Why Do I Still See Notices Even After Disabling `display_errors` in PHP?

Silencing Notices in PHP

When encountering persistent notices like "Constant already defined" despite disabling display_errors in php.ini, it's essential to understand the problem at hand.

Suppressing Notices

To disable notices, adjust the error reporting level to E_ALL & ~E_NOTICE. This can be done using the error_reporting ini setting or the error_reporting() function.

Why Notices Matter

While notices can be annoying, they indicate potential issues in your code. For instance, defining a constant twice will result in no effect for the second definition, leaving the constant unchanged. This can lead to unexpected behavior.

Possible Causes and Solutions

In PHP 5.3, reporting call stacks upon notices is a known issue. To address this:

1. Upgrade to PHP 7 or later: This issue has been fixed in later versions of PHP.
2. Set error_reporting to E_ALL & ~E_STRICT: This will suppress notices and strict errors, reducing the noise while highlighting important errors.

Remember, notices serve a purpose by pointing out potential coding problems. Address them instead of simply silencing them to avoid future headaches.

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