php中error_reporting函數用法詳解

基本資料

E_NOTICE 表示一般情形不記錄，只有程式有錯誤情形時才用到，例如企圖存取一個不存在的變數，或是呼叫 stat() 函數檢視不存在的檔案。
E_WARNING 通常都會顯示出來，但不會中斷程式的執行。這對除錯很有效。例如：用有問題的Regex呼叫 ereg()。
E_ERROR 通常會顯示出來，亦會中斷程式執行。意即用這個遮罩無法追查到記憶體配置或其它的錯誤。
E_PARSE 從文法中解析錯誤。
E_CORE_ERROR 類似 E_ERROR，但不包括 PHP 核心造成的錯誤。
E_CORE_WARNING 類似 E_WARNING，但不包括 PHP 核心錯誤警告。

例子:

error_reporting = E_ALL & ~E_NOTICE ; 顯示所有的錯誤，除了提醒
error_reporting = E_COMPILE_ERROR|E_ERROR|E_CORE_ERROR ; 僅顯示錯

error_reporting=E_ERROR :只會報告致命性錯誤

基本上設定

error_reporting = E_ALL & ~E_NOTICE ; 顯示所有的錯誤，除了提醒

例子

代碼如下

複製代碼

error_reporting(0);   // Report simple running errors error_reporting(E_ERROR | E_WARNING | E_PARSE);   // Reporting E_NOTICE can be good too (to report uninitialized // variables or catch variable name misspellings ...) error_reporting(E_ERROR | E_WARNING | E_PARSE | E_NOTICE);   // Report all errors except E_NOTICE // This is the default value set in php.ini error_reporting(E_ALL ^ E_NOTICE);   // Report all PHP errors (bitwise 63 may be used in PHP 3) error_reporting(E_ALL);   // Same as error_reporting(E_ALL); ini_set('error_reporting', E_ALL);

整數。表示舊的PHP的錯誤層級。(Returns the old error_reporting level.)
手冊上的例子：

Value	Constant	Description	Note
1	E_ERROR (integer)	Fatal run-time errors. These indicate errors that can not be recovered from, such as a memory allocation problem. Execution of the script is halted.
2	E_WARNING (integer)	Run-time warnings (non-fatal errors). Execution of the script is not halted.
4	E_PARSE (integer)	Compile-time parse errors. Parse errors should only be generated by the parser.
8	E_NOTICE (integer)	Run-time notices. Indicate that the script encountered something that could indicate an error, but could also happen in the normal course of running a script.
16	E_CORE_ERROR (integer)	Fatal errors that occur during PHP’s initial startup. This is like an E_ERROR, except it is generated by the core of PHP.	since PHP 4
32	E_CORE_WARNING (integer)	Warnings (non-fatal errors) that occur during PHP’s initial startup. This is like an E_WARNING, except it is generated by the core of PHP.	since PHP 4
64	E_COMPILE_ERROR (integer)	Fatal compile-time errors. This is like an E_ERROR, except it is generated by the Zend Scripting Engine.	since PHP 4
128	E_COMPILE_WARNING (integer)	Compile-time warnings (non-fatal errors). This is like an E_WARNING, except it is generated by the Zend Scripting Engine.	since PHP 4
256	E_USER_ERROR (integer)	User-generated error message. This is like an E_ERROR, except it is generated in PHP code by using the PHP function trigger_error().	since PHP 4
512	E_USER_WARNING (integer)	User-generated warning message. This is like an E_WARNING, except it is generated in PHP code by using the PHP function trigger_error().	since PHP 4
1024	E_USER_NOTICE (integer)	User-generated notice message. This is like an E_NOTICE, except it is generated in PHP code by using the PHP function trigger_error().	since PHP 4
2048	E_STRICT (integer)	Run-time notices. Enable to have PHP suggest changes to your code which will ensure the best interoperability and forward compatibility of your code.	since PHP 5
4096	E_RECOVERABLE_ERROR (integer)	Catchable fatal error. It indicates that a probably dangerous error occured, but did not leave the Engine in an unstable state. If the error is not caught by a user defined handle (see also set_error_handler()), the application aborts as it was an E_ERROR.	since PHP 5.2.0
8191	E_ALL (integer)	All errors and warnings, as supported, except of level E_STRICT in PHP < 6.	6143 in PHP 5.2.x and 2047 previously