Given this code?

Code:
$data = array('08/23'); // Note that there is no yyyy, only mm/dd.
list($dia, $mes, $ano) = explode('/', $data);
How can I use a try catch to avoid breaking my application in case
explode() finds only two (or even one) piece? I ask because simply doing

Code:
try {
    list($dia, $mes, $ano) = explode('/', $data);
}
catch (Exception $e) {
    // ...
}
I cannot catch the exception. Why?