Checking if url exists?

[EchoFool]

Hi,

 

I am wondering if there is a way in php to check if an url uploaded by a user is valid... and that the url points to an image only.

 

Say for example i want to show a image hosted on photobucket, the url given would be http: etc etc .jpg

 

But firstly i need php to know does that url point to anything, then secondly does it point to an image.

Was wondering if php can check this kind of thing, is there a crude example of hows its done, then i can work off it to manipulate it to work into my site..

 

Hope you can help.

[Ken2k7]

cURL

[EchoFool]

Hmm the list there doesn't suggest anything to do with checking if url exists :S Although the terminology is throwing me... How does it check if the url exists and what does it return to tell the script if it exists or not ?

[Ken2k7]

Really!? I'll give you one last look before I slap you.

 

No offense intended. Just playing with you. But really, click the functions there and you'll find the one you need.

[DarkSuperHero]

<?php
$hosts = gethostbynamel('www.example.com');
print_r($hosts);
?>

Returns the IPv4 address or a string containing the unmodified hostname on failure.

 

theres also..

 

gethostbynamel

gethostbyaddr

gethostbyname

 

http://us2.php.net/manual-lookup.php?pattern=host

[EchoFool]

Right ok i didn't see that function in the list. With regards to gethostbynamel, do these expand into check if the url points to a image format ? Or will i need a seperate function for that aswell?

[Ken2k7]

http://us2.php.net/manual/en/function.curl-getinfo.php

 

That's what you want. And if you know about HTTP_CODE, you should be fine. Otherwise, read up on them.