3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [1,2,3]; $array2 = &$array; foreach($array as $val) { unset($array[1]); // modify array being iterated over echo "{$val} - ", current($array), PHP_EOL; }
Output for 7.0.0 - 7.0.31, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
1 - 1 2 - 1 3 - 1
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.38
1 - 3 3 -
preferences:
211.37 ms | 402 KiB | 318 Q