<?
function ank($a = false){
global $db;
$b = $db ->prepare('SELECT * FROM `user` WHERE `id` = ?');
$b -> execute ([$a]);
$ank = $b -> fetch(PDO::FETCH_ASSOC);
return $ank;
}
<?
ank($user['id'])
<?
ank($user['id'])
echo ''.$ank['login'].'';
$ank = ank($user['id'])