error_reporting and find error in php program

阅读量:24
2021-04-17

代码

                  

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 ?>

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:

              

                      

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 ); ?>

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