在PHP中所有的報錯信息可以用error_reporting()這個函數來設置：它的參數有字符串和數字兩種表示方法，共14個等級，但是呢，我看使用其他數字貌似也可以，起初我以為它指的是一定的報錯區間，后來，終于發現了其中的規律： 復制代碼 代碼如下:error_reporting( 7 ) = error_reporting( 1+2+4)= error_reporting(E_ERROR | E_WARING | E_PARSE)現在，我將其總結如下： 致命錯誤，腳本執行中斷，就是腳本中有不可識別的東西出現 舉例： Error：Invalid parameters. Invalid parameter name 部分代碼出錯，但不影響整體運行 舉例： Warning: require_once(E:/include/config_base.php) 字符、變量或結束的地方寫規范有誤 舉例：Parse error: syntax error, unexpected $end in 一般通知，如變量未定義等 舉例：Notice: Undefined variable: p in E:/web/index.php on line 17 error_reporting 變量的默認值是 E_ALL & ~E_NOTICE 開發時，最佳的值為： E_ALL | E_STRICT如果設置為：error_reporting(E_ALL | E_STRICT)，則表示記錄所有的錯誤信息 可能會導致網站出現一大堆的錯誤代碼；但是對于程序員來說應該說是一件好事，可以把代碼優化到最優； 一些非致命性錯誤雖然不影響程序的運行，但是會加重PHP的負擔. 最后，曬出英文版的對照表： E_ERROR Fatal run-time errors. Errors that can not be recovered from. Execution of the script is halted E_PARSE Compile-time parse errors. Parse errors should only be generated by the parser E_NOTICE Run-time notices. The script found something that might be an error, but could also happen when running a script normally E_CORE_WARNING Non-fatal errors at PHP startup. This is like an E_WARNING in the PHP core E_COMPILE_ERROR Fatal compile-time errors. This is like an E_ERROR generated by the Zend Scripting Engine E_COMPILE_WARNING Non-fatal compile-time errors. This is like an E_WARNING generated by the Zend Scripting Engine E_USER_ERROR Fatal user-generated error. This is like an E_ERROR set by the programmer using the PHP function trigger_error() E_USER_WARNING Non-fatal user-generated warning. This is like an E_WARNING set by the programmer using the PHP function trigger_error() E_USER_NOTICE User-generated notice. This is like an E_NOTICE set by the programmer using the PHP function trigger_error() E_STRICT Run-time notices. PHP suggest changes to your code to help interoperability and compatibility of the code 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()) E_ALL All errors and warnings, except level E_STRICT (E_STRICT will be part of E_ALL as of PHP 6.0)PHP教程
