PHP $_GET doesn't "see" that image has been clicked

Question

I have a website with a series of images of products, and I want to have the functionality that when a user clicks on an image, it redirects to a separate webpage with more information, which is generated on-the-fly via PHP. I'm using sessions to transfer the data.

In determining whether one of the images has been clicked, I am following the advice given here.

However, my isset($_GET['value']) always just returns false. It doesn't get past my for-loop. Here's my code:

  function show_product($nm, $price, $image, $pcode){
    echo "<h4> $nm at $price </h4>";
    echo "<a href='product_webpage.php?value=$pcode'><img src=$image></a><br>";
   }

$q = "SELECT productName, MSRP, imageFilePath, productCode FROM productsAndServices WHERE productLine = 'Apparel'"; /***** ADJUST THIS FOR PRODUCT LINE ****/
$result = $conn->query($q);
if (!$result) die ($conn->error);

$rows = $result->num_rows;
for ($i=1; $i <= $rows ; $i++){
   $result->data_seek($i-1);
   $arr = $result->fetch_assoc();
   show_product($arr["productName"], $arr["MSRP"], $arr["imageFilePath"], $arr["productCode"]);
}

// Grab product code when user clicks an image


if(isset($_GET['value'])) // this returns false.
{
   $CLICKED_IMG_CODE = $_GET['value'];
} 

// Overwrite this value to a cookie for use in product_webpage.php
$_SESSION['key'] = $CLICKED_IMG_CODE;

My goal is for it to pass the value of $pcode onto the next webpage.

@Forbs I'm not using a form. I'm trying to follow the answer given by user2426701 in the post that I linked. Does their answer not work without a form? — zh1, Apr 18 '18 at 22:44
@Wearwolf If I echo `_SESSION['key']` in the generated page, you get zero (or undefined). However, the URL of the generated page does properly contain the right value of `$pcode`. — zh1, Apr 18 '18 at 22:46
$CLICKED_IMG_CODE does not exist if there is no value set. Maybe that is causing you issues. — Dylan McGreevy, Apr 18 '18 at 23:01
Maybe try something like this (untested syntax maybe wrong). $_SESSION['key'] = isset($_GET['value']) ? $CLICKED_IMG_CODE : null; — Dylan McGreevy, Apr 18 '18 at 23:02
That is definitely what is causing the issues. I'm trying to figure out why there is no value set. — zh1, Apr 18 '18 at 23:03
Question, what does `isset($_POST['value'])` return? because the thread you linked seems to use post methods. — Scuzzy, Apr 18 '18 at 23:09
@PedroLobito I did use `session_start()`. I tested this by forcing the session key. @Scuzzy Using `_POST()` instead of `_GET()` did not change anything, unfortunately. — zh1, Apr 18 '18 at 23:14
@zhutchens1 what you do mean you aren't using a form, the example linked above uses a form. To do a Picture click and to perform a get you either need a Form or an href url, something doesn't sound right. — Forbs, Apr 18 '18 at 23:43
@zhutchens1 ok then right before the isset do a `var_dump($_GET)` to see what input you are getting. — Forbs, Apr 20 '18 at 00:10

PHP $_GET doesn't "see" that image has been clicked

0 Answers0