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/home/ynormeco/public_html/smapi/pages/update_gold_rates.php

<?php
ob_start();
include("../inc/config.php");
$conn = connect_database();

session_start();
$admin = isset($_SESSION['login']) ? $_SESSION['login'] : NULL;

$gold22 = mysqli_real_escape_string($conn, $_POST['gold22']) ?? '';
	$gold24 = mysqli_real_escape_string($conn, $_POST['gold24']) ?? '';
	$silver = mysqli_real_escape_string($conn, $_POST['silver']) ?? '';
	$petrol = mysqli_real_escape_string($conn, $_POST['petrol']) ?? '';
	$diesel = mysqli_real_escape_string($conn, $_POST['diesel']) ?? '';

$sql = mysqli_query($conn,"UPDATE `tbl_gold_silver_rate` SET `gold22` = '$gold22', `gold24` = '$gold24', `silver` = '$silver', `petrol`  = '$petrol', `diseal` = '$diesel'  ");

echo mysqli_error($conn);

if(!$sql)
                    {
                        echo mysqli_error($conn);
                    }
                    else
                    {
                    	 header('location: ../index.php?update=success');
                         return;
                           
                    }
   
ob_end_flush();