mysql row into array for ajax checking

[richrock]

Hi,

 

I'm trying to figure out how to use this ajax checking to find out if a number exists :

 

$getReceipts = "SELECT receipt_num FROM trans_receipts";
$resReceipts = mysql_query($getReceipts) or die('Receipt query failed: ' .mysql_error());
$row_receipts = mysql_fetch_array($resReceipts);
$numbers = $row_receipts['receipt_num'];

echo $row_receipts;
//this varible contains the array of existing users
$existing_users=array($numbers); 
//value got from the get metho
$user_name=$_POST['newreceiptnumber'];

 

But I always get a positive response, so I know it's something to do with the array.  Bit of a n00b still with these, but I guarantee I'll learn from this.

 

Anyway, I just need to get those $numbers to the array, the rest will work I'm sure...