php try catch嵌套详解编程语言

<?php 
try { 
 
    dsss(); 
       throw new Exception("555"); 
} catch (Exception $e) { 
    echo $e->getMessage(); 
    // die(); // 终止异常 
} 
function dsss() 
{ 
    try { 
        $num1 = 3; 
        $num2 = 0; 
        if ($num2 == 0) { 
            throw new Exception("111"); 
        } else { 
            $res = $num1 / $num2; 
        } 
 
    } catch (Exception $e) { 
        echo $e->getMessage(); 
        // die(); // 终止异常 
    } 
}