Question

I am new to php and programming,, I have been following a tutorial but I’ve ran into a problem when trying to display the products onto a web page, This is the code am testing

<?php 

if (isset($_GET['id'])) {

    include "storescripts/connect_to_mysql.php"; 
    $id = preg_replace('#[^0-9]#i', '', $_GET['id']); 
    $sql = mysql_query("SELECT * FROM products WHERE id='$id' LIMIT 1");
    $productCount = mysql_num_rows($sql); 
    if ($productCount > 0) {

        while($row = mysql_fetch_array($sql)){ 
             $product_name = $row["product_name"];
             $price = $row["price"];
             $details = $row["details"];
             $category = $row["category"];
             $subcategory = $row["subcategory"];
             $date_added = strftime("%b %d, %Y", strtotime($row["date_added"]));
         }

    } else {
        echo "That item does not exist.";
        exit();
    }

} else {
    echo "Data to render this page is missing.";
    exit();
}
mysql_close();
?>

When I try to view the page through my browser I get the message “Data to render this page is missing”

I understand that it”s something to do with

if (isset($_GET['id'])) {

And am assuming maybe it’s something to do with the ‘id’ But I cant work out how to fix it. Any pointers and help would be appreciated, sorry if this seems basic but like I said I am new and cant work this problem out. I’ve been trying all day

Thanks

Answer 1

When you see $_GET it’s looking for a parameter in the URL. So:

http://localhost/yourphpscript.php?id=123

…is what it’s expecting. Some ID must be defined in the URL.