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run code in 150+ php & hhvm versions
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<?php class A { private $y = 5; } $a = new A; $a->x = array($a); $a->zzz = array($a); print_r($a);
Output for 5.3.0 - 5.6.28, 7.0.0 - 7.1.0
A Object ( [y:A:private] => 5 [x] => Array ( [0] => A Object *RECURSION* ) [zzz] => Array ( [0] => A Object *RECURSION* ) )
Output for hhvm-3.10.0 - 3.13.2
A Object ( [y:A:private] => 5 [x] => Array ( [0] => A Object ( [y:A:private] => 5 [x] => Array ( [0] => Array *RECURSION* ) [zzz] => Array ( [0] => Array *RECURSION* ) ) ) [zzz] => Array ( [0] => A Object ( [y:A:private] => 5 [x] => Array ( [0] => Array *RECURSION* ) [zzz] => Array ( [0] => Array *RECURSION* ) ) ) )
Output for 5.0.0 - 5.2.17
A Object ( [y:private] => 5 [x] => Array ( [0] => A Object *RECURSION* ) [zzz] => Array ( [0] => A Object *RECURSION* ) )
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/oKRMi on line 4
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/oKRMi on line 4
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/oKRMi on line 4
Process exited with code 255.