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error_reporting: hide the warnings


rick645
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Go to solution Solved by Barand,

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$ php -v
PHP 8.1.2-1ubuntu2.10 (cli) (built: Jan 16 2023 15:19:49) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.1.2, Copyright (c) Zend Technologies
    with Zend OPcache v8.1.2-1ubuntu2.10, Copyright (c), by Zend Technologies
$ cat entry-point.php 
<?php

error_reporting(E_ALL & ~E_WARNING & ~E_USER_WARNING);

class C {
	final private function m() {}
}
$ php entry-point.php 
PHP Warning:  Private methods cannot be final as they are never overridden by other classes in /tmp//entry-point.php on line 6

Ok, the appropriate WARNING appears.
However, since there is error_reporting(...) instruction, it should not appear.
Why do you appear?

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error_reporting() won't help you if there is an error detected while parsing the file that the code is in. In this case, since there is no other file where you could put the function call, set the error reporting you want with a CLI option.

You know what's even better though? Fixing the problem the warning is telling you about.

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$ cat entry-point.php 
<?php
var_dump(ini_get('error_reporting'));
class C {
	final private function m() {}
}
$ cat php.ini 
error_reporting = E_ALL & ~E_WARNING & ~E_USER_WARNING
$ php entry-point.php 
PHP Warning:  Private methods cannot be final as they are never overridden by other classes in /tmp//entry-point.php on line 4
string(5) "22527"


Comprehensible!!!

$ php -c php.ini entry-point.php

Warning: Private methods cannot be final as they are never overridden by other classes in /tmp//entry-point.php on line 4
string(5) "32253"

Now I do not understand...

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Your problem is this line: 

9 minutes ago, rick645 said:
final private function m() {}

A private function is accessible only within the class in which it is defined (your class, "C"). 

A final function is one that is known to subclasses (of "C"), but those subclasses are not permitted to override that function. 

Since a private function is not known to subclasses, it cannot be meaningfully marked as final, hence the Warning. 

 

Either remove the final modifier or change the "private" modifier to "protected". 
Protected functions are known to subclasses and, by default, can be overridden by those subclasses. 

 

Neither private nor protected functions are available to any other class. 
See also Visibility in the Documentation. 

 

Regards, 
   Phill  W.

 

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  • Solution

The point is that that your code to set the error reporting level is not being executed.

When you run a PHP script is is first parsed for errors (startup errors). If none are found the script is then executed (and your error reporting code will be executed) but, as in this case, if errors are found your code is not executed.

This was pointed out to you by requinix earlier...

1 hour ago, requinix said:

error_reporting() won't help you if there is an error detected while parsing the file that the code is in.

 

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