3v4l.org

run code in 300+ PHP versions simultaneously
<?php $temps = [ 0 => [ 0 => "user", 1 => "address", 2 => "detail", 3 => "name", 4 => "family", ], 1 => [ 0 => "user", 1 => "address", ], 2 => [ 0 => "user", 1 => "address", 2 => "detail", 3 => "name", ], ]; $result = array_map(function($temp){ return (count($temp) > 2 ? [implode(".", array_slice($temp, 0, -1)), end($temp)] : $temp); },$temps); print_r($result);die;
Output for 7.1.25 - 7.1.30, 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 - 8.2.19, 8.3.0 - 8.3.7
Array ( [0] => Array ( [0] => user.address.detail.name [1] => family ) [1] => Array ( [0] => user [1] => address ) [2] => Array ( [0] => user.address.detail [1] => name ) )
preferences:
95.14 ms | 404 KiB | 171 Q