cannot insert into localhost(mysql) database using php [duplicate] - php

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I can't insert the registration form data into my localhost database.
I am using xampp server, running mysql 5, php 7 and apache2. I've provided the code that can insert the form data into the database. The database is connected. I have also restarted the xampp server but it shows the same problem.
<?php
$active='Account';
include("includes/header.php");
?>
//html form with correct name values
<?php
if(isset($_POST['register'])){
$c_name = $_POST['c_name'];
$c_email = $_POST['c_email'];
$c_pass = $_POST['c_pass'];
$c_country = $_POST['c_country'];
$c_city = $_POST['c_city'];
$c_contact = $_POST['c_contact'];
$c_address = $_POST['c_address'];
$c_image = $_FILES['c_image']['name'];
$c_image_tmp = $_FILES['c_image']['tmp_name'];
move_uploaded_file($c_image_tmp,"customer/customer_images/$c_image");
$insert_customer = "insert into customers (customer_name,customer_email,customer_pass,customer_country,customer_city,customer_contact,customer_address,customer_image,customer_ip) values ('$c_name','$c_email','$c_pass','$c_country','$c_city','$c_contact','$c_address','$c_image','$c_ip')";
$result = mysqli_query($con,$insert_customer);
$sel_cart = "select * from cart where ip_add='$c_ip'";
$run_cart = mysqli_query($con,$sel_cart);
$check_cart = mysqli_num_rows($run_cart);
if($check_cart>0){
$_SESSION['customer_email']=$c_email;
echo "<script>alert('User is already present');</script>";
echo "<script>window.open('checkout.php','_self')</script>";
}else{
$_SESSION['customer_email']=$c_email;
echo "<script>alert('You have been Registered Sucessfully')</script>";
echo "<script>window.open('index.php','_self')</script>";
}
}
?>
The data should be inserted into the db when I refresh the phpmyadmin page.

Answer 1

Check $con variable where you define. Connection variable should be define on page and call with mysqli function.
$result = mysqli_query($con,$insert_customer);