; Error Level Constants:

; E_ALL - All errors and warnings (includes E_STRICT as of PHP 5.4.0)

; E_ALL 所有错误和警告(除E_STRICT外)


; E_ERROR - fatal run-time errors

; E_ERROR 致命的错误。脚本的执行被暂停。


; E_RECOVERABLE_ERROR - almost fatal run-time errors

; E_RECOVERABLE_ERROR 大多数的致命错误。


; E_WARNING - run-time warnings (non-fatal errors)

; E_WARNING 非致命的运行时错误,只是警告,脚本的执行不会停止。


; E_PARSE - compile-time parse errors

; E_PARSE 编译时解析错误,解析错误应该只由分析器生成。


; E_NOTICE - run-time notices (these are warnings which often resultfrom a bug in your code, but it's possible that it wasintentional (e.g., using an uninitialized variable andrelying on the fact it's automatically initialized to anempty string)

; E_NOTICE 脚本运行时产生的提醒(往往是我们写的脚本里面的一些bug,比如某个变量没有定义),这个错误不会导致任务中断。


; E_STRICT - run-time notices, enable to have PHP suggest changesto your code which will ensure the best interoperabilityand forward compatibility of your code

; E_STRICT 脚本运行时产生的提醒信息,会包含一些php抛出的让我们要如何修改的建议信息。


; E_CORE_ERROR - fatal errors that occur during PHP's initial startup

; E_CORE_ERROR 在php启动后发生的致命性错误


; E_CORE_WARNING - warnings (non-fatal errors) that occur during PHP's nitial startup

; E_CORE_WARNING 在php启动后发生的非致命性错误,也就是警告信息


; E_COMPILE_ERROR - fatal compile-time errors

; E_COMPILE_ERROR php编译时产生的致命性错误


; E_COMPILE_WARNING - compile-time warnings (non-fatal errors)

; E_COMPILE_WARNINGphp编译时产生的警告信息


; E_USER_ERROR - user-generated error message

; E_USER_ERROR 用户生成的错误


; E_USER_WARNING - user-generated warning message

; E_USER_WARNING 用户生成的警告


; E_USER_NOTICE - user-generated notice message

; E_USER_NOTICE 用户生成的提醒

; E_DEPRECATED - warn about code that will not work in future versionsof PHP


; E_USER_DEPRECATED - user-generated deprecation warnings



& 表示并且
~ 表示非
| 表示或者

比如: error_reporting=E_ALL & ~E_NOTICE表示错误级别为E_ALL 并且除了E_NOTICE