Req #49203 [Opn->Fbk]: call_user_func_array when calling a parent constructor not from a user class

Edit report at http://bugs.php.net/bug.php?id=49203&edit=1 ID: 49203 Updated by: jani@php.net Reported by: magicaltux@php.net Summary: call_user_func_array when calling a parent constructor not from a user class -Status: Open +Status: Feedback Type: Feature/Change Request -Package: Feature/Change Request +Package: Scripting Engine problem Operating System: Linux x86_64 PHP Version: 5.3.0 Block user comment: N Private report: N New Comment: What is the FR here? Re-type if this is actually a bug. And rewrite the summary, it isn't very informative. And update PHP version if this is still an issue. Previous Comments: ------------------------------------------------------------------------ [2009-08-10 08:29:09] magicaltux@php.net Ok, mysqli's contructor is not named "__construct" Method [ <internal:mysqli, ctor> public method mysqli ] { } Still, one would expect that calling call_user_func_array(array('parent', '__construct'), ...) acts the same as parent::__construct(...) (which works). I guess somewhere the call to __construct must be redirected to the ctor... ------------------------------------------------------------------------ [2009-08-10 07:48:18] colder@php.net The problem is not about internal classes, but classes not defining a __construct: class A { } class B extends A { public function __construct() { echo "here\n"; call_user_func(array('parent', '__construct')); } } $x = new B; seems like is_callable() returns true on array('parent', '__construct') and shouldn't. ------------------------------------------------------------------------ [2009-08-10 03:57:09] magicaltux@php.net Description: ------------ When using: call_user_func_array(array('parent', '__construct'), $var); This works if the parent is a user-defined class, but not if it's an extension-provided class (the extended constructor gets called twice). This is not easy to explain, see attached reproduce code for more details. My initial code was (in a class extending mysqli): private function __construct($params) { call_user_func_array(array('parent', '__construct'), $params); $this->set_charset('utf8'); } Using this instead awfully fixes the problem: parent::__construct($params[0], $params[1], $params[2], $params[3]); Note that this wasn't possible in PHP 5.2.x Warning: call_user_func_array(): First argument is expected to be a valid callback, 'parent::__construct' was given in foo.php on line 5 Reproduce code: --------------- <?php class B extends mysqli { public function __construct($var) { echo "here\n"; call_user_func_array(array('parent', '__construct'), $var); } } $x = new B(array('localhost', 'root')); Expected result: ---------------- here Actual result: -------------- here here Warning: call_user_func_array() expects parameter 2 to be array, string given in foo.php on line 6 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=49203&edit=1