note 57570 added to language.oop5

This isn't explicity noted anywhere, I don't think. If you use a variable after the "->" part of a class attribute call, it will parse the variable as a string to assign/compare that class attribute: <?php class User { var $test; var $test2; } $user1 = new User(); $user2 = new User(); $user1->test = "user1's test"; $user1->test2 = "user1's test2"; $user2->test = "user2's test"; $user2->test2 = "user2's test2"; print_r($user1); print_r($user2); foreach($user1 as $key => $value) $user2->$key = $value; print_r($user1); print_r($user2); ?> Which outputs: User Object: user1 [test] => user1's test [test2] => user1's test2 User Object: user2 [test] => user2's test [test2] => user2's test2 User Object: user1 [test] => user1's test [test2] => user1's test2 User Object: user2 [test] => user1's test [test2] => user1's test2 This is particularly useful when you want to assign a different instance of the same class to $this- I have a standard method that I call when I need to do that: <?php function assignToThis($new) { foreach($new as $key => $value) $this->$key=$value; } ?> ---- Manual Page -- http://www.php.net/manual/en/language.oop5.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+57570 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+57570&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+57570&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+57570&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+57570&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+57570&report=yes&reason=non-english Delete: already in docs -- http://master.php.net/manage/user-notes.php?action=delete+57570&report=yes&reason=already+in+docs Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+57570&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+57570&report=yes Search -- http://master.php.net/manage/user-notes.php