How to set error_reporting error reporting level in PHP

Error reporting level: Specifies under what circumstances errors in the script code (errors here are generalized errors, including E_NOTICE, E_WARNING, E_ERROR fatal errors, etc.) will be output in the form of an error report.

How to set the error reporting level:

1. Modify the PHP configuration file php.ini

After setting error_reporting in this way, restart the web server and it will take effect permanently.

Taking the xampp integrated software package as an example, open the configuration file php.ini and check the default value of error reporting level error_reporting, as follows:

error_reporting=E_ALL & ~E_DEPRECATED & ~E_STRICT

means reporting all errors, But except for E_DEPRECATED and E_STRICT.

Modify it to:

error_reporting=E_ALL & ~E_NOTICE

means to report all errors except E_NOTICE. This is also the most commonly used error reporting level. It will not report errors of the attention class (such as using an undefined variable).

Save and it will take effect after restarting the web server.

2. Use the error_reporting() function

After setting in this way, it can take effect immediately. But only in the area behind the error_reporting() function call in the current script.

int error_reporting ([ int $level ] )

The parameter can be an integer or the corresponding constant identifier. It is recommended to use the constant form. The return value is the value (integer value) of the error reporting level in effect at the current location.

Here are some error reporting levels:

Value                                                   ’s ’ ’s ’ ’ s ‐ ‐ ‐ ‐ ‐‐‐‐ ‐ to report a fatal error that caused the script to terminate.

2 E_WARNING Report warning errors during runtime (the script will not terminate the run)

4 E_PARSE Report syntax parsing errors during compilation

8 E_NOTICE Report notification errors, scripts may generate errors

32767 E_ALL Report all possible errors (different PHP versions, the value of the constant E_ALL will also May be different)

error_reporting(E_ALL ^ ​​E_NOTICE); // Report all errors except E_NOTICE

error_reporting(E_ERROR); // Only report fatal errors

echo error_reporting(E_ERROR | E_WARNING | E_NOTICE ); // Only E_ERROR, E_WARNING and E_NOTICE are reported.

Note: The default value of display_errors in the configuration file php.ini is On, which means error prompts are displayed. If set to Off, all error prompts will be turned off.

The above introduces how to set the error_reporting error reporting level in PHP, including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.