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From: Arno Welzel <usenet@arnowelzel.de>
Newsgroups: comp.lang.php
Subject: Re: set_error_handler(): duplicate error
Date: Wed, 16 Jun 2021 13:48:06 +0200
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alex:

> <?php
> //error_reporting(0);
> set_error_handler(
>      static function (int $severity, string $message, string $file, int 
> $line): void {
>          throw new InternalErrorException($message, 0, $severity, $file, 
> $line);
>      }
> );
> 
> xxx();
> 
> Output:
> 
> Fatal error: Uncaught Error: Call to undefined function xxx() in 
> /tmp/tmp.Ie1UVhkWcT/test.php on line 9
> 
> Error: Call to undefined function xxx() in /tmp/tmp.Ie1UVhkWcT/test.php 
> on line 9
> 
> Call Stack:
>      0.0001     392928   1. {main}() /tmp/tmp.Ie1UVhkWcT/test.php:0
> 
> Why error message showing is duplicate?

I can't reproduce this. When I run this script with PHP 7.4 as CLI, I
only get the expected result:

PHP Fatal error:  Uncaught Error: Call to undefined function xxx() in
D:\test-errorhandler.php:11
Stack trace:
#0 {main}
  thrown in D:\test-errorhandler.php on line 11

Do you run the above script within a larger application which already
has some kind of error handling in place?


-- 
Arno Welzel
https://arnowelzel.de