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<?php class Foo { public $a = 1; public $b = 2; } class Bar { public $ref; } $foo = new Foo(); $bar = new Bar(); $bar->ref =& $foo->a; $bar->ref = '123'; var_dump($foo);
Output for 5.0.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
object(Foo)#1 (2) { ["a"]=> &string(3) "123" ["b"]=> int(2) }
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/SYctW on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/SYctW on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/SYctW on line 5
Process exited with code 255.