Can't retrieve numeric input and assign it to a variable - php

Question

I'm tring to retrieve the numeric input and store it in the variabe q but I can't seem to access it using the method post this way.
<?php
$sql = "SELECT * FROM produit";
$result = mysqli_query($conn, $sql);
while($row = mysqli_fetch_assoc($result)){
?>
<div class="prod<?php echo $row['ID_produit']?>">
<img src="images/<?php echo $row['image']?>" alt="image">
<h3><?php echo $row['nom_produit']?></h3>
<h3>Prix:<?php echo $row['prix']?>€</h6>
<form action="" method="post">
<label name="qte">QTE:</label>
<input type="number" name="qte"><br><br>
<a href="panier.php?action=ajout&
l=<?php echo $row['nom_produit']?>&
q=<?php $_POST['qte']?>&
p=<?php echo $row['prix']?>"
onclick="window.open(this.href, '', 'toolbar=no, location=no, directories=no, status=yes,
scrollbars=yes, resizable=yes, copyhistory=no, width=600, height=350'); return false;">
GOGOGO </a>
</form>
</div>
<?php
}
?>
</div>
I also tried with
<?php
if (isset($_POST['submit'])) {
$example = $_POST['qte'];
echo $example;
}
?>

Answer 1

There's a couple issues with this code. You were trying to reference qte in each loop through a $_POST variable, when what you really wanted was to just grab the input from the user. In an effort to clean up the code a little and make things more readable, I changed that big <a href... tag to trigger a function that will grab the qte value, form the URL and open the window. Note that I pass into the function the productID and prix values. I put them in quotes just in case they're blank. I also added an ID to your qte input element so we can get the value. Take a look and let me know if you need clarification
<?php
$sql = "SELECT * FROM produit";
$result = mysqli_query($conn, $sql);
while($row = mysqli_fetch_assoc($result)){
?>
<div class="prod<?php echo $row['ID_produit']?>">
<img src="images/<?php echo $row['image']?>" alt="image">
<h3><?php echo $row['nom_produit']?></h3>
<h3>Prix:<?php echo $row['prix']?>€</h6>
<form action="" method="post" onsubmit="return false;">
<label for="qte">QTE:</label>
<input type="number" name="qte" id="qte_<?php echo $row['ID_produit']?>"><br><br>
<a href='javascript:void(0)'
onclick='gogoLink("<?php echo $row['ID_produit']?>", "<?php echo $row['prix']?>")'>
GOGOGO </a>
</form>
</div>
<?php
}
?>
// then outside the loop is the function
<script>
function gogoLink(id, prix) {
let url ="panier.php?action=ajout"
url += "&l=" + id
url += "&q=" + document.getElementById("qte_"+id).value;
url += "&p=" + prix;
window.open(url, '', 'toolbar=no, location=no, directories=no, status=yes,
scrollbars=yes, resizable=yes, copyhistory=no, width=600, height=350');
}
</script>