how to create a basic coupon code functionality generator and save it to our database and redeem it with the user. If you build a project about E-commerce this functionality is important to share coupon codes to your customer and get a discount.
index.php
<!DOCTYPE html>
<html lang="en">
<head>
<title>Promocode apply project In PHP</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<h2></h2>
<div class="form-group">
<label for="email">Total Price:</label>
<input type="text" class="form-control" id="total_price" name="total_price" value="1000.00">
</div>
<div class="form-group">
<label for="promo_code">Apply Promocode:</label>
<input type="text" class="form-control" id="coupon_code" placeholder="Apply Promocode" name="coupon_code">
<b><span id="message" style="color:green;"></span></b>
</div>
<button id="apply" class="btn btn-default">Apply</button>
<button id="edit" class="btn btn-default" style="display:none;">Edit</button>
</div>
<script>
$("#apply").click(function(){
if($('#promo_code').val()!=''){
$.ajax({
type: "POST",
url: "process.php",
data:{
coupon_code: $('#coupon_code').val()
},
success: function(dataResult){
var dataResult = JSON.parse(dataResult);
if(dataResult.statusCode==200){
var after_apply=$('#total_price').val()-dataResult.value;
$('#total_price').val(after_apply);
$('#apply').hide();
$('#edit').show();
$('#message').html("Promocode applied successfully !");
}
else if(dataResult.statusCode==201){
$('#message').html("Invalid promocode !");
}
}
});
}
else{
$('#message').html("Promocode can not be blank .Enter a Valid Promocode !");
}
});
$("#edit").click(function(){
$('#coupon_code').val("");
$('#apply').show();
$('#edit').hide();
location.reload();
});
</script>
</body>
</html>
Connection.php
<?php
$url='localhost';
$username = "root";
$password = "";
$dbname = "school";
$conn = mysqli_connect($url, $username, $password, $dbname);
/* Check connection */
if (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}
?>
process.php
<?php
include 'conn.php';
$coupon_code=$_POST['coupon_code'];
$query=mysqli_query($conn,"select * from coupon_code where coupon_code='$coupon_code' and status=1");
$row=mysqli_fetch_array($query);
if (mysqli_num_rows($query)>0){
echo json_encode(array(
"statusCode"=>200,
"value"=>$row['value']
));
}
else{
echo json_encode(array("statusCode"=>201));
}
?>
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