Когда я пытаюсь добавить массив в PHP перезаписать

У меня есть корзина, когда я согласен с пунктом, все в порядке, но больше попробуйте добавить ту же статью, но с другим размером, она перезаписывает ту, которая уже есть.

Я пытаюсь что-нибудь, но я не могу решить эту проблему.

эта часть

/ * Обновить массив сессий элементов с добавленными элементами — элементами, которые
уже существующие в корзине будут перезаписаны * /

$ _SESSION [«items»] [$ Added_item [‘Item_id’]] = $ Added_item;

это массив, где перезаписать элементы.

    <?php

/* If session is not started, start session */
if(session_status()==PHP_SESSION_NONE){session_start();}
require_once("database.php");  // request database connection with its objects

if(isset($_POST["item_id"]) && isset($_POST['item_qty'])){
/* Get $_POST data and place it in array */
$added_item["item_id"]=$_POST['item_id'];
$added_item["item_qty"]=$_POST['item_qty'];
$added_item["item_size"]=$_POST['item_size'];

/* Fetch all items from database that matches $_POST['item_id']
Limit 1 at the end so only one item is fetched. */
$items = $database->find_by_query("SELECT * FROM shopping_items WHERE item_id='{$added_item["item_id"]}' LIMIT 1");

/* Foreach item -> Remaining data about items fetched from database */
foreach($items as $item){
$added_item["item_name"] = $item['item_name'];
$added_item["item_price"] = $item['item_price'];
$added_item["item_image"] = $item['item_image'];

/* Update item session array with newly added items - items that already exist in the basket will be overwritten */
$_SESSION["items"][$added_item['item_id']] = $added_item;

#$_SESSION['items'][$added_item];

}
/* Calculate number of items in cart and output it in json format */
exit(json_encode(array('items_in_cart'=>count($_SESSION['items']))));

}
/* Display aded products in the shopping cart */
if(isset($_POST["load_cart_items"])){

/* If item session is already set and if there are any items added to the session */
if(isset($_SESSION["items"]) && count($_SESSION["items"])>0){
?>
<table class='table'> <!--Start table that will holds all data in the shopping cart -->
<?php
$total=0; // define total so the script won't throw silly error of a type 'Undefined variable: total in....'

/* Loop through item session array and display data */
foreach($_SESSION["items"] as $item){
?>
<tr class='itemInCardRow'>
<td class='itemInCartDisplay'>
<img class='img-responsive item_disp_image' style='max-width:80px; float:left;' src="images/<?php echo $item["item_image"]; ?>">
</td>

<td class='itemInCartDisplay'>
<?php echo $item["item_name"] .", size ". $item["item_size"]; ?>

<td class='itemInCartDisplay'>
<a href='#' class='subtruct_itm_qty quantity_change' item_id="<?php echo $item["item_id"]; ?>">-</a>
<?php echo "<span class='quantity'>Cantidad ".$item["item_qty"]."</span>"; ?>
<a href='#' class='add_itm_qty quantity_change' item_id="<?php echo $item["item_id"]; ?>">+</a>
</td>

<td class='itemInCartDisplay'>
<?php echo "$".sprintf("%.3f", ($item["item_price"] * $item["item_qty"])); ?>
</td>
<td class='itemInCartDisplay'>
<a href="#" class="remove_item_from_cart" item_id="<?php echo $item["item_id"]; ?>">x</a>
</td>
</tr>

<?php
/* Calculate Total */
$total += ($item["item_price"] * $item["item_qty"]);
}  // Close foreach loop
?>
<!-- This part displays Checkout button and price total -->
<tr>
<td class='itemInCartDisplay' colspan='4'>
<div>
<a href='checkOut.php' title="Review Cart and Check-Out"><button type="button" class="btn checkoutButton">Pagar</button></a>
<!--                        <a class="checkoutButton" href="view_cart.php" CHECKOUT</a>            -->
</div>
</td>
<td class='itemInCartDisplay' style='text-align:right;'>
<div class="cart-products-total">
<span>Total : <span style='font-size:20px; color:#008cba;'></span>
<?php
// Return a total price with 2 decimals
echo "$".sprintf("%.3f",$total);
?>
</span>
</div>
</td>
</tr>
</table>

<?php

}else{
/*  Information about empty shopping cart  - exit() function prints a message and exits current script
Can be used as die() */
exit("No tienes items en el carrito");
}
}

/* Add item quantity - Allow maximum 5 of each item to be added  */
if(isset($_GET["add_itm_qty"]) && isset($_SESSION["items"])){
if(isset($_SESSION['items'][$_GET["add_itm_qty"]])){
if($_SESSION['items'][$_GET["add_itm_qty"]]["item_qty"] <= 4){
$_SESSION['items'][$_GET["add_itm_qty"]]["item_qty"]+=1;
}else{
$_SESSION['items'][$_GET["add_itm_qty"]]["item_qty"]=5;
}
}
unset($_GET["add_itm_qty"]);
exit(json_encode(array('items_in_cart'=>count($_SESSION['items']),(array('all_items'=>$_SESSION["items"])))));
}

/* Subtract item quantity - deduct qty ONLY if item_qty is NOT smaller than 0  */
if(isset($_GET["subtruct_itm_qty"]) && isset($_SESSION["items"])){
if(isset($_SESSION['items'][$_GET["subtruct_itm_qty"]])){
if($_SESSION['items'][$_GET["subtruct_itm_qty"]]["item_qty"] >= 2){
$_SESSION['items'][$_GET["subtruct_itm_qty"]]["item_qty"]-=1;
}else{
$_SESSION['items'][$_GET["subtruct_itm_qty"]]["item_qty"]=1;
}
}
unset($_GET["subtruct_itm_qty"]);
/* Get item quantity and output it in json format */
exit(json_encode((array('item_qty'=>$_SESSION["items"]))));
}

/* Remove item from shopping cart */
if(isset($_GET["remove_item_from_cart"]) && isset($_SESSION["items"])){
$item_id = $_GET["remove_item_from_cart"];
/* Check if item is ina item session array */
if(isset($_SESSION["items"][$item_id])){
unset($_SESSION["items"][$item_id]);  // Remove/unset item
}
/* Calculate total number of items in cart and output it in json format */
exit(json_encode(array('items_in_cart'=>count($_SESSION['items']))));
}
<?php

/* If session is not started, start session */
if(session_status()==PHP_SESSION_NONE){session_start();}
require_once("database.php");  // request database connection with its objects

if(isset($_POST["item_id"]) && isset($_POST['item_qty'])){
/* Get $_POST data and place it in array */
$added_item["item_id"]=$_POST['item_id'];
$added_item["item_qty"]=$_POST['item_qty'];
$added_item["item_size"]=$_POST['item_size'];

/* Fetch all items from database that matches $_POST['item_id']
Limit 1 at the end so only one item is fetched. */
$items = $database->find_by_query("SELECT * FROM shopping_items WHERE item_id='{$added_item["item_id"]}' LIMIT 1");

/* Foreach item -> Remaining data about items fetched from database */
foreach($items as $item){
$added_item["item_name"] = $item['item_name'];
$added_item["item_price"] = $item['item_price'];
$added_item["item_image"] = $item['item_image'];

/* Update item session array with newly added items - items that already exist in the basket will be overwritten */
$_SESSION["items"][$added_item['item_id']] = $added_item;

#$_SESSION['items'][$added_item];

}
/* Calculate number of items in cart and output it in json format */
exit(json_encode(array('items_in_cart'=>count($_SESSION['items']))));

}
/* Display aded products in the shopping cart */
if(isset($_POST["load_cart_items"])){

/* If item session is already set and if there are any items added to the session */
if(isset($_SESSION["items"]) && count($_SESSION["items"])>0){
?>
<table class='table'> <!--Start table that will holds all data in the shopping cart -->
<?php
$total=0; // define total so the script won't throw silly error of a type 'Undefined variable: total in....'

/* Loop through item session array and display data */
foreach($_SESSION["items"] as $item){
?>
<tr class='itemInCardRow'>
<td class='itemInCartDisplay'>
<img class='img-responsive item_disp_image' style='max-width:80px; float:left;' src="images/<?php echo $item["item_image"]; ?>">
</td>

<td class='itemInCartDisplay'>
<?php echo $item["item_name"] .", size ". $item["item_size"]; ?>

<td class='itemInCartDisplay'>
<a href='#' class='subtruct_itm_qty quantity_change' item_id="<?php echo $item["item_id"]; ?>">-</a>
<?php echo "<span class='quantity'>Cantidad ".$item["item_qty"]."</span>"; ?>
<a href='#' class='add_itm_qty quantity_change' item_id="<?php echo $item["item_id"]; ?>">+</a>
</td>

<td class='itemInCartDisplay'>
<?php echo "$".sprintf("%.3f", ($item["item_price"] * $item["item_qty"])); ?>
</td>
<td class='itemInCartDisplay'>
<a href="#" class="remove_item_from_cart" item_id="<?php echo $item["item_id"]; ?>">x</a>
</td>
</tr>

<?php
/* Calculate Total */
$total += ($item["item_price"] * $item["item_qty"]);
}  // Close foreach loop
?>
<!-- This part displays Checkout button and price total -->
<tr>
<td class='itemInCartDisplay' colspan='4'>
<div>
<a href='checkOut.php' title="Review Cart and Check-Out"><button type="button" class="btn checkoutButton">Pagar</button></a>
<!--                        <a class="checkoutButton" href="view_cart.php" CHECKOUT</a>            -->
</div>
</td>
<td class='itemInCartDisplay' style='text-align:right;'>
<div class="cart-products-total">
<span>Total : <span style='font-size:20px; color:#008cba;'></span>
<?php
// Return a total price with 2 decimals
echo "$".sprintf("%.3f",$total);
?>
</span>
</div>
</td>
</tr>
</table>

<?php

}else{
/*  Information about empty shopping cart  - exit() function prints a message and exits current script
Can be used as die() */
exit("No tienes items en el carrito");
}
}

/* Add item quantity - Allow maximum 5 of each item to be added  */
if(isset($_GET["add_itm_qty"]) && isset($_SESSION["items"])){
if(isset($_SESSION['items'][$_GET["add_itm_qty"]])){
if($_SESSION['items'][$_GET["add_itm_qty"]]["item_qty"] <= 4){
$_SESSION['items'][$_GET["add_itm_qty"]]["item_qty"]+=1;
}else{
$_SESSION['items'][$_GET["add_itm_qty"]]["item_qty"]=5;
}
}
unset($_GET["add_itm_qty"]);
exit(json_encode(array('items_in_cart'=>count($_SESSION['items']),(array('all_items'=>$_SESSION["items"])))));
}

/* Subtract item quantity - deduct qty ONLY if item_qty is NOT smaller than 0  */
if(isset($_GET["subtruct_itm_qty"]) && isset($_SESSION["items"])){
if(isset($_SESSION['items'][$_GET["subtruct_itm_qty"]])){
if($_SESSION['items'][$_GET["subtruct_itm_qty"]]["item_qty"] >= 2){
$_SESSION['items'][$_GET["subtruct_itm_qty"]]["item_qty"]-=1;
}else{
$_SESSION['items'][$_GET["subtruct_itm_qty"]]["item_qty"]=1;
}
}
unset($_GET["subtruct_itm_qty"]);
/* Get item quantity and output it in json format */
exit(json_encode((array('item_qty'=>$_SESSION["items"]))));
}

/* Remove item from shopping cart */
if(isset($_GET["remove_item_from_cart"]) && isset($_SESSION["items"])){
$item_id = $_GET["remove_item_from_cart"];
/* Check if item is ina item session array */
if(isset($_SESSION["items"][$item_id])){
unset($_SESSION["items"][$item_id]);  // Remove/unset item
}
/* Calculate total number of items in cart and output it in json format */
exit(json_encode(array('items_in_cart'=>count($_SESSION['items']))));
}
<?php

/* If session is not started, start session */
if(session_status()==PHP_SESSION_NONE){session_start();}
require_once("database.php");  // request database connection with its objects

if(isset($_POST["item_id"]) && isset($_POST['item_qty'])){
/* Get $_POST data and place it in array */
$added_item["item_id"]=$_POST['item_id'];
$added_item["item_qty"]=$_POST['item_qty'];
$added_item["item_size"]=$_POST['item_size'];

/* Fetch all items from database that matches $_POST['item_id']
Limit 1 at the end so only one item is fetched. */
$items = $database->find_by_query("SELECT * FROM shopping_items WHERE item_id='{$added_item["item_id"]}' LIMIT 1");

/* Foreach item -> Remaining data about items fetched from database */
foreach($items as $item){
$added_item["item_name"] = $item['item_name'];
$added_item["item_price"] = $item['item_price'];
$added_item["item_image"] = $item['item_image'];

/* Update item session array with newly added items - items that already exist in the basket will be overwritten */
$_SESSION["items"][$added_item['item_id']] = $added_item;

#$_SESSION['items'][$added_item];

}
/* Calculate number of items in cart and output it in json format */
exit(json_encode(array('items_in_cart'=>count($_SESSION['items']))));

}
/* Display aded products in the shopping cart */
if(isset($_POST["load_cart_items"])){

/* If item session is already set and if there are any items added to the session */
if(isset($_SESSION["items"]) && count($_SESSION["items"])>0){
?>
<table class='table'> <!--Start table that will holds all data in the shopping cart -->
<?php
$total=0; // define total so the script won't throw silly error of a type 'Undefined variable: total in....'

/* Loop through item session array and display data */
foreach($_SESSION["items"] as $item){
?>
<tr class='itemInCardRow'>
<td class='itemInCartDisplay'>
<img class='img-responsive item_disp_image' style='max-width:80px; float:left;' src="images/<?php echo $item["item_image"]; ?>">
</td>

<td class='itemInCartDisplay'>
<?php echo $item["item_name"] .", size ". $item["item_size"]; ?>

<td class='itemInCartDisplay'>
<a href='#' class='subtruct_itm_qty quantity_change' item_id="<?php echo $item["item_id"]; ?>">-</a>
<?php echo "<span class='quantity'>Cantidad ".$item["item_qty"]."</span>"; ?>
<a href='#' class='add_itm_qty quantity_change' item_id="<?php echo $item["item_id"]; ?>">+</a>
</td>

<td class='itemInCartDisplay'>
<?php echo "$".sprintf("%.3f", ($item["item_price"] * $item["item_qty"])); ?>
</td>
<td class='itemInCartDisplay'>
<a href="#" class="remove_item_from_cart" item_id="<?php echo $item["item_id"]; ?>">x</a>
</td>
</tr>

<?php
/* Calculate Total */
$total += ($item["item_price"] * $item["item_qty"]);
}  // Close foreach loop
?>
<!-- This part displays Checkout button and price total -->
<tr>
<td class='itemInCartDisplay' colspan='4'>
<div>
<a href='checkOut.php' title="Review Cart and Check-Out"><button type="button" class="btn checkoutButton">Pagar</button></a>
<!--                        <a class="checkoutButton" href="view_cart.php" CHECKOUT</a>            -->
</div>
</td>
<td class='itemInCartDisplay' style='text-align:right;'>
<div class="cart-products-total">
<span>Total : <span style='font-size:20px; color:#008cba;'></span>
<?php
// Return a total price with 2 decimals
echo "$".sprintf("%.3f",$total);
?>
</span>
</div>
</td>
</tr>
</table>

<?php

}else{
/*  Information about empty shopping cart  - exit() function prints a message and exits current script
Can be used as die() */
exit("No tienes items en el carrito");
}
}

/* Add item quantity - Allow maximum 5 of each item to be added  */
if(isset($_GET["add_itm_qty"]) && isset($_SESSION["items"])){
if(isset($_SESSION['items'][$_GET["add_itm_qty"]])){
if($_SESSION['items'][$_GET["add_itm_qty"]]["item_qty"] <= 4){
$_SESSION['items'][$_GET["add_itm_qty"]]["item_qty"]+=1;
}else{
$_SESSION['items'][$_GET["add_itm_qty"]]["item_qty"]=5;
}
}
unset($_GET["add_itm_qty"]);
exit(json_encode(array('items_in_cart'=>count($_SESSION['items']),(array('all_items'=>$_SESSION["items"])))));
}

/* Subtract item quantity - deduct qty ONLY if item_qty is NOT smaller than 0  */
if(isset($_GET["subtruct_itm_qty"]) && isset($_SESSION["items"])){
if(isset($_SESSION['items'][$_GET["subtruct_itm_qty"]])){
if($_SESSION['items'][$_GET["subtruct_itm_qty"]]["item_qty"] >= 2){
$_SESSION['items'][$_GET["subtruct_itm_qty"]]["item_qty"]-=1;
}else{
$_SESSION['items'][$_GET["subtruct_itm_qty"]]["item_qty"]=1;
}
}
unset($_GET["subtruct_itm_qty"]);
/* Get item quantity and output it in json format */
exit(json_encode((array('item_qty'=>$_SESSION["items"]))));
}

/* Remove item from shopping cart */
if(isset($_GET["remove_item_from_cart"]) && isset($_SESSION["items"])){
$item_id = $_GET["remove_item_from_cart"];
/* Check if item is ina item session array */
if(isset($_SESSION["items"][$item_id])){
unset($_SESSION["items"][$item_id]);  // Remove/unset item
}
/* Calculate total number of items in cart and output it in json format */
exit(json_encode(array('items_in_cart'=>count($_SESSION['items']))));
}