How to catch Exceptions?

[Eddcapone]

I tried to load an element by class, but it was not found and I get

PHPWebDriver_UnhandledWebDriverError in WebDriverBase.php line 50:
Cannot find matching element locator to: class

How can I even catch this error and do something?

I tried it like this:

use PHPWebDriver_WebDriver;
use PHPWebDriver_WebDriverException;
use PHPWebDriver_UnhandledWebDriverError;

...

    try {
        return $this->driver->element($using, $value);

    } catch(UnhandledWebDriverError $exception) {
            exit("UnhandledWebDriverError: $exception");
    }

But the catch is not executed.

[Eddcapone]

I had to use "PHPWebDriver_UnhandledWebDriverError" instead of "UnhandledWebDriverError "