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HomeBackend DevelopmentPHP Tutorialerror_reporting and find error in php program

代码

                  <p class="sycode">                      <?     php      /*     开启php.ini中的display_errors指令,只有该指令开启如果有错误报告才能输出     */           ini_set     (     '     display_errors     '     ,     1     );       /*     通过error_reporting()函数设置在本脚本中,输出所有级别的错误报告     */           error_reporting     (     E_ALL     );      /*     “注意(notice)”的报告,不会阻止脚本的执行,并且可能不一定是一个问题      */           getType     (     $var     );      //     调用函数时提供的参数变量没有在之前声明                /*     “警告(warning)”的报告,指示一个问题,但是不会阻止脚本的执行      */           getType     ();      //     调用函数时没有提供必要的参数                /*     “错误(error)”的报告,它会终止程序,脚本不会再向下执行      */      get_Type();      //     调用一个没有被定义的函数                ?>                       </p>

Description: 1.error_reporting () to set PHP's error-level and return to the current level. Its scope is the current page

                   2.Display_errors directive in php.ini open, only the instruction to open the output if there is an error report

 

 

 

语法

error_reporting(report_level)

If the parameter level is not specified, the current error level will be returned. The following is the level of several possible values:

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)

Examples

Any number of the above options can be used "or"to connect (with OR or |), so that all required to report the level of error. For example, the following code to turn off the user-defined errors and warnings, the implementation of certain operations, and then return to the original error level:

              <p class="sycode">                  <pre class="sycode" name="code">                      <p class="sycode">                          <?      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      );      ?>                      </p>
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