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run code in 150+ php & hhvm versions
Bugs & Features
<?php class foo { public $pub = 'Pub'; protected $prot = 'Prot'; private $priv = 'Priv'; } $foo = new foo; $var = array($foo); $foo->pub = $var; var_dump($var);
Output for 7.0.0 - 7.1.0
array(1) { [0]=> object(foo)#1 (3) { ["pub"]=> array(1) { [0]=> *RECURSION* } ["prot":protected]=> string(4) "Prot" ["priv":"foo":private]=> string(4) "Priv" } }
Output for 5.3.0 - 5.3.2, hhvm-3.12.0
array(1) { [0]=> object(foo)#1 (3) { ["pub"]=> array(1) { [0]=> object(foo)#1 (3) { ["pub"]=> *RECURSION* ["prot":protected]=> string(4) "Prot" ["priv":"foo":private]=> string(4) "Priv" } } ["prot":protected]=> string(4) "Prot" ["priv":"foo":private]=> string(4) "Priv" } }
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.3.3 - 5.6.28
array(1) { [0]=> object(foo)#1 (3) { ["pub"]=> *RECURSION* ["prot":protected]=> string(4) "Prot" ["priv":"foo":private]=> string(4) "Priv" } }
Output for 5.2.14 - 5.2.17
array(1) { [0]=> object(foo)#1 (3) { ["pub"]=> *RECURSION* ["prot:protected"]=> string(4) "Prot" ["priv:private"]=> string(4) "Priv" } }
Output for 5.0.0 - 5.2.13
array(1) { [0]=> object(foo)#1 (3) { ["pub"]=> array(1) { [0]=> object(foo)#1 (3) { ["pub"]=> *RECURSION* ["prot:protected"]=> string(4) "Prot" ["priv:private"]=> string(4) "Priv" } } ["prot:protected"]=> string(4) "Prot" ["priv:private"]=> string(4) "Priv" } }
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/AKmY3 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/AKmY3 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/AKmY3 on line 5
Process exited with code 255.