PHP exception handling technology, top exception handler, PHP exception handling _php Tutorial

PHP exception handling technology, top exception handler, PHP exception handling

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

The function used to define the top-level exception handler is Set_exception_handler("My_exception"); here My_expection is a developer's custom exception handler, which is a top-level exception processor, and only the top-level exception handler can handle exceptions if there are no functions in the program to handle exceptions, and if the top-level exception handler is not defined, Exceptions are handled by the system's default exception handler for example:

 
  PHP    set_exception_handler("my_expection");     function my_expection () {        echo "Here is the top exception handler"    ;    } Try {        Nohello ("Hello");    } Catch　　(Exception$e) {        throw$e;    }  function Nohello ($nohello) {         if($nohello = = " Hello ") {        　　thrownewException(" Cannot enter Hello ");    }　　 Else {            echo "input succeeded";        }    }? >

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

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