PHP Error: Exception thrown without a stack frame in Unknown on line 0[reprint],thrownstack_php Tutorial

PHP Error: Exception thrown without a stack frame in Unknown on line 0[reprint],thrownstack

From: NetEase Blog

As far as I know, in both cases PHP will report Exception thrown without a stack frame in Unknown on line 0 error:

1) Abnormal capture with Set_exception_handler guide, exception inside perform another exception

As in the following code, this problem occurs:

http://de.php.net/manual/de/function.set-exception-handler.php#88082

  function  Error_Handler ( $code ,  $message ,  $file ,  $line  ) {  if  (0 = =  error_reporting   ())  return  ;   throw   new  errorexception ( $message , 0,  $code ,  $file ,  $line  );}   function  exception_handler ( $e  ) { //  ... normal exception Stuff goes here   print   $undefined ; //  This is the underlying problem  }   set_error_handler  ("Error_Handler" );   Set_exception_handler  ("Exception_handler" );   throw   New   Exception  ("Just Invoking the exception handler"); 

Print $undefined in the Exception_handler function; the line itself throws an exception, and he goes back to calling Set_exception_handler's Exception_handler function, which is a dead loop.

Workaround: Do not perform another exception in one exception

The above problem can be used in a try ... catch way, such as exception_handler change to the following:

function exception_handler ($e) {    try    {        //  ... normal exception stuff goeshere        print$undefined// This is the Underlying problem    }    catch (Exception$e)    {         Print Get_class ($e). " Thrown within the exception handler. Message: ". $e->getmessage (). "On line". $e-GetLine ();    }}

2) Throwing an exception in a destructor

Refer to this bug:http://bugs.php.net/bug.php?id=33598

The following code will report this error:

class Test {    function  __construct () {        echo "construct\n";    }     function greet () {        echo "Hello world\n";    }      function __destruct () {        echo "destruct\n";         Throw New Exception (' Test ' );}    } $test New test (); $test->greet ();

Current Solutions:

1. Do not throw an exception in a destructor.

2. Because the destructor is executed at exit, manually unset the kind and catch the exception.

For example above, in the last add a line unset ($test), then the program will be reported throw new Exception (' Test '); This line has errors, and then catch this exception on the line.

The above two cases will appear in PHP 5.2.11, as for reasons I think PHP may be this way, PHP bug 33598 in 2005, the bug status is closed, stating that the official does not think that this is a bug, or improper handling of a bug.

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