Error messages in PHP

php.ini file to configure user-side output error messages

In PHP.ini, a semicolon, indicating a comment.
The types of errors that php.ini will be able to display are categorized as follows.
; (6143) E_all-All errors and warnings, (not including e_strict).
; (1) E_error-Fatal Run-time error
; (4096) E_recoverable_error-Errors that can be captured by the exception handling mechanism (CATCH/HANDLE)
; (2) E_warning-Runtime Warning (non-fatal error)
; (4) E_parse-Compile-time parse error
; (8) E_notice-Runtime hints, which are often caused by bugs in the code, may be intentional (such as using an uninitialized variable, in fact it is automatically initialized to an empty string).
; (2048) E_strict-Runtime hints that can give PHP suggestions to change your code to get the best synergy and improve code compatibility.
; (16) e_core_error-php Initializes a fatal error during startup.
; (32) E_core_warning-php Initializes a non-fatal error during startup.
; (64) E_compile_error-Fatal compilation error.
; (128) e_compile_warning– compilation error (non-fatal error).
; (256) E_user_error-User error message.
; (512) E_user_warning-User warning message.
; (1024) E_user_notice-user prompt information.

Error_reporting control the kind of message output to the client in php.ini.
error_reporting = E_all
Represents the output of all information.
error_reporting = E_all & ~e_notice Indicates the output of all errors except the hint.
error_reporting = e_compile_error| e_recoverable_error| e_error| E_core_error
Represents the output of all ERROR information.

In PHP.ini, the display_errors can set whether to output the error information set above to the client.
Display_errors = on output to client (easy to open when debugging code)
Display_errors = Off message will not be output to the client (remember to change to off when it is finally released to the user)

Thank you, Bo Master: http://hi.baidu.com/ken00821/blog/item/0839630b4619ac34b0351de1.html

Error messages in PHP