Euh le alert() me renvoie ERROR ce qui semble normal car dans on alert() tu as mis "ERROR" si je mets alert(data) dans le error ça me renvoie "Object object"

Salut,

C'est normal, tu fais ton incrémentation dans la boucle qui parcours tous les produits de ton panier. Étant donné que ta condition se fait que sur le GET['action'], tu rentres dedans pour chaque produit du panier.

Un moyen simple et rapide serait de rajouter un autre attribut GET avec le code du produit par exemple afin de mettre une condition sur ce code produit et n'incrémenter que la quantité de celui-ci.

<?php

	if(isset($_SESSION["cart_products"])) //check session var
    {
		$total = 0; //set initial total value
		$b = 0; //var for zebra stripe table 
		foreach ($_SESSION["cart_products"] as $cart_itm)
        {
			//set variables to use in content below
			$product_name = $cart_itm["product_name"];
			$product_qty = $cart_itm["product_qty"];
			$product_price = $cart_itm["product_price"];
			$product_code = $cart_itm["product_code"];
			$valide = $cart_itm["valide"];
		    echo '<tr class="'.$bg_color.'">';
		    if(!isset($_GET['product_qty'])){
			 $product_qty = 1;
			}
			else{
			 $product_qty=$_GET['product_qty'];
			}
			if(isset($_GET['action']) && $product_qty >= 1){
			 if($_GET['action'] == 'incr'){
			  $product_qty++; 
			 }
			 elseif($_GET['action'] == 'decr' && $product_qty >= 1){
			  $product_qty--;
			 }
			}

			$subtotal = ($product_price * $product_qty); //calculate Price x Qty

			echo '
			<td class="cart_quantity">
			<div class="cart_quantity_button">';
			?>
			<a href="http://top.org/check?product_qty=<?php echo $product_qty; ?>&action=decr" class="cart_quantity_up"> - </a> 
			<?php 
			echo '<input class="cart_quantity_input" type="text" name="product_qty['.$product_code.']" value="'.$product_qty.'" size="2">';
			?>
			<a href="http://top.org/check?product_qty=<?php echo $product_qty; ?>&action=incr" class="cart_quantity_up">+</a>
			<?
			echo '
			</div>
			</td>';
			echo '<td>'.$product_name.'</td>';
			echo '<td>'.$product_price.' '.$currency.'</td>';
			echo '<td>'.$subtotal.' '.$currency.'</td>';
			
			echo '
			<td class="cart_deletes">
			<button type="submit" href="" name="remove_code[]" value="'.$product_code.'"><a class="cart_quantity_delete"></a><i class="fa fa-times"></i></button>
			</td>';
            echo '</tr>';
			$total = ($total + $subtotal); //add subtotal to total var
        }
		
		$grand_total = $total + $shipping_cost; //grand total including shipping cost
		foreach($taxes as $key => $value){ //list and calculate all taxes in array
				$tax_amount     = round($total * ($value / 100));
				$tax_item[$key] = $tax_amount;
				$grand_total    = $grand_total + $tax_amount;  //add tax val to grand total
		}
		
		$list_tax       = '';
		foreach($tax_item as $key => $value){ //List all taxes
			$list_tax .= $key. ' : '.sprintf("%01.2f", $value).' '.$currency.'<br />';
		}
		$shipping_cost = ($shipping_cost)?'Frais de port : '.sprintf("%01.2f", $shipping_cost).$currency.'<br />':'';
	}
    ?>

Bonjour à tous,
je viens de programmer un script php qui permet d'augmenté ou diminué une valeur en php, mais le problème viens au niveau d'un deuxième élément quand j'augmente une valeur du premier élément le deuxième élément augmente aussi sa valeur. :(
Voici le code:
[php]<?php

if(isset($_SESSION["cart_products"])) //check session var
{
$total = 0; //set initial total value
$b = 0; //var for zebra stripe table
foreach ($_SESSION["cart_products"] as $cart_itm)
{
//set variables to use in content below
$product_name = $cart_itm["product_name"];
$product_qty = $cart_itm["product_qty"];
$product_price = $cart_itm["product_price"];
$product_code = $cart_itm["product_code"];
$valide = $cart_itm["valide"];
echo '<tr class="'.$bg_color.'">';
if(!isset($_GET['product_qty'])){
$product_qty = 1;
}
else{
$product_qty=$_GET['product_qty'];
}
if(isset($_GET['action']) && $product_qty >= 1){
if($_GET['action'] == 'incr'){
$product_qty++;
}
elseif($_GET['action'] == 'decr' && $product_qty >= 1){
$product_qty--;
}
}

$subtotal = ($product_price * $product_qty); //calculate Price x Qty

echo '
<td class="cart_quantity">
<div class="cart_quantity_button">';
?>
<a href="http://top.org/check?product_qty=<?php echo $product_qty; ?>&action=decr" class="cart_quantity_up"> - </a>
<?php
echo '<input class="cart_quantity_input" type="text" name="product_qty['.$product_code.']" value="'.$product_qty.'" size="2">';
?>
<a href="http://top.org/check?product_qty=<?php echo $product_qty; ?>&action=incr" class="cart_quantity_up">+</a>
<?
echo '
</div>
</td>';
echo '<td>'.$product_name.'</td>';
echo '<td>'.$product_price.' '.$currency.'</td>';
echo '<td>'.$subtotal.' '.$currency.'</td>';

echo '
<td class="cart_deletes">
<button type="submit" href="" name="remove_code[]" value="'.$product_code.'"><a class="cart_quantity_delete"></a><i class="fa fa-times"></i></button>
</td>';
echo '</tr>';
$total = ($total + $subtotal); //add subtotal to total var
}

$grand_total = $total + $shipping_cost; //grand total including shipping cost
foreach($taxes as $key => $value){ //list and calculate all taxes in array
$tax_amount = round($total * ($value / 100));
$tax_item[$key] = $tax_amount;
$grand_total = $grand_total + $tax_amount; //add tax val to grand total
}

$list_tax = '';
foreach($tax_item as $key => $value){ //List all taxes
$list_tax .= $key. ' : '.sprintf("%01.2f", $value).' '.$currency.'<br />';
}
$shipping_cost = ($shipping_cost)?'Frais de port : '.sprintf("%01.2f", $shipping_cost).$currency.'<br />':'';
}
?>[/php]