deleteadmin.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<link rel="stylesheet" type="text/css" href="astyle.css">
<div class="cntr">
    <div class="form_box">
<div style="text-align: center;">
    <h2> Delete Admin data</h2>
    <form  action="deleteadmin.php" method="post" class="input-group">
        <input type="text" name="username" class="input-field" placeholder="Admin Username to delete" required><br/>
        <button type="submit" name="delete" class="submit-btn">Delete Admin</button>
    </form>

</div>
    </div>
</div>
</body>
</html>