How does PHP set the error reporting level?

In our program development, we often encounter program running errors. PHP will give different prompts based on the program error level. For example, what warnings, errors, and other errors can be set. if there are only some small errors, we can prevent them from being reported. This requires the setting of PHP error levels described in this chapter. In our program development, we often encounter program running errors. PHP will give different prompts based on the program error level. For example, what warnings, errors, and other errors can be set. if there are only some small errors, we can prevent them from being reported. This requires the setting of PHP error levels described in this chapter.

In PHP, there are two ways to set the error level:

First: After error_reporting is set in this mode, the web server will take effect permanently after it is restarted.

Take the xampp integrated software package as an example. open the configuration file php. ini and check the default value of Error Report level error_reporting, as shown below:

Error_reporting = E_ALL &~ E_DEPRECATED &~ E_STRICT

It indicates reporting all errors, except E_DEPRECATED and E_STRICT.

Modify it:

Error_reporting = E_ALL &~ E_NOTICE

This indicates reporting all errors, except for E_NOTICE. This is also the most common error reporting level. it does not report errors of the attention class (for example, using undefined variables.

Save and restart the web server.

Method 2: Use the error_reporting () function to set the error level. after setting the error level, the setting takes effect immediately. However, it is limited to the following areas after the error_reporting () function call in the current script.

The syntax of the error_reporting () function is as follows:

int error_reporting ([ int $level ] )

The level parameter specifies the error level. if it is not set, the current error level is returned. Below is the value of the level parameter.

Value	Constant	Description
1	E_ERROR	Fatal error reported resulting in script termination
2	E_WARNING	Report warning errors during running (the script will not stop running)
4	E_PARSE	Report syntax parsing errors during compilation
8	E_NOTICE	Reports a notification error. the script may generate an error.
16	E_CORE_ERROR	A fatal error occurs during PHP initialization.
32	E_CORE_WARNING	Warning during PHP initialization (non-fatal error ).
64	E_COMPILE_ERROR	Fatal errors during compilation. This is like an E_ERROR generated by the Zend script engine.
128	E_COMPILE_WARNING	Compile-time warning (non-fatal error ). This is like an E_WARNING warning generated by the Zend script engine.
256	E_USER_ERROR	Custom warning messages. This is like an E_WARNING warning set by the programmer by using the PHP function trigger_error)
512	E_USER_WARNING	Custom warning messages. This is like an E_WARNING warning set by the programmer by using the PHP function trigger_error)
1024	E_USER_NOTICE	Custom warning messages. This is like an E_WARNING warning set by the programmer by using the PHP function trigger_error)
2048	E_STRICT	Code Standardization warning. PHP is allowed to recommend how to modify the code to ensure the best interoperability forward compatibility.
4096	E_RECOVERABLE_ERROR	A fatal error occurs when an ECS instance is started. This is like an E_ERROR, but it can be captured through user-defined processing (see set_error_handler ())
8191	E_ALL	All errors and warnings (excluding E_STRICT) (E_STRICT will be part of E_ALL as of PHP 6.0)

The following code disables user-defined errors and warnings, performs some operations, and then restores the original error level:

A simple example is:

Error_reporting (E_ERROR | E_WARNING | E_PARSE | E_NOTICE );

It indicates php errors, warnings, syntax errors, and prompts.

The above is how PHP sets the error level? For more information, see other related articles in the first PHP community!