PHP error_reporting() 函数
定义和用法：error_reporting() 设置PHP的报错级别并返回当前级别。
语法：error_reporting(report_level)
如果参数 level 未指定，当前报错级别将被返回。下面几项是 level 可能的值：
值
常量
描述
1
E_ERROR
Fatal run-time errors. Errors that can not be recovered from. Execution of the script is halted
2
E_WARNING
Non-fatal run-time errors. Execution of the script is not halted
4
E_PARSE
Compile-time parse errors. Parse errors should only be generated by the parser
8
E_NOTICE
Run-time notices. The script found something that might be an error, but could also happen when running a script normally
16
E_CORE_ERROR
Fatal errors at PHP startup. This is like an E_ERROR in the PHP core
32
E_CORE_WARNING
Non-fatal errors at PHP startup. This is like an E_WARNING in the PHP core
64
E_COMPILE_ERROR
Fatal compile-time errors. This is like an E_ERROR generated by the Zend Scripting Engine
128
E_COMPILE_WARNING
Non-fatal compile-time errors. This is like an E_WARNING generated by the Zend Scripting Engine
256
E_USER_ERROR
Fatal user-generated error. This is like an E_ERROR set by the programmer using the PHP function trigger_error()
512
E_USER_WARNING
Non-fatal user-generated warning. This is like an E_WARNING set by the programmer using the PHP function trigger_error()
1024
E_USER_NOTICE
User-generated notice. This is like an E_NOTICE set by the programmer using the PHP function trigger_error()
2048
E_STRICT
Run-time notices. PHP suggest changes to your code to help interoperability and compatibility of the code
4096
E_RECOVERABLE_ERROR
Catchable fatal error. This is like an E_ERROR but can be caught by a user defined handle (see also set_error_handler())
8191
E_ALL
All errors and warnings, except level E_STRICT (E_STRICT will be part of E_ALL as of PHP 6.0)
例子
任意数目的以上选项都可以用“或”来连接（用 OR 或 |），这样可以报告所有需要的各级别错误。例如，下面的代码关闭了用户自定义的错误和警告，执行了某些操作，然后恢复到原始的报错级别：
<?php
//禁用错误报告
error_reporting(0);
//报告运行时错误
error_reporting(E_ERROR | E_WARNING | E_PARSE);
//报告所有错误
error_reporting(E_ALL);
error parse new?
>

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