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

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

functionError_Handler ($code,$message,$file,$line){    if(0 = =error_reporting())        return; Throw NewErrorexception ($message, 0,$code,$file,$line);}functionException_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:

functionException_handler ($e){    Try    {        //... normal exception stuff goes here        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:

classTest {function__construct () {Echo"Construct\n"; }    functiongreet () {Echo"Hello world\n"; }     function__destruct () {Echo"Destruct\n"; Throw New Exception(' Test ' ); }}$test=Newtest ();$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.