3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [ 'radios1' => [ 'on' ], 'from' => [ '', 'Bangalore', '', '', ] ]; array_walk($array, function (&$value, $key) { $value = array_values(array_filter($value)); }); print_r($array);
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Array ( [radios1] => Array ( [0] => on ) [from] => Array ( [0] => Bangalore ) )

preferences:
107.28 ms | 1421 KiB | 4 Q