mysql - PHP _GET issue not refreshing data on multiple tries

I have a php script that is triggered from my app. This script uses the GET method to retrieve information from the url and put it into a database. I have got it to work so far except for the fact when I try to do multiple requests.

For example, I did a test where every time I would take the name of the database from the GET, put it into the appropriate database, retrieve the last entry, and then it would add 7 each time and echo it to the screen/put it back into the database as the newest number. I tried this within my browser hitting refresh every time and the first time it worked. Second time I hit refresh, it gave me the same results as the first time. I kept trying but same result so I closed the browser and tried it again. It worked as it should.

So the problem I think has to do with the script not receiving the connection the second, third, fourth... time around. It seems to only work the first time. I thought this was an issue with the data being cached but I turned off cache within the php script.

Can someone please tell me why it only works on the first attempt?

Thanks

EDITED WITH CODE

header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT"); 
header("Cache-Control: no-store, no-cache, must-revalidate"); 
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");

checkToken();

function checkToken ()
{



$username='XXXXX';
$password='XXXXX';
$database='Push';


$passed= $_GET['token'];


$pieces = explode(" ", $passed); /*Contains two pieces of information.  
                                       First is for the correct table and 
                                       and the second is the actually data 
                                       that will be put into the tables*/
$search= $pieces[1];

$table= $pieces[0];

echo $table." ".$search;

 $db= new mysqli('localhost', $username, $password, $database);

if (mysqli_connect_errno())
{
    echo 'Error: Could not connect';
    exit;

}

$query = "SELECT * FROM `Tokens` WHERE `Number` LIKE '%$search%' ";


       echo "after";

$result = $db->query($query);
if ($result) {
    $num_results = $result->num_rows;

    $row = $result->fetch_assoc();


    echo $row;

    if (!$row)
    {
        echo "No Token, insert into database";
        insertToken($table,$pieces[1]);

        return;

    }

   /*problem may be around here...? does not always go into (!row)
     after the first time when it is supposed too*/

echo $row['Numbers'];


} else {
   // echo "Query failed: {$db->error}\n";

    echo "No";

}

}




function insertToken ($daTable, $daToken)
{

$username='XXXX';
$password='XXXX';
$database='Push';

 $token=$daToken;

 $con= mysql_connect("localhost",$username,$password);

  mysql_select_db($database,$con);

  $res = mysql_query(
"INSERT INTO $daTable
VALUES ('', '$token')");
if (!$res) {
die('Invalid query: ' . mysql_error());
 } else  {
echo "complete";
 }

mysql_close($link);

  }
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