Question

I have a simple script that makes redirection to mobile version of a website if it finds that user is browsing on mobile phone. It uses Tera-WURFL webservice to acomplish that and it will be placed on other hosting than Tera-WURFL itself. I want to protect it, in case of Tera-WURFL hosting downtime. In other words, if my script takes more than a second to run, then stop executing it and just redirect to regular website. How to do it effectively (so that the CPU would not be overly burdened by the script)?

EDIT: It looks that TeraWurflRemoteClient class have a timeout property. Read below. Now I need to find how to include it in my script, so that it would redirect to regular website in case of this timeout.

Here is the script:

// Instantiate a new TeraWurflRemoteClient object
$wurflObj = new TeraWurflRemoteClient('http://my-Tera-WURFL-install.pl/webservicep.php');

// Define which capabilities you want to test for. Full list: http://wurfl.sourceforge.net/help_doc.php#product_info
$capabilities = array("product_info");

// Define the response format (XML or JSON)
$data_format = TeraWurflRemoteClient::$FORMAT_JSON;

// Call the remote service (the first parameter is the User Agent - leave it as null to let TeraWurflRemoteClient find the user agent from the server global variable)
$wurflObj->getCapabilitiesFromAgent(null, $capabilities, $data_format);

// Use the results to serve the appropriate interface
if ($wurflObj->getDeviceCapability("is_tablet") || !$wurflObj->getDeviceCapability("is_wireless_device") || $_GET["ver"]=="desktop") {
    header('Location: http://website.pl/'); //default index file
} else {
header('Location: http://m.website.pl/'); //where to go
}
?>

And here is source of TeraWurflRemoteClient.php that is being included. It has optional timeout argument as mentioned in documentation:

// The timeout in seconds to wait for the server to respond before giving up
$timeout = 1;

Answer 1

TeraWurflRemoteClient class have a timeout property. And it is 1 second by default, as I see in documentation.
So, this script won’t be executed longer than a second.