Question

我将一个数组设置为$ _SESSION [＆＃34; cart_array＆＃34;]，当项目在购物车中时，输出就是这样。

Array ( [0] => Array ( [item_id] => 1 [quantity] => 6 ) [1] => Array ( [item_id] => 2 [quantity] => 1 ) )

我正在尝试创建一个foreach循环来完成并计算＆＃34;数量＆＃34;获取总购物车项目的数值，到目前为止我有以下但我无法弄清楚如何将其变为字符串变量，以便我可以在其他页面上显示它。

    $cartCount = array();
if (!isset($_SESSION["cart_array"]) || count($_SESSION["cart_array"]) < 1) {
    $cartCount = 0;
} else {
    foreach ($_SESSION["cart_array"] as $each_item) {
        //$cartCount += $each_item['quantity']; <-- commented out as not working.
        //$cartCount[$each_item['item_id']] += $each_item['quantity']; <-- commented out as not working.
    }
    //Print array for debugging purposes
    print_r($_SESSION["cart_array"]);
}

Answer 1

这必须起作用：

<?php

session_start();

$cartCount = 0;
if(isset($_SESSION['cart_array']) AND is_array(@$_SESSION['cart_array'])){
    foreach($_SESSION['cart_array'] AS $each_item){
        $cartCount = $cartCount + $each_item['quantity'];
    }
}

echo $cartCount;

?>

PHP计数数组数量

1 个答案: