Максим

select COLUMN_TYPE from information_schema.columns where table_schema='db_name' and table_name='table_name' and COLUMN_NAME='numbers'"

array(1) {
  [0]=>
  array(1) {
    ["COLUMN_TYPE"]=>
    string(78) "enum('Queued','Delayed','Processing','Completed','Paused','Error','Cancelled')"
  }
}

$var="User";
$dbh=new PDO("mysql:host=localhost;dbname=database;","root","");
$stmt=$dbh->prepare("UPDATE `users` SET user=:var");
$stmt->bindParam(":var",$var);
$stmt->execute();