3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array(1,2,3,4,5,6,7,8,9,10); $key = 2; $a = array(1,2,'foo'=>3,4,5,6,7,8,9,10); $key = '2'; foreach (new LimitIterator(new CallbackFilterIterator(new InfiniteIterator(new ArrayIterator($a)), function($v, $k) use ($key) { static $good = false; $good |= $k === $key; return $good; }), 0, count($a)) as $k => $v) { echo "$k => $v\n"; }
Output for 5.4.0 - 7.1.0

Process exited with code 137.
Output for 5.3.0 - 5.3.29
Fatal error: Class 'CallbackFilterIterator' not found in /in/qeG9A on line 6
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/qeG9A 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_FUNCTION in /in/qeG9A on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/qeG9A on line 6
Process exited with code 255.