3v4l.org

run code in 500+ PHP versions simultaneously
<?php $arr =[ 0 => [ 'id' => 11, 'title' => 't1' ], 1 => [ 'id' => 12, 'title' => 't2' ] ]; $fianl_array = array_combine(array_column($arr,'id'),$arr); print_r($fianl_array);

preferences:
43.05 ms | 1154 KiB | 5 Q