3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function gen_map($f, $iter) { foreach ($iter as $k => $v) { yield $k => $f($v); } } // example: function times_two($x) { return $x * 2; } $source = new ArrayIterator([0, 1, 2, 3, 4, 5, 6]); //var_dump(iterator_to_array(iter_map('times_two', $source))); print_r(iterator_to_array(gen_map('times_two', $source)));
Output for 5.5.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [0] => 0 [1] => 2 [2] => 4 [3] => 6 [4] => 8 [5] => 10 [6] => 12 )
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected '$k' (T_VARIABLE) in /in/Yqhs5 on line 5
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_VARIABLE in /in/Yqhs5 on line 5
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_VARIABLE in /in/Yqhs5 on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/Yqhs5 on line 5
Process exited with code 255.