Bug #16245 Updated: Static variables into class member funtions have wrong scope

ID: 16245 Updated by: sander@php.net Reported By: flying@dom.natm.ru Status: Open -Bug Type: Class/Object related +Bug Type: Documentation problem Operating System: Windows 2000 PHP Version: 4.1.1 New Comment: I guess this is expected behaviour. Reclassified as a documentation problem. (BTW you can use global $cnt to overcome this problem) Previous Comments: ------------------------------------------------------------------------ [2002-03-24 11:28:51] flying@dom.natm.ru Static variables inside member functions of a classes have wrong scope. They should belong to each instance of a class, like normal class properties, but they're belong to class definition instead and, therefore, shared between every instance of this class. It makes static variables unusable into class member variables. Here is an example: // Define class class A { var $id = null; function A($id) { $this->id = $id; } function func() { // Here we have counter into static variable static $cnt; if (!$cnt) $cnt = 0; // Show counter value and ID of a class instance echo $this->id.": ".($cnt++)."\n"; } }; // Create 2 instances of our class with different IDs $a = new A('A'); $b = new A('B'); // Call method of each class instance twice and see, // what will happen $a->func(); $b->func(); $a->func(); $b->func(); Expected results: ----------------- A: 0 B: 0 A: 1 B: 1 Actual results: --------------- A: 0 B: 1 A: 2 B: 3 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=16245&edit=1