3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = [1, 2, 3, 4, 5, 6]; for ($i = 0; $i < count($arr); $i++) { unset($arr[$i - 1]); var_dump($arr[$i]); } echo "===", PHP_EOL; $arr = [1, 2, 3, 4, 5, 6]; foreach ($arr as $i => $v) { unset($arr[$i - 1]); var_dump($arr[$i]); }
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
int(1) int(2) int(3) int(4) === int(1) int(2) int(3) int(4) int(5) int(6)

preferences:
83.01 ms | 406 KiB | 5 Q