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<?php class a { function overWrite() { $tmp = &$this; $tmp = new b; var_dump($tmp); } } class b { } $a = new a; $a->overWrite(); var_dump($a);
Output for 5.0.0 - 7.1.0
object(b)#2 (0) { } object(a)#1 (0) { }
Output for 4.3.0 - 4.4.9
object(b)(0) { } object(b)(0) { }