How to define error level in php.ini

How to define the error level in php.ini: First open the configuration file php.ini; then check the default value of the error reporting level error_reporting and modify "error_reporting=E_ALL & ~E_NOTICE".

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

How to define the error level in php.ini? How to set the error reporting level in php

1. Modify the PHP configuration file php.ini

After setting error_reporting in this way, restart the web server and it will take effect permanently.

Open the configuration file php.ini and check the default value of error reporting level error_reporting, as follows:

error_reporting=E_ALL & ~E_DEPRECATED & ~E_STRICT

It means to report all errors, except E_DEPRECATED and E_STRICT.

Modify it to:

error_reporting=E_ALL &  ~E_NOTICE

It means reporting all errors except E_NOTICE. This is also the most commonly used error reporting level. It will not report errors of the attention class (such as using an undefined variable).

Save it and it will take effect after restarting the web server.

2. Use the error_reporting() function

After setting in this way, it can take effect immediately. But only in the area behind the error_reporting() function call in the current script.

int error_reporting ([ int $level ] )

The parameter can be an integer or the corresponding constant identifier. It is recommended to use the constant form. The return value is the value (integer value) of the error reporting level in effect at the current location.

The following are some error reporting levels:

值          常量                     说明
1           E_ERROR             报告导致脚本终止运行的致命错误
2           E_WARNING           报告运行时的警告类错误（脚本不会终止运行）
4           E_PARSE             报告编译时的语法解析错误
8           E_NOTICE            报告通知类错误，脚本可能会产生错误
32767 E_ALL 报告所有的可能出现的错误（不同的PHP版本，常量E_ALL的值也可能不同） error_reporting(E_ALL ^E_NOTICE); // 除了E_NOTICE之外，报告所有的错误 error_reporting(E_ERROR); // 只报告致命错误 echo error_reporting(E_ERROR | E_WARNING | E_NOTICE); // 只报告E_ERROR、E_WARNING 和 E_NOTICE三种错误

Note: The default value of display_errors in the configuration file php.ini is On, which means error prompts are displayed. If set to Off, all Error message.

Use error_reporting(0) or add @ in front of the function to suppress error output to prevent error messages from leaking sensitive information

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