Bug->Doc #66079 [Asn]: Exception constructor might ignore default arguments when overriden

Edit report at https://bugs.php.net/bug.php?id=66079&edit=1 ID: 66079 Updated by: cmb@php.net Reported by: cmbecker69 at gmx dot de Summary: Exception constructor might ignore default arguments when overriden Status: Assigned -Type: Bug +Type: Documentation Problem Package: Scripting Engine problem Operating System: irrelevant PHP Version: Irrelevant Assigned To: cmb Block user comment: N Private report: N New Comment: We can't easily change the current behavior for BC reasons, so I'm switching to doc bug. Previous Comments: ------------------------------------------------------------------------ [2013-11-11 21:55:39] cmbecker69 at gmx dot de Description: ------------ When overriden, calling the constructor of class Exception ignores the default arguments, if the properties $code and $message are already set. From looking at the implementation of the constructor[1], the behavior is to be expected, because when the default values are passed for $code and $message, zend_update_property_*() is not called. I am fully aware that the given test script shows a bad programming practise, but it would work for user defined classes, and the unusual behavior of the Exception constructor doesn't seem to be documented. At least this should be done, IMHO. [1] <http://lxr.php.net/xref/PHP_5_5/Zend/zend_exceptions.c#223> Test script: --------------- // cf. <http://3v4l.org/3Ylvi#v430> class MyException extends Exception { function __construct() { $this->code = 42; $this->message = "foo"; parent::__construct(); } } try { throw new MyException(); } catch (MyException $e) { var_dump($e->getCode()); var_dump($e->getMessage()); } Expected result: ---------------- int(0) string(0) "" Actual result: -------------- int(42) string(3) "foo" ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=66079&edit=1