php shield error

php error types and shielding methods

1. Notices

These are relatively small and not serious errors, such as accessing an undefined variable. Usually, such errors are not prompted to the user, but sometimes these errors will affect the results of the operation.

2. Warnings

This is a slightly more serious error, for example, trying to include include() A file that does not exist by itself. Such an error message will be prompted to the user, but will not cause the program to terminate.

3. Fatal errors

These are serious errors. For example, if you want to initialize a file that does not exist at all, An object of a class, or calling a non-existent function. These errors will cause the program to stop running, and PHP will also

display these errors to the user.

Different error types

E_ERROR

: Usually displayed, program execution will also be interrupted.

E_WARNING

: Usually displayed, but will not interrupt program execution.

E_NOTICE

: Code error that occurs when the script is running normally.

E_PARSE

: Syntax parsing error.

E_CORE_ERROR

: Fatal error occurred during PHP startup.

E_CORE_WARNING

: Reports non-fatal errors that occur when PHP starts.

E_COMPILE_ERROR

: Fatal error that occurs during compilation, indicating the error in the script.

E_USER_ERROR

: User-generated error message.

E_USER_WARNING

: Warning message generated by the user.

E_USER_NOTICE

: Attention message caused by the user.

E_STRICT

: Encoding standardization warning, error that occurs at runtime.

E_RECOVERABLE_ERROR

: A near-fatal runtime error. If not caught, it will be treated as E_ERROR.

E_ALL

: Catch all errors and warnings.

Shield error prompts:

Method 1: Add @ before the function that may cause errors, and then or die("")

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

Method 2: Edit php.ini, search for "display_errors=", and change the value after "=" to "off.

Method 3: In Add error_reporting(0) before the php script to block all error prompts.

Among them, error_reporting configures the level of error information reporting.

Syntax: int error_reporting(int [level ]);

Return value: integer

Function type: PHP system function

Recommended tutorial:

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