如何使用php检查网页上是否存在图片/链接？

Question

I'm goging to design benners and stuff for people and then I'll give them an image to put their profiles. I want to make a page on my localhost to check if image exist on their profile. Basically I want to see if " example1.com/myimg.jpg " exist on " example2.com/theirprofile ".

I want to see if the image exists on an external page. I don't have much experience with php. Is it possible to do sometihng like this?

Answer 1

This is what I usually do:

The idea is to make a cURL request just to check the result. If it's 200 then the resource exists.

function externalResourceExists($url) {
    $ch = curl_init($url); //$url is the url you need to check
    curl_setopt($ch, CURLOPT_NOBODY, true); //Don't get the body, we don't need it.
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
    curl_exec($ch);
    $retcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);                    
    curl_close($ch);        
    return $retcode == 200;
}

Then check if the function returns true.