3v4l.org

run code in 300+ PHP versions simultaneously
<?php function createStringFromMap($map) { $chars = array('C*'); end($map); $last = key($map); for ($i = $j = $char = 0; $i <= $last; $i++) { $bit = isset($map[$i]) ? $map[$i] : 0; $char |= ($map[$i] << (7 - $j)); if (++$j === 8) { $chars[] = $char; $j = $char = 0; } } return call_user_func_array('pack', $chars); } $map = array(); $map[1] = 1; $map[9] = 1; $map[17] = 1; $map[25] = 1; echo createStringFromMap($map);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: Undefined array key 0 in /in/iEi1H on line 9 Warning: Undefined array key 2 in /in/iEi1H on line 9 Warning: Undefined array key 3 in /in/iEi1H on line 9 Warning: Undefined array key 4 in /in/iEi1H on line 9 Warning: Undefined array key 5 in /in/iEi1H on line 9 Warning: Undefined array key 6 in /in/iEi1H on line 9 Warning: Undefined array key 7 in /in/iEi1H on line 9 Warning: Undefined array key 8 in /in/iEi1H on line 9 Warning: Undefined array key 10 in /in/iEi1H on line 9 Warning: Undefined array key 11 in /in/iEi1H on line 9 Warning: Undefined array key 12 in /in/iEi1H on line 9 Warning: Undefined array key 13 in /in/iEi1H on line 9 Warning: Undefined array key 14 in /in/iEi1H on line 9 Warning: Undefined array key 15 in /in/iEi1H on line 9 Warning: Undefined array key 16 in /in/iEi1H on line 9 Warning: Undefined array key 18 in /in/iEi1H on line 9 Warning: Undefined array key 19 in /in/iEi1H on line 9 Warning: Undefined array key 20 in /in/iEi1H on line 9 Warning: Undefined array key 21 in /in/iEi1H on line 9 Warning: Undefined array key 22 in /in/iEi1H on line 9 Warning: Undefined array key 23 in /in/iEi1H on line 9 Warning: Undefined array key 24 in /in/iEi1H on line 9 @@@
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined offset: 0 in /in/iEi1H on line 9 Notice: Undefined offset: 2 in /in/iEi1H on line 9 Notice: Undefined offset: 3 in /in/iEi1H on line 9 Notice: Undefined offset: 4 in /in/iEi1H on line 9 Notice: Undefined offset: 5 in /in/iEi1H on line 9 Notice: Undefined offset: 6 in /in/iEi1H on line 9 Notice: Undefined offset: 7 in /in/iEi1H on line 9 Notice: Undefined offset: 8 in /in/iEi1H on line 9 Notice: Undefined offset: 10 in /in/iEi1H on line 9 Notice: Undefined offset: 11 in /in/iEi1H on line 9 Notice: Undefined offset: 12 in /in/iEi1H on line 9 Notice: Undefined offset: 13 in /in/iEi1H on line 9 Notice: Undefined offset: 14 in /in/iEi1H on line 9 Notice: Undefined offset: 15 in /in/iEi1H on line 9 Notice: Undefined offset: 16 in /in/iEi1H on line 9 Notice: Undefined offset: 18 in /in/iEi1H on line 9 Notice: Undefined offset: 19 in /in/iEi1H on line 9 Notice: Undefined offset: 20 in /in/iEi1H on line 9 Notice: Undefined offset: 21 in /in/iEi1H on line 9 Notice: Undefined offset: 22 in /in/iEi1H on line 9 Notice: Undefined offset: 23 in /in/iEi1H on line 9 Notice: Undefined offset: 24 in /in/iEi1H on line 9 @@@
Output for 7.3.32 - 7.3.33
@@@
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Notice: Undefined offset: 0 in /in/iEi1H on line 9 Notice: Undefined offset: 2 in /in/iEi1H on line 9 Notice: Undefined offset: 3 in /in/iEi1H on line 9 Notice: Undefined offset: 4 in /in/iEi1H on line 9 Notice: Undefined offset: 5 in /in/iEi1H on line 9 Notice: Undefined offset: 6 in /in/iEi1H on line 9 Notice: Undefined offset: 7 in /in/iEi1H on line 9 Notice: Undefined offset: 8 in /in/iEi1H on line 9 Notice: Undefined offset: 10 in /in/iEi1H on line 9 Notice: Undefined offset: 11 in /in/iEi1H on line 9 Notice: Undefined offset: 12 in /in/iEi1H on line 9 Notice: Undefined offset: 13 in /in/iEi1H on line 9 Notice: Undefined offset: 14 in /in/iEi1H on line 9 Notice: Undefined offset: 15 in /in/iEi1H on line 9 Notice: Undefined offset: 16 in /in/iEi1H on line 9 Notice: Undefined offset: 18 in /in/iEi1H on line 9 Notice: Undefined offset: 19 in /in/iEi1H on line 9 Notice: Undefined offset: 20 in /in/iEi1H on line 9 Notice: Undefined offset: 21 in /in/iEi1H on line 9 Notice: Undefined offset: 22 in /in/iEi1H on line 9 Notice: Undefined offset: 23 in /in/iEi1H on line 9 Notice: Undefined offset: 24 in /in/iEi1H on line 9 @@@
preferences:
243.52 ms | 405 KiB | 396 Q