I have select option, if I change the value, I need to update the session array value.

Example, in $_SESSION I have two products

I am displaying the array on cart page with select option to change the qty.

if I change the option qty for the first product, it's updating both the product value.

Here is my PHP code

var_dump ($_SESSION['addcart'])

array(2) { 
    ["169aw"]=> array(3) { 
        ["product_id"]=> string(3) "169" 
        ["qty"]=> string(1) "2" 
        ["price"]=> string(3) "189" 
    } 
    
    ["86aw"]=> array(3) { 
        ["product_id"]=> string(2) "86" 
        ["qty"]=> string(1) "1" 
        ["price"]=> string(3) "220" 
    }
}

Displaying the array in select field

$tot_cart = $_SESSION['addcart'];
$keys = array_keys($tot_cart);

for($i = 0; $i < count($tot_cart); $i  ) {
    foreach([$keys[$i]] as $key => $value) {
        $newqty = $tot_cart[$keys[$i]]['qty'];
    }

<form action="<?php echo $base_url?>pages/login-script.php" id="cart-qty-update">
    <input type="text" value="<?php echo $keys[$i]?>" name="cart-prd-item" >
    <select name="sel-prod-opt" id="sel-prod-opt-val" onchange="update_cart()">
        <option value="1" <?php if($newqty == 1){ echo 'selected';} ?> >1</option>
        <option value="2" <?php if($newqty == 2){ echo 'selected';} ?>>2</option>
        <option value="3" <?php if($newqty == 3){ echo 'selected';} ?>>3</option>
        <option value="4" <?php if($newqty == 4){ echo 'selected';} ?>>4</option>
        <option value="5" <?php if($newqty == 5){ echo 'selected';} ?>>5</option>
        <option value="6" <?php if($newqty == 6){ echo 'selected';} ?>>6</option>
        <option value="7" <?php if($newqty == 7){ echo 'selected';} ?>>7</option>
        <option value="8" <?php if($newqty == 8){ echo 'selected';} ?>>8</option>
        <option value="9" <?php if($newqty == 9){ echo 'selected';} ?>>9</option>
        <option value="10" <?php if($newqty == 10){ echo 'selected';} ?>>10</option>
    </select>
</form>

jQuery function to get the value of the new option

function update_cart(val){
    var cart_id = $('.cart-prd-item').val();
    var cart_qty = $('.sel-prod-opt-val').val();
    
    $.ajax({
        type: 'post',
        url: 'http://localhost/web/pages/script.php',
        data: {
            cart_id:cart_id,
            cart_qty:cart_qty
        },
        success: function (response) {
            $("#new_select").html(response); 
            window.location.replace('http://localhost/web/pages/cart.php');
        }
    });
}

PHP file to set the value

if(isset($_POST['get_option'])){
    $cart_qty = $_POST['cart_qty'];
    $cart_id = $_POST['cart_id'];
   
    $keys = array_keys($_SESSION['addcart']);
    for($i = 0; $i < count($_SESSION['addcart']); $i  ) {
        foreach([$keys[$i]] as $key => $value) {
            $_SESSION['addcart'][$cart_id]['qty'] = $cart_qty;
        }
    }
}

If i change the value of the first product, instead of updating the qty value of the first product, qty value of both the arrays has been updated

CodePudding user response：

Add in select the cart id

 <select name="sel-prod-opt"  data-cart-key="<?php echo $CartKey; ?>" id="sel-prod-opt-val">

So in the js update like that

$(".sel-prod-opt").on("change", function(){
    var value = $(this).val(),
        CartKey = $(this).attr("data-cart-key");
    //call your ajax for update the cart in session
}
// PHP File like:
$_SESSION[cart][$_POST[CartKey]]['qty'] = $_POST[value];

CodePudding user response：

As far as I understand you don't need to for or foreach. you solve this problem as following line. ofcourse if your cart_id and cart_qty is true then

if(isset($_POST['get_option'])){
  $cart_qty = $_POST['cart_qty'];
  $cart_id = $_POST['cart_id'];
  $_SESSION['addcart'][$cart_id]['qty'] = $cart_qty;
}