function url_exists($url)

[drisate]

Hey guys i need to teste if an image exists or not ... and my function returns true what ever i put in it ...

 

    function url_exists($url) { 
        $hdrs = @get_headers($url); 
        return is_array($hdrs) ? preg_match('/^HTTP\\/\\d+\\.\\d+\\s+2\\d\\d\\s+.*$/',$hdrs[0]) : false; 
    } 

 

The function needs to be as faste as possible because it has to teste 300 jpg image on page load

[lemmin]

Just do :

if (@get_headers($url))
   return true;
else
   return false;

 

That is going to take a while because, no matter how you do it, you will have to wait for a timeout to determine if the url exists or not.

[simshaun]

You can specify a timeout if you use cURL.  See the first user-comment on this page.

[lemmin]

Even so, you don't know how long a server is going to take to respond so setting a timeout too low could result in a false negative.

[simshaun]

Yes, but you can adjust it to something you are comfortable with.  It does not necessarily have to be low.

 

Edit: To the OP, can you not test the images before page load?