3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = [0 => 'foobar', 1 => 'some_condition']; foreach ($arr as $k=>$v) { if ('some_condition' == $v) { unset($arr[$k]); } } var_dump($arr);
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 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
array(1) { [0]=> string(6) "foobar" }
preferences:
197.6 ms | 404 KiB | 296 Q