<?php
try {

dsss();
} catch (Exception $e) {

echo $e->getMessage();
// die(); // 终止异常
}
function dsss()
{
try {
$num1 = 3;
$num2 = 0;
if ($num2 == 0) {
throw new Exception("11321");
} else {
$res = $num1 / $num2;
}

} catch (Exception $e) {
throw $e;
}
}
?>