Link Verifier

[NYSiRacer]

Hi, could someone tell me what's the concept of a link verifier?
How does it determine if a site is responding?

Thanks.

[PyroX]

2 methods off the top of my head, you could open the page locally and check trhat it does not contain a 404 error:

<?
$page=file("http://www.yoursite.com/page.html");
$page=implode(" ",$page);
if(!eregi("404",$page)){
echo "real";
} else {
echo "not real";
}
?>

[NYSiRacer]

Thanks

[PyroX]

You should also check it for the other misc. html error codes, 401, 500, 501, ect ect.

[NYSiRacer]

Heh, it turns out that I don't even have to do any regular expressions because function file() returns false if a file is not found, so all I had to do was:

$link = @file("http://dontexist.blah/abc.efg");
if (!$link) {
// do whatever here
}