Need Regex help

renieravin

Hi, I'm new to regex, and I've been looking for a solution to this hours now - something I did not expect! ???

I'm using PHP and I have a discussion forum where I use TinyMCE to post comments. The user is allowed to insert emoticons, which are stored on my server. (Example path: http://www.mysite.com/tinymce/plugins/emotions/img/smiley-cool.gif)

How do I strip all <img> tags from the comment, EXCEPT the images coming from my own domain? (http://www.mysite.com/)
Thanks in advance!

nrg_alpha

As an example of some urls lumped into an array as a test:

$arr = array('<img src="www.whatever.com/images/image-01.jpg" />', '<img src="http://www.mysite.com/images/image-01.jpg" />', '<img src="booyah.com/gui/images/image-01.jpg" />');
foreach($arr as &$val){
   $val = preg_replace('#(?:<img.*?src=[\'"](?!http://www\.mysite\.com/)[^>]+>)#', '', $val);
}
echo '<pre>'.print_r($arr, true);

Output (when viewing source):

Array
(
    [0] => 
    [1] => <img src="http://www.mysite.com/images/image-01.jpg" />
    [2] => 
)

In your case, just plug the entire posting entry into the preg_replace instead of the sample array.

renieravin

@ - I recognized your sig! You helped me out here and I tried your code.

<img\b[^{>]*?src=(?![\'"]?[url]http://www.mysite.com/[/url])[^>]+>}

Strange problem though, it's working on localhost perfect, but on my production server it's stripping ALL images, even the smileys. (I'm posting the exact same code on both). Could this have anything to do with the magic_quotes_gpc setting? It's off on local, but set to ON on the production server. That's the only difference I see between both environments.

Going to try setting magic quotes to OFF now and I'll see what happens.

nrg_alpha

renieravin;10899898 wrote:
@ - I recognized your sig! You helped me out here

Hehe... I tend to use that sig (and avatar OP logo) everywhere I go 😉 And yeah, I sure didn't get the solution in that link, as I needed some guidance of my own. Live and learn, I suppose...

<img\b[^{>]*?src=(?![\'"]?[url]http://www.mysite.com/[/url])[^>]+>}

Strange problem though, it's working on localhost perfect, but on my production server it's stripping ALL images, even the smileys. (I'm posting the exact same code on both). Could this have anything to do with the magic_quotes_gpc setting? It's off on local, but set to ON on the production server. That's the only difference I see between both environments.

Going to try setting magic quotes to OFF now and I'll see what happens.

To be perfectly honest, I'm not sure what could be causing it on your live server, as I am not familiar with database work. Someone else might be able to pitch in with more information in that regard.