function?
thanks.

 

$string = preg_replace('/[^\,\s]+/', '<a href="$0">$0</a>', $string);

PHP:

 

thanks for your help,
i want to use trim() function in the second parameter like;

$string = preg_replace('/[^\,\s]+/', '<a href="$0">trim("$0")</a>', $string);

PHP:

But i doesnt work, what is the wrong?

 

With my code, there won't be any spaces in the <a> tags. Maybe there'll be spaces outside them, but they're only visible in the source code (if more than one) Is that a problem?

 

i have used trim() just for an example, i will use many functions.
so should i use e modifier?

 

No, the e modifier.

$string = preg_replace('/[^\,\s]+/e', '"<a href=\"$0\">" . trim("$0")  ."</a>"', $string);

PHP:

 

great!, it is working, gave you a reputation.
thanks alot.

 

And sorry, I meant to say "yes, the e modifier", lol. I read your message too fast and thought you said "should I use the i modifier".

Glad you got it working though.