I got a session which adds ids to an array, the problem is every id gets added even if the id is already present. How can I prevent duplicate id's from being added to the array?
I figured I need to check for the id using in_array but I don't know exactly how to use it correctly.
I send the id of the product to my quote page using this link:
<p><a class="offertelink" href="offerte.php?product='.$productcr[0]['id'].'">Request a quote</a></p>
Then on that page I use the following code:
if(!isset($_SESSION['product'])){
$_SESSION['product'] = array();
}
// CHECK FIRST THAT $_GET['product'] IS SET BEFORE ADDING IT TO SESSION
if( isset($_GET['product'])){
$_SESSION['product'][] = $_GET['product'];
}
$prods = implode(",", $_SESSION['product']);
And finally load all the products with the ids that are inside the array:
if(count($_SESSION['product']) != 0){
// offerte overzicht
$offerte = "SELECT * FROM `snm_content` WHERE `id` in (".$conn->real_escape_string($prods).") AND state = 1";
$offertecon = $conn->query($offerte);
$offertecr = array();
while ($offertecr[] = $offertecon->fetch_array());
}
But now everytime I reload the page, the id is added again, it's not really bad since the products are only loaded once, but still I would like to fix this, because I think a query checking for tons of duplicate ids is not the best way.