PHP error level

Error_reporting (report_level) is often used to debug your own programs when developing PHP. The possible values ​​of report_level are listed below:

Example: The above introduces the PHP error level, including the content. I hope it will be helpful to friends who are interested in PHP tutorials.

Value	Constant	Description
1	E_ERROR	This is a serious error and cannot be recovered, such as location exception, insufficient memory, etc.
2	E_WARNING	Warning, the most general error, such as function parameter error, etc.
4	E_PARSE	The error occurs when parsing a PHP file and forces PHP to exit before execution. The E_NOTICE notification indicates that some unknown variables may be manipulated, etc. Notifications can be turned on during development to ensure that the program is "safely notified". In the official system, notifications should be turned off
16	E_CORE_ERROR	This internal error is caused by the failure of PHP to load the extension, and Will cause PHP to stop running and exit
32	E_CORE_WARNING	Warning (non-fatal error) during the initialization process when PHP starts up
64	E_COMPILE_ERROR	The compilation error occurs during compilation. This error occurs during compilation. Errors will cause PHP to exit
128	E_COMPILE_WARNING	Compilation warnings are used to tell users some deprecated syntax information
256	E_USER_ERROR	User-defined errors will cause PHP to exit, which is It comes from PHP itself, but from the script file.
512	E_USER_WARNING	Scripts use this to notify of an execution failure, and PHP will also use E_WARNING to notify
1024	E_USER_NOTICE	User-defined notifications are used to indicate possible errors in scripts
2048	E_STRICT	Encoding standardization warning (recommended how to modify for forward compatibility)
4096	E_RECOVERABLE_ERROR	Near-fatal runtime error, if not caught it will be treated as E_ERROR
8191	E_ALL	All errors except E_STRICT (8191 in PHP6, that is, all included)