Question

I m doing the following but it doesn t work. it only has 1 item in the array no matter how many i add

一个人能够告诉我,什么是错做的。

session_start();

$pid = mysql_real_escape_string(trim($_GET["pid"]));
$price = mysql_real_escape_string(trim($_GET["price"]));
$quantity = mysql_real_escape_string(trim($_GET["quantity"]));

if (!isset($_SESSION[ cart ])) {
    $_SESSION[ cart ] = array();

    $_SESSION[ cart ][ pid ] = $pid;
    $_SESSION[ cart ][ total_price ] = $price;
    $_SESSION[ cart ][ total_items ] = $quantity;

}else{
    $_SESSION[ cart ][ pid ] = $pid;
    $_SESSION[ total_price ] += $price;
    $_SESSION[ total_items ]  += $quantity;
}

Answer 1

它像你一样,正在重新确定阵列中的价值观。每当你确定“SESSION[t ][ pid]美元时,你都会重写最后价值。然而,你的总价格和总产值很可能是正确地增加吗?

使用<代码>_SESSION [ cart ][ pid ][] = pid; 相反。你们需要大量的补助,以便你们能够拥有多个物品。 []运营商将价值视为阵列,并将新的价值推到阵列的末尾。

EDIT: Your initialization under the if should look like the following so that your [ pid ] is an array of pid s:

$_SESSION[ cart ] = array();
$_SESSION[ cart ][ pid ] = array(); //this might be redundant...but I always initialize my variables
$_SESSION[ cart ][ pid ][] = $pid;
$_SESSION[ cart ][ total_price ] = $price;
$_SESSION[ cart ][ total_items ] = $quantity;

在<代码>下您将:

$_SESSION[ cart ][ pid ][] = $pid;
$_SESSION[ cart ][ total_price ] += $price;
$_SESSION[ cart ][ total_items ] += $quantity;

注:You forgot [ cart] on the total_price and total_items under the else, as was referred to in other response.

Answer 2

Looks like you forgot to add the [ cart ] to the bottom two $_SESSION setters:

$_SESSION[ total_price ] += $price;
$_SESSION[ total_items ]  += $quantity;

变化

$_SESSION[ cart ][ total_price ] += $price;
$_SESSION[ cart ][ total_items ]  += $quantity;

Answer 3

$_SESSION[ cart ][ pid ] = $pid; 
$_SESSION[ total_price ] += $price; 
$_SESSION[ total_items ]  += $quantity;

您在座右铭上 for。应:

$_SESSION[ cart ][ pid ] = $pid; 
$_SESSION[ cart ][ total_price ] += $price; 
$_SESSION[ cart ][ total_items ]  += $quantity;

Answer 4

您在最后一届会议期间希望其他声明的变量。

See this, for a list of range reference functions in php.

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