HIOX PHP Tutorials - Error Levels, Setting error level

Topic

What are the different error levels supported in php?
or
What is the use of error levels?

Explanation

There are error levels in php with the help of which we can specify the type of error messages that should be displayed. Say we want only warning messages or compile errors to be displayed we will use the function error_reporting().

Code Used: e.g:
error_reporting(E_WARNING | E_COMPILE_ERROR);

To use error levels you should know when a type of error will occur. Here we have given the different message types supported by php.

Different Error Types:

Name	Bit Value	Note
E_ERROR	1	Fatal Errors that will halt script execution
E_WARNING	2	Non fatal Runtime Errors.
E_PARSE	4	Error generated by parser.
E_NOTICE	8	Run-time notices
E_CORE_ERROR	16	Error during PHP's initial startup
E_CORE_WARNING	32	Warning during PHP's initial startup
E_COMPILE_ERROR	64	Error generated by zend
E_COMPILE_WARNING	128	Warning generated by zend
E_USER_ERROR	256	Error generated by user using trigger_error() function
E_USER_WARNING	512	Warning generated by user using trigger_error() function
E_USER_NOTICE	1024	Notice generated by user using trigger_error() function
E_ALL	2047	Defines all messages except E_STRICT
E_STRICT	2048

A basic user will not bother too much about error levels as he would use either 0 or E_ALL for error_reporting().

Next >> Error mailing or redirecting error messages to file.

Error Levels in PHP