Fastest Way To Check If A Site Is Up??

[DEViANCE]

Hi, I have been playing around with an old auto submitter script.

I added a function to see if the sites in the list are online before submission, so they would be automatically unticked if they were not online:



This is the function i used:

function Visit($url)

{

$agent = "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)";$ch=curl_init();

curl_setopt ($ch, CURLOPT_URL,$url );

curl_setopt($ch, CURLOPT_USERAGENT, $agent);

curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);

curl_setopt ($ch,CURLOPT_VERBOSE,false);

curl_setopt($ch, CURLOPT_TIMEOUT, 5);

$page=curl_exec($ch);

//echo curl_error($ch);

$httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);

curl_close($ch);

if($httpcode>=200 && $httpcode<300) return true;

else return false;

}

But it takes a very long time to load even with just ten or so sites using this method.. Is there any faster way to do this???

DEViANCE Reviewed by DEViANCE on 17th Sep 2009. Fastest Way To Check If A Site Is Up?? Hi, I have been playing around with an old auto submitter script. I added a function to see if the sites in the list are online before submission, so they would be automatically unticked if they were not online: http://www.besthostingforums.com/images/cdn/besthostingforums.com/2009/09/149.jpg This is the function i used: function Visit($url) { Rating: 5

[bennelsworth]

Probably takes a while because codemafia.org needs to timeout? Not sure you can make it any quicker at run time unless you set up a seperate task to check the sites every few minutes and store in a database then load that into the page?

[DEViANCE]

Nope, i only put codemafia.org in thier as an example for my screen shot, even when all sites are up its taking at least like five seconds or maybe ten... pages should not take that long to load nomatter what your doing..??

The only thing i can think of (as im pretty sure this is one of the best methods) is learning AJAX so i can make the sites show up as they are resolved?? I am ok with php but not tried ajax yet so might take me awhile to understand it.

I really need a faster function, even if its just slightly faster...

[William Palmer]

Faster way can you can do it in less than 5 seconds

ping website.com

[DEViANCE]

You have php code example of this??

[bennelsworth]

Assuming the host will respond to pings...

Maybe get_headers() - look for the 200 header - or file_get_contents() - look for something specific on the page; might be faster...

[DEViANCE]

Can you give me an example of the get headers method? I don't think file get contents is good at all, will surely take loads longer...??

[William Palmer]

If a host has disabled pings that will cause a variety amounts of issues to the server

97.99+ % ping is never disabled and if need be just make a .bat script to ping it

[bennelsworth]

$head = get_headers("the url you want to check", 1); 

$head is then an array, for example:

Array
(
    [0] => HTTP/1.1 200 OK
    [Date] => Sat, 29 May 2004 12:28:14 GMT
    [Server] => Apache/1.3.27 (Unix)  (Red-Hat/Linux)
    [Last-Modified] => Wed, 08 Jan 2003 23:11:55 GMT
    [ETag] => "3f80f-1b6-3e1cb03b"
    [Accept-Ranges] => bytes
    [Content-Length] => 438
    [Connection] => close
    [Content-Type] => text/html
)

You could then check it in many different ways...

if(strpos($head[0], "200") !== false){
    // site is up
}else{
etc... 

Reason I did that rather than simple == check is because they won't always have the same response. Maybe HTTP1.0 instead etc...

[DEViANCE]

@william
I don't care about this ping thing unlerss you can provide a code example, sorry to be blunt but i want to get to the bottom of this and move forward, if you can't give me a code example your not good enough at php to help me in this thread.

Thanks bennelsworth, i will look into this.

Equal to or greater than 200 and less than 300 should work.