Criar a pasta
/var/www/html/app-mvc/src/view/customers
E dentro dela o arquivo
edit.php
Contendo:
<div class="container">
<h2 class="text-center">Customers</h2>
<!--<h5>You are in the View: application/view/customers/edit.php (everything in this box comes from that file)</h5>-->
<!-- add customer form -->
<div>
<br> <br>
<form class="form-inline" action="<?php echo URL; ?>customers/update" method="POST">
<label>Name </label>
<input autofocus class="form-control" type="text" name="name" value="<?php echo htmlspecialchars($customer->name, ENT_QUOTES, 'UTF-8'); ?>" required />
<label> E-mail</label>
<input class="form-control" type="email" name="email" value="<?php echo htmlspecialchars($customer->email, ENT_QUOTES, 'UTF-8'); ?>" required />
<label> Birthday</label>
<input class="form-control" type="date" name="birthday" value="<?php echo htmlspecialchars($customer->birthday, ENT_QUOTES, 'UTF-8'); ?>" />
<input type="hidden" name="customer_id" value="<?php echo htmlspecialchars($customer->id, ENT_QUOTES, 'UTF-8'); ?>" />
<input class="btn btn-primary btn-sm" type="submit" name="submit_update_customer" value="Update Customer" />
</form>
</div>
</div>
<br><br><br>