PHP如何使URL像product.php？id = 1

Question

I am doing a simple php cart. Basically is for learning purpose and I am trying to search solution for my question. However, i am not sure what is the keyword for my question. Hence, I post it here.

echo "<p>Product A | <a href='product.php?id=a'>Add to Cart</a></p>";
echo "<p>Product B | <a href='product.php?id=b'>Add to Cart</a></p>";
echo "<p>Product C | <a href='product.php?id=c'>Add to Cart</a></p>";

Basically, every product shares the same landing page -> product.php just like normal shopping cart. So when user clicks product A "Add to Cart", it will land on produt.php?id=a , if product B, then will be produt.php?id=b . My questions is how to make the url sth like I mentioned?

Please refer to a screenshot.

Answer 1

Since the id parameter is in the url it is called a GET parameter. You can access to GET parameters using the global variable $_GET.

In product.php you should have something like:

if(isset($_GET['id'])){
    $id = $_GET['id'];
    if($id=='a'){
        // do something
    }
    else if($id=='b'){
        // do something else
    }   
}