checkout for timeout or live second count, in php script execution

[dsaba]

Hello I am trying to test whether a proxy is working or not with cURL. cURL is a php libarary that gives you a set of functions/constants to be able to send custom headers to websites, POST to websites.etc.. And more importantly surf the site or grab its content under a proxy, instead of the server's own IP address.

 

I have a list of proxies, and the problem is they don't all work, I want to test to see if they work with a curl function, that loads a google search page and then checks to see if it was loaded. The problem is this "test" works fine when a proxy does work, however when a proxy doesn't work the script lags, and ends up timing out trying to load the google page, because the proxy does not work. Therefore I want to to verify somehow if I can't load the page in so many seconds,(let's say 20 seconds) then it must mean that the proxy doesn't work. How can I check to see if the page doesn't load or if the script execution is in so many seconds while it executing itself? Is there some way I can access a live timer.. or some neat algorithim to check for this... ? This is my question/problem.

 

Here is my function that uses cURL to check if a proxy works or not:

 

<?php
function curl_checkproxy($proxy) 		{
$url = 'http://www.google.com/search?hl=en&safe=off&rls=TSHA%2CTSHA%3A2005-20%2CTSHA%3Aen&q=machiavelli';
$curlsource = curl_init();
curl_setopt($curlsource, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($curlsource, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curlsource, CURLOPT_HTTPPROXYTUNNEL, 1);
curl_setopt($curlsource, CURLOPT_PROXY, $proxy);
curl_setopt($curlsource, CURLOPT_URL, $url);
$raw = curl_exec($curlsource);

$findm = preg_match_all('/<title>(.*?)<\/title>/', $raw, $resultArray);
$m =trim($resultArray[1][0]);
if ($m == 'machiavelli - Google Search') {
return TRUE;
} else {
return FALSE;
}
}
?>

 

 

Again I somehow need to determine in how many seconds it tries to load the page, if its more than 20 I can just return FALSE.. How would this be possible??

 

Thank you.