$_FILES['input_name']['name']

<?php 
 
$connect = mysql_connect('127.0.0.1', 'root', 'pass');
mysql_select_db('ejemplo', $connect);
 
function ejemplo_while($str){
$sql = mysql_query($str);
while($row = mysql_fetch_array($sql, MYSQL_NUM))
   {
      $result[] = $row[0];
   }
   return $result;
}
 
$sql = ejemplo_while('select id from ejemplo');
print_r($sql);
 
 
?>

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
)

<?php 
 
$connect = mysql_connect('127.0.0.1', 'root', 'password');
mysql_select_db('ejemplo', $connect);
 
$sql = mysql_query('select id from ejemplo');
 
while($row = mysql_fetch_array($sql, MYSQL_NUM))
   {
      print_r($row);
   }
 
 ?>

Array
(
    [0] => 1
)
Array
(
    [0] => 2
)
Array
(
    [0] => 3
)

<?php 
 
$connect = mysql_connect('127.0.0.1', 'root', 'pass');
mysql_select_db('ejemplo', $connect);
 
$sql = mysql_query('select id from ejemplo');
 
if($row = mysql_fetch_array($sql, MYSQL_NUM))
   {
      print_r($row);
   }
 
 ?>

Array
(
    [0] => 1
)

<?php 
 
$array[] = 'asa';
$array[] = 5656;
$array[] = 1515.545;
 
print_r($array);
 
?>

Array
(
    [0] => asa
    [1] => 5656
    [2] => 1515.545
)