在函数中捕获异常，在try-catch中调用。不起作用，为什么？

问题描述：

I'm trying to call a function inside try block and if it fails, catch an exception. My code doesn't work right, what am I doing wrong? Sorry, I'm new on exceptions. Anybody? Any help appreciated :D

What I tried and what doesn't works:

function check ($func) {
    try {
        call_user_func($func);
    } catch (Exception $e) {
        echo "An error occurred.";
    }
}

function test () {
    echo 4/0;
}

check("test");

Returns just "INF" and "Division by zero" error, but should catch that exception and return "An error occurred."

我正在尝试调用try块中的函数，如果失败，则捕获异常。我的代码不正常，我做错了什么？对不起，我是新的例外。任何人？任何帮助表示赞赏：D p>

我尝试了什么，什么不起作用： p>

  函数检查（$ func）{
尝试{
 call_user_func（$ func）; 
} catch（异常$ e）{
 echo“发生错误。”; 
} 
} 
 
 
函数测试 （）{
 echo 4/0; 
} 
 
check（“test”）; 
  code>  pre> 
 
 返回“INF”和“除以零”  “错误，但应该捕获该异常并返回”发生错误。“ p> 
  div>

答

Trying to throw an object that is not will result in a PHP Fatal Error using set_exception_handler().

For more details -

1- https://www.php.net/manual/en/language.exceptions.php#language.exceptions.catch

2- https://www.php.net/manual/en/class.errorexception.php

Try the below code, now error will go to catch.

   function exception_error_handler($severity, $message, $file, $line) {
    if (!(error_reporting() & $severity)) {
        // This error code is not included in error_reporting
        return;
    }

    if($message == 'Division by zero'){
        throw new DivisionByZeroError('Division By Zero Error');
    }else{
        throw new ErrorException($message, 0, $severity, $file, $line);
    }
}

set_error_handler("exception_error_handler");



function check ($func) {
    try {
        call_user_func($func);
    } 


    catch (DivisionByZeroError $e) {
        echo "An Division error occurred - ".$e->getMessage(); //$e->getMessage() will deisplay the error message
    }


    catch (Exception $e) {
        echo "An error occurred - ".$e->getMessage(); //$e->getMessage() will deisplay the error message
    }
}

function test () {


    echo 4/0;

}

check("test");

在函数中捕获异常，在try-catch中调用。 不起作用，为什么？

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在函数中捕获异常，在try-catch中调用。不起作用，为什么？