How to customize error handling in php

php custom error handling method: You can use the set_error_handler() function to achieve this. This function can set a user-defined error handling function, such as [set_error_handler("my_define_error")].

Custom error handling:

When an error occurs, we handle it ourselves and set an error handling function.

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set_error_handler() function sets the user-defined error handling function.

Syntax:

set_error_handler(errorhandler,E_ALL|E_STRICT);

Parameters:

• errorhandler Required. Specifies the name of the user error handling function.

• E_ALL|E_STRICT Optional. Specifies what error reporting level is displayed for user-defined errors. The default is "E_ALL".

##For example: set_error_handler("my_define_error");

Then define the function and set the error handling in detail in the function.

Grammar:

function my_define_error(errCode,errCode,errCode,errMsg,errFile,errFile,errFile,errLine){
    函数内部写入处理错误的代码
}

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Note: The order of this formal parameter is specified, and is The function will be called uniformly by the system and the actual parameter data will be transmitted.

Note: Custom errors can only handle "non-fatal errors", which means they cannot handle E_ERROR errors.

Code implementation:

<?php // 用户定义的错误处理函数
 function myErrorHandler($errno, $errstr, $errfile, $errline) {
     echo "<b>Custom error:</b> [$errno] $errstr<br>";
     echo " Error on line $errline in $errfile<br>";
 } // 设置用户定义的错误处理函数
 set_error_handler("myErrorHandler");

 $test=2; // 触发错误
 if ($test>1) {
     trigger_error("A custom error has been triggered");
 }
 ?>

Output result:

Custom error: [1024] A custom error has been triggered
 Error on line 14 in C:\webfolder\test.php

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