3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class Foo { public $x; } $a = new Foo(); $b = new Foo(); $a->x = $b; $b->x = $a; print_r($a == $b); ?>
Output for 5.0.0 - 5.3.29, 5.4.12 - 5.6.28, 7.0.0 - 7.1.0
Fatal error: Nesting level too deep - recursive dependency? in /in/TnuYb on line 11
Process exited with code 255.
Output for hhvm-3.12.0
Fatal error: infinite recursion detected in /in/TnuYb on line 11
Process exited with code 255.
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.4.0 - 5.4.11

Process exited with code 139.
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/TnuYb 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/TnuYb 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/TnuYb on line 4
Process exited with code 255.