PHP error types and Shielding methods

Php

Types of errors and shielding methods

1.

Note

Notices

）

These are small and not serious errors,

For example, to access a variable that is not defined.

Usually

This type of error is

Not prompt to the user, but sometimes these errors can affect the results of the run.

2.

Warning

Warnings

）

This is a slightly more serious mistake,

For example, to include

Include ()

A file that does not exist itself.

Such a mistake

The information is prompted to the user, but does not cause the program to terminate running.

3.

Fatal Error (

Fatal errors

）

These are serious mistakes,

For example, if you want to initialize an object of a class that doesn't exist,

or call a non-existent

function, these errors can cause the program to stop running,

Php

will also show these errors to the user.

Different types of errors include:

E_error

: It is usually displayed and the program execution is interrupted.

E_warning

: It is usually displayed but does not interrupt the execution of the program.

E_notice

: A code error that occurred while the script was running correctly.

E_parse

: Syntax parsing error.

E_core_error

: In

Php

A fatal error occurred at startup.

E_core_warning

: Reports on

Php

A non-fatal error occurred at startup.

E_compile_error

: A fatal error occurred at compile time, indicating a script error.

E_user_error

: User-generated error message.

E_user_warning

: User-generated warning message.

E_user_notice

: User-raised note message.

E_strict

: Encoding normalization warning, error during run time.

E_recoverable_error

: Near-fatal run-time error, if not captured

E_error

。

E_all

: Captures all errors and warnings.

Shielding

Php

Error hints

Method One: Before a function that is likely to fail, add

@,

And then

Or Die ("")

Such as:

@mysql_connect (...) or Die ("Database Connect Error")

Method Two: Edit

Ini

Find

"Display_errors ="

Will

=

The following value changes to

"Off

。

Method Three: In

Php

Script before adding

Error_reporting (0)

To block all error prompts.

which

Error_reporting

Configure the level of error message return.

Grammar:

int error_reporting (int [level]);

return value: Integer

Function Type:

Php

System functions

PHP error types and Shielding methods