error_reporting()

error_reporting() — Sets which PHP errors are reported.

Built-in function of PHP 8.5. The manual lists it as available in PHP 4, PHP 5, PHP 7, PHP 8. This page is the reference card: signature, parameters and return value, plus the changelog and the example the manual provides.

What it does

The error_reporting() function sets the error_reporting directive at runtime. PHP has many levels of errors, using this function sets that level for the duration (runtime) of your script. If the optional error_level is not set, error_reporting() will just return the current error reporting level.

Signature

error_reporting(?int $error_level = null): int

Parameters

Parameter	Type	What it takes
$error_level	?int	The new error_reporting level. It takes on either a bitmask, or named constants. Using named constants is strongly encouraged to ensure compatibility for future versions. As error levels are added, the range of integers increases, so older integer-based error levels will not always behave as expected.

Return value

Returns the error_reporting level, before it is changed to error_level. Note: The error control @-operator changes the error_level during error handling. The error control @-operator changes the error_level during error handling.

Example

A runnable snippet:

// Turn off all error reporting error_reporting(0); // Report simple running errors error_reporting(E_ERROR | E_WARNING | E_PARSE); // Reporting E_NOTICE can be good too (to report uninitialized // variables or catch variable name misspellings ...) error_reporting(E_ERROR | E_WARNING | E_PARSE | E_NOTICE); // Report all errors except E_NOTICE error_reporting(E_ALL & ~E_NOTICE); // Report all PHP errors error_reporting(E_ALL); // Report all PHP errors error_reporting(-1); // Same as error_reporting(E_ALL); ini_set('error_reporting', E_ALL);

Changelog

Version	Change
8.0.0	error_level is nullable now.