错误处理try catch

<?php
function inverse($x) {
    if (!$x) {
        throw new Exception('被除数不能为0');
    }
    if ($x>31) {
        throw new Exception('月数不能大于31');
    }
    return 1/$x;
}

try
{
    echo inverse(5) . "<hr>";
    echo inverse(10) . "<hr>";
    echo inverse(2) . "<hr>";
    echo inverse(0) . "<hr>";
}
catch (Exception $e)
{
    echo '错误提示: ',  $e->getMessage(), "<hr>";
}

?>