PHP While循环返回1结果应该返回15？

Question

I wrote a function that should return all users in the database. It's printing the array, but it's only printing one result. Why is it doing this? I surrounded it in a while loop and put a limit in my query...

Code:

function getAllUsers() {

global $PDO;

    $stm = $PDO->prepare("SELECT * FROM `users` ORDER BY `bid` DESC LIMIT 15");

        $stm->execute();

            while($Array = $stm->fetch()) {
                return print_r($Array);
            }

}

Answer 1

Use fetchAll() :

$data = $stm->fetchAll()
foreach ($data as $item ) {
    print_r($item);
}

Answer 2

use the foreach loop instead of the while and fetchAll() instead of the fetch():

foreach ($stm->fetchAll() as $arr) {
   print_r($arr);
}

Answer 3

function getAllUsers() {

   global $PDO;

   $stm = $PDO->prepare("SELECT * FROM `users` ORDER BY `bid` DESC LIMIT 15");
   $stm->execute();

   $var = array();

   while($Array = $stm->fetch()) {

     $var = $Array;

  }

 return $var;

 }