How to block all errors in php.ini

How to block all errors in php.ini: 1. Open the "php.ini" configuration file and search for the "display_errors" item in it; 2. Set the value of the "display_errors" item to "Off". All PHP error reporting can be turned off, thereby blocking all errors.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

Shield all errors in php.ini Method:

Open the php.ini configuration file, search for display_errors in it, and then set the value of display_errors to Off to turn off all PHP error reports. As shown below:

; This directive controls whether or not and where PHP will output errors,
; notices and warnings too. Error output is very useful during development, but
; it could be very dangerous in production environments. Depending on the code
; which is triggering the error, sensitive information could potentially leak
; out of your application such as database usernames and passwords or worse.
; For production environments, we recommend logging errors rather than
; sending them to STDOUT.
; Possible Values:
;   Off = Do not display any errors
;   stderr = Display errors to STDERR (affects only CGI/CLI binaries!)
;   On or stdout = Display errors to STDOUT
; Default Value: On
; Development Value: On
; Production Value: Off
; http://php.net/display-errors
display_errors = Off

This method should be the most thorough solution, because it applies to all PHP files.

Extended knowledge: Other ways to mask errors

• Use the error control operator: @

PHP supports the use of the error control operator @. Place it before a PHP expression and any error messages the expression may produce will be ignored.

If a custom error handling function is set with set_error_handler(), this error handling function will still be called, and if @ is used before the error statement, the error handling function will return 0.

It should be noted that the @ operator is only valid for expressions. Simply put, if you can get a value from somewhere, you can add the @ operator in front of it. For example, the @ operator can be used before variables, functions, include calls, constants, etc., but it cannot be placed before the definition of a function or class, nor can it be used before conditional structures such as if and foreach statements. The

@ operator is also effective for serious errors that can cause the program to terminate. This means that if @ is used to suppress the error message before a function call that does not exist or has the wrong letter, the program will Die there without any hint.

[Example] Use the @ error control operator to mask errors in the code.

<?php
    $link = @mysqli_connect("127.0.0.1", "my_user", "my_password", "my_db") or die(&#39;数据库连接失败！&#39;);
?>

The running results are as follows:

数据库连接失败！

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