Error_reporting () error levels

During PHP Development, error_reporting (report_level) is often used to debug your program. The possible values of report_level are listed below.

During PHP Development, error_reporting (report_level) is often used to debug your program. The possible values of report_level are listed below.

Value	Constant	Description
1	E_ERROR	This is a serious error and cannot be recovered, such as a location exception or insufficient memory.
2	E_WARNING	Warning: The most common error, such as a function Parameter error.
4	E_PARSE	Parsing error, generated when parsing the PHP file, and forced PHP to exit before execution
8	E_NOTICE	An announcement indicates that some unknown variables may be operated. You can enable the notice during development to ensure that the program is "security notice". in the official system, the notice should be closed.
16	E_CORE_ERROR	This internal error is caused by PHP loading expansion failure, and may cause PHP to stop running and exit.
32	E_CORE_WARNING	Warning during PHP initialization (non-fatal error)
64	E_COMPILE_ERROR	A compilation error occurs during compilation, which causes PHP to exit.
128	E_COMPILE_WARNING	The compile warning is used to tell the user some unrecommended syntax information.
256	E_USER_ERROR	A user-defined error will lead PHP to exit. it is from PHP itself, but from the script file.
512	E_USER_WARNING	The script uses it to notify a failed execution, and PHP also uses E_WARNING to notify
1024	E_USER_NOTICE	User-defined announcements are used to indicate possible errors in the script
2048	E_STRICT	Code Standardization warning (how to modify to forward compatibility)
4096	E_RECOVERABLE_ERROR	Near fatal runtime error. if not captured, it is considered as E_ERROR.
8191	E_ALL	All errors except E_STRICT (8191 in PHP6, that is, all errors are included)

Example:

Any number of the above options can be connected with "OR" (OR |), so that all required levels of errors can be reported. For example, the following code disables user-defined errors and warnings, performs some operations, and then restores to the original error level:
 

PHP code

2. // Disable error reporting
3. Error_reporting (0 );
5. // Report running errors
6. Error_reporting (E_ERROR | E_WARNING | E_PARSE );
8. // Report all errors
9. Error_reporting (E_ALL );
11. Error_reporting (7 );
12. Set php error detection level
13. E_ERROR-fatal runtime error (1)
14. E_WARNING-runtime warning (non-fatal error) (2)
15. E_PARSE-parsing error during compilation (4)
16. 1 + 2 + 4 = 7
18. ?>