PHP posting values but database not updating on hosting – CPanel

Hello i need help my code and database is working 100% fine on localhost but when i upload website on hosting server php is not updating database. on localhost its working completely fine. my code support php version 5.6 so i have also updated php version 5.6 on cpanel but i dont know why its not work on hosting server. my code is below

<?php
ob_start();
 include("db_connection.php");



$sql="select distinct  userid ,  emailadress, Name ,allow from account where `allow` = 'y'   ";
$SQLRes=mysql_query($sql);
$s=0;

while($SQLRow=mysql_fetch_array($SQLRes)){
$s=$s+1;

$userID=$SQLRow["userid"];
$email=$SQLRow["emailadress"];
$nn=$SQLRow["Name"];

$tot=0;

$rr="converted to order";
$sr="";

$sqlo="select * from orders  where userID='".$userID."' and priceStatus='Receiveable' and orderType !='Quote'   ";
$SQLReo=mysql_query($sqlo);

while($SQLRo=mysql_fetch_array($SQLReo)){


$tot=$tot+$SQLRo["prices"];


}

$sqlt="insert into invtotal ( userName ,totalAmount , invStatus , userEmail , namee) values ('".$userID."'  , ".$tot." , 'Receiveable' , '".$email."' , '".$nn."') ";

echo $sqlt;

mysql_query($sqlt);

}





header("location:invoice.php");

ob_flush();
?>