PHP Detecting if source image url link leads to a “broken” image?

Question

Suppose you have a thumbnail generator script that accepts source images in the form of a URL. Is there a way to detect if the source URL is \"broken\" - whether nonexistent

Answer 1

try for local files

for external domains

$headers = @get_headers($url);
if (preg_match("|200|", $headers[0])) {
// file exists
} else {
// file doesn't exist
}

Also you can use curl request for the same.