simple_try_catch.php

<?php

class MyCustomException extends Exception { }

function throwMyCustomException() {
    throw new MyCustomException('There is something wrong.');
}

try {
    throwMyCustomException();
} catch (MyCustomException $e) {
    echo "Your custom exception caught ";
    echo $e->getMessage();
} catch (Exception $e) {
    echo "PHP base exception caught";
}