Posted by Domestos on 10/13/65 11:29

> Sure you could use a regular expression, but perhaps it's more convenient
> to
> try to fetch the content instead:
>
> $url = strpos($url, 'http://') === 0 ? $url : "http://$url";
> if (@file_get_contents($url)) {
> // URL is valid
> }


okay I am pretty new to PHP can you please explain the following...

what do the three '=' signs mean?

what does the '?' mark do?

and what is ' $url : http://$url ' doing?

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