What are the php error levels?

error_reporting()

## is used to set the PHP error reporting level and return the current level. (PHP 4, PHP 5) (Recommended learning:

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function can set the error_reporting directive at runtime.

PHP has many error levels. Use this function to set the level when the script is running.

If the optional parameter level is not set, error_reporting() will only return the current error reporting level.

Deprecated 最低级别错误，程序继续执行 Notice 通知级别的错误 如直接使用未声明变量，程序继续执行 Warning 警告级别的错误，可能得不到想要的结果 Fatal error 致命级别错误致命级别错误，程序不往下执行 parse error 语法解析错误，最高级别错误，连其他错误信息也不呈现出来 E_USER_相关错误 用户设置的相关错误

How to set the error level?

error_reporting(-1) displays all errors, error_reporting(0) masks all errors

. ini_set('error_reporting',0) also masks all errors.

Error_reporting can be set in the php.ini file to make the script display or not display certain errors. ini_set('display_errors','On') displays errors.

Note: error_reporting() sets what kind of errors are reported, and ini_set('display_errors','On') sets whether errors are output. Thus error_reporting(-1) and ini_set('display_errors',0) can be used to set the log: errors are reported and not output.

Example:

error_reporting(E_ALL&~E_NOTICE)不显示通知级别的错误。“~”表示非。

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