php string replacement

I have a string that contains image tags.
I need to add a width to all image tags, except if they are smilie images.

So an image like this on should get a width added:

<img src="someurl...
should become:
<img width="200" src="someurl...

PHP:

Smilie-images will look like this in the string:

<img src="/images/smilies/someurl..

PHP:

They should not get the width added.

How can I do this?
Adding the width tag to the images is easy with replacements. But it also adds it to the smiley images.

 

You use preg_match to see if "smilies" exists in the string (I don't know the code off hand for this, just lookup the function on php.net).

Then something like this:

if(!preg_match(whatever parameters)) {
  $imgcode = ereg_replace("<img", "<img width=\"200\"", $imgcode);
}

PHP:

I may have the parameters mixed up for ereg_replace, but that's the basics of how to do it.

 

Yeah, okay. But the string can contain more than one image tag.
So I need to go through the tags one by one and check if it's a smilie or not...

 

$code = preg_replace('#<img src="([/images/smilies]^)">#iUe','<img width="200" src="\\l">',$code);

PHP:

Not sure if the ^ should be before or after to exclude.

Peace,