note 24904 added to language.variables.scope

Be careful when using static vars inside classes. They don't have the behavior you expect when dealing with more than one instance of the class. Their values remain across instances, which I think is wrong, but, hey, who’s me? Example: Class xpto { function some() { static $x = 0; echo $x; ++$x; } } $i1 = new xpto; $i1->some(); $i2 = new xpto; $i2->some(); First call to some(), using $il, will display 0 and add 1 to $x Second call to some(), using $il2, will display 1, not 0 (value of $x remains across instances) Static vars are not independent. They are shared by every instance of an object!!! If you need to overcome this, create an intermediary method, which will send a reset parameter to some(), so that the method knows it is a new instance: Class xpto { function some($reset) { static $x = 0; if($reset) $x=0; echo $x; ++$x; } function some_before() { $this->some(true); } } $i1 = new xpto; $i1->some_before(); $i2 = new xpto; $i2->some_before(); -- http://www.php.net/manual/en/language.variables.scope.php http://master.php.net/manage/user-notes.php?action=edit+24904 http://master.php.net/manage/user-notes.php?action=delete+24904 http://master.php.net/manage/user-notes.php?action=reject+24904