error_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>