array(0) {
}
<ul>
        <li><a href="login.php">Login</a></li>
    <li><a href="signup.php">Sign Up</a></li>
    </ul>
<h1>Welcome!</h1>

<form method="POST">

    <h3></h3>
    <h5>$4.99</h5>
    <button name="product" value="1">Add to cart</button>
    <h3></h3>
    <h5>$4.99</h5>
    <button name="product" value="2">Add to cart</button>
    <h3></h3>
    <h5>$4.99</h5>
    <button name="product" value="3">Add to cart</button>
    <h3></h3>
    <h5>$4.99</h5>
    <button name="product" value="4">Add to cart</button>
    <h3></h3>
    <h5>$4.99</h5>
    <button name="product" value="5">Add to cart</button>
    <h3></h3>
    <h5>$4.99</h5>
    <button name="product" value="6">Add to cart</button>
    <h3></h3>
    <h5>$4.99</h5>
    <button name="product" value="7">Add to cart</button>
    <h3></h3>
    <h5>$4.99</h5>
    <button name="product" value="8">Add to cart</button>
    <h3></h3>
    <h5>$4.99</h5>
    <button name="product" value="9">Add to cart</button>
    <h3></h3>
    <h5>$4.99</h5>
    <button name="product" value="10">Add to cart</button>
    <h3></h3>
    <h5>$21.99</h5>
    <button name="product" value="11">Add to cart</button>
    <h3></h3>
    <h5>$24.99</h5>
    <button name="product" value="12">Add to cart</button>
    <h3></h3>
    <h5>$79.99</h5>
    <button name="product" value="13">Add to cart</button>
    <h3></h3>
    <h5>$12.99</h5>
    <button name="product" value="14">Add to cart</button>
    <h3></h3>
    <h5>$8.99</h5>
    <button name="product" value="15">Add to cart</button>
    <h3></h3>
    <h5>$8.99</h5>
    <button name="product" value="16">Add to cart</button>
    <h3></h3>
    <h5>$168.99</h5>
    <button name="product" value="17">Add to cart</button>
    <h3></h3>
    <h5>$20.00</h5>
    <button name="product" value="18">Add to cart</button>
    <h3></h3>
    <h5>$19.00</h5>
    <button name="product" value="19">Add to cart</button>
    <h3></h3>
    <h5>$16.00</h5>
    <button name="product" value="20">Add to cart</button>

</form>