3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function foo() { $array = array("1", "2"); foreach ($array as $value) { yield null => $value; } } foreach (foo() as $id => $value) { var_dump($id, $value); }
based on 3urL5
Output for 5.5.24 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
NULL string(1) "1" NULL string(1) "2"
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected 'null' (T_STRING) in /in/30JXS on line 6
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected T_STRING in /in/30JXS on line 6
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_STRING in /in/30JXS on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/30JXS on line 6
Process exited with code 255.