Share an example tutorial of error_reporting function in PHP

This article mainly introduces the relevant information about the detailed introduction of the error_reporting function in PHP. Friends who need it can refer to it

Detailed introduction to the usage of error_reporting function in PHP

The error_reporting function is used to handle errors in PHP. The most common one is error_reporting(E_

ALL ^ E_NOTICE). What does this mean? Below we analyze the error_reporting function in detail.

Definition Usage

error_reporting() Sets PHP’s error reporting level and returns the current level.

Syntax

If the parameter report_level is not specified, the current error level will be returned. The following items are possible values ​​for report_level:

ValueDescription1E_ERRORFatal runtime error. Unrecoverable error. Stop executing the script. 2E_WARNINGNon-fatal runtime error. The execution of the script does not stop. 4E_PARSECompile time error. 8E_NOTICERuntime reminder. 16E_CORE_ERRORFatal error when starting PHP. This is like an E_ERROR32E_CORE_WARNING in the PHP core, a non-fatal error when PHP starts. This is like an E_WARNING warning in PHP core64E_COMPILE_ERRORfatal compile-time error. This is like an E_ERROR128E_COMPILE_WARNINGnon-fatal compile-time error generated by the Z script engine , an E_WARNING warning was generated by the Zend script engine##256USER_ERROR512102420484096##8191E_ALLAll errors except E_STRICTPHP does not enable errors by default, so you need to configure the php.ini file:

	Constant
	end
E_	User-defined fatal error
E_USER_WARNING	User-defined warning (non-fatal error)
E_USER_NOTICE	User-defined reminder (often a bug, maybe intentional)
E_STRICT	Encoding standardization warning (recommend how to modify for forward compatibility)
E_RECOVERABLE_ERROR	Near-fatal runtime error if If not caught, it is treated as E_ERROR

Change
display

_

errors = Off to display_errors = OnIn addition, the error level must be configured, because PHP displays all errors by default, and we do not need some harmless prompts, so the settings are as follows:

error_reporting = E_ALL changed to error_reporting = E_ALL & ~E_NOTICE

Example of use in PHP code:

Tip: Any number of the above options can be used "or" Concatenate (with OR or |) so that all required error levels are reported. For example, the following code turns off user-defined errors and warnings, performs certain operations, and then returns to the original error level:

To understand how the error_reporting function is used, see error_reporting(E_ALL ^ E_NOTICE) This code means to display all

error messages

except E_NOTICE.

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