PHP error handling technology, top-level error processor

PHP exception handling technology, top-level exception handler

PHP handles exceptions like Java, with Try{}catch () {}

The function used to define the top-level exception handler is

Set_exception_handler ("My_exception");

The my_expection here is a developer-defined exception handler, a top-level exception processor that handles exceptions only if there are no functions in the program to handle exceptions, and if the top-level exception handler is not defined, the system defaults the exception handler to handle the exception

To illustrate:

 PhpSet_exception_handler("My_expection"); functionmy_expection () {Echo"This is the top exception handler"; }    Try{Nohello ("Hello"); }Catch(Exception $e){        Throw $e; }functionNohello ($nohello) {if($nohello= = "Hello") {Throw New Exception("Cannot Enter Hello"); }Else{            Echo"Input succeeded"; }    }?>

Reprinted from: http://blog.sina.com.cn/s/blog_641d5693010121cr.html

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