php db new PDO mysql host 127 dbname kek root test db- query SELECT ke

<?php

$db = new PDO('mysql:host=127.0.0.1;dbname=kek', 'root', '');

$test = $db->query('SELECT `key` FROM `test`')->fetchAll();

$array = [];

foreach($test as $key => $data){
	$array[] = md5($data['key']);
}

echo json_encode($array);

?>