sample_refund.php

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<html lang="en">
  <head>
    <title>Vacation Rental - Free Bootstrap 4 Template by Colorlib</title>
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  <body>
         
		<div class="wrap">
			<div class="container">
				<div class="row justify-content-between">
						<div class="col d-flex align-items-center">
							<p class="mb-0 phone"><span class="mailus">Phone no:</span> <a href="#">+00 1234 567</a> or <span class="mailus">email us:</span> <a href="#">emailsample@email.com</a></p>
						</div>
						<div class="col d-flex justify-content-end">
							<div class="social-media">
				    		<p class="mb-0 d-flex">
				    			<a href="#" class="d-flex align-items-center justify-content-center"><span class="fa fa-facebook"><i class="sr-only">Facebook</i></span></a>
				    			<a href="#" class="d-flex align-items-center justify-content-center"><span class="fa fa-twitter"><i class="sr-only">Twitter</i></span></a>
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				    			<a href="#" class="d-flex align-items-center justify-content-center"><span class="fa fa-dribbble"><i class="sr-only">Dribbble</i></span></a>
				    		</p>
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    <!-- END nav -->
    <!-- Add this inside the <body> tag -->
    <section class="ftco-section bg-light">
        <div class="container">
            <div class="row">
                <div class="col-md-6">
                    <h2>Refund Request</h2>
                    <!-- Updated form action to point to your PHP processing script -->
                    <form action="process_refund.php" method="POST">
                        <div class="form-group">
                            <label for="username">Username:</label>
                            <input type="text" name="username" id="username" class="form-control" required>
                        </div>
                        <div class="form-group">
                            <label for="check_in">Check-in Date:</label>
                            <input type="date" name="check_in" id="check_in" class="form-control" required>
                        </div>
                        <div class="form-group">
                            <label for="check_out">Check-out Date:</label>
                            <input type="date" name="check_out" id="check_out" class="form-control" required>
                        </div>
                        <div class="form-group">
                            <label for="refund_reason">Reason for Refund:</label>
                            <textarea name="refund_reason" id="refund_reason" class="form-control" rows="4" required></textarea>
                        </div>
                        <!-- Display the calculated refund amount here -->
                        <div class="form-group">
                            <label for="refund_amount">Calculated Refund Amount:</label>
                            <input type="text" name="refund_amount" id="refund_amount" class="form-control" value="<?php echo $refund_amount; ?>" readonly>
                        </div>
                        <div class="form-group">
                            <button type="submit" class="btn btn-primary">Submit Refund Request</button>
                        </div>
                    </form>
                </div>
            </div>
        </div>
    </section>


    <footer class="footer">
			<div class="container">
				<div class="row">
					<div class="col-md-6 col-lg-3 mb-md-0 mb-4">
						<h2 class="footer-heading"><a href="#" class="logo">Vacation Rental</a></h2>
						<p>A small river named Duden flows by their place and supplies it with the necessary regelialia.</p>
						<a href="#">Read more <span class="fa fa-chevron-right" style="font-size: 11px;"></span></a>
					</div>
					<div class="col-md-6 col-lg-3 mb-md-0 mb-4">
						<h2 class="footer-heading">Services</h2>
						<ul class="list-unstyled">
              <li><a href="#" class="py-1 d-block">Map Direction</a></li>
              <li><a href="#" class="py-1 d-block">Accomodation Services</a></li>
              <li><a href="#" class="py-1 d-block">Great Experience</a></li>
              <li><a href="#" class="py-1 d-block">Perfect central location</a></li>
            </ul>
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					<div class="col-md-6 col-lg-3 mb-md-0 mb-4">
						<h2 class="footer-heading">Tag cloud</h2>
						<div class="tagcloud">
	            <a href="#" class="tag-cloud-link">apartment</a>
	            <a href="#" class="tag-cloud-link">home</a>
	            <a href="#" class="tag-cloud-link">vacation</a>
	            <a href="#" class="tag-cloud-link">rental</a>
	            <a href="#" class="tag-cloud-link">rent</a>
	            <a href="#" class="tag-cloud-link">house</a>
	            <a href="#" class="tag-cloud-link">place</a>
	            <a href="#" class="tag-cloud-link">drinks</a>
	          </div>
					</div>
					<div class="col-md-6 col-lg-3 mb-md-0 mb-4">
						<h2 class="footer-heading">Subcribe</h2>
						<form action="#" class="subscribe-form">
              <div class="form-group d-flex">
                <input type="text" class="form-control rounded-left" placeholder="Enter email address">
                <button type="submit" class="form-control submit rounded-right"><span class="sr-only">Submit</span><i class="fa fa-paper-plane"></i></button>
              </div>
            </form>
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            </ul>
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			<div class="w-100 mt-5 border-top py-5">
				<div class="container">
					<div class="row">
	          <div class="col-md-6 col-lg-8">


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