递增会话金额PHP

我正在使用会话来填充简单的购物车，但是，如果在session['cart']内已存在item_id，我会在itemAmount增加时遇到一些问题。递增会话金额PHP

我一直在尝试在这里增加：$itemAmount = $eachItem['itemAmount'];但是，无法让它工作。

这是我目前所拥有的;

UPDATED;具有更好命名的代码，我仍然需要有关获取cart_item_amount增量的帮助，此时它每次都会创建一个新项目，而不是递增cart_item_amount。

<?php 
if (!isset($_SESSION)) { 
    session_start(); 
} 
// create the cart session 
if(!isset($_SESSION['cart'])) { 
    $_SESSION['cart'] = array(); 
} 
?> 
<?php 
// if all posts are fine 
if(isset($_POST['item_id'])) { 

    // set post values 
    $post_item_id = $_POST['item_id']; 
    $post_item_name = $_POST['item_name']; 
    $post_options = $_POST['item_options']; 
    $post_item_extras = $_POST['item_extras']; 

    // set initial item amount 
    $item_total = 1; 

    foreach($_SESSION['cart'] as $key => $value) { 

     if($value['cart_item_id'] == $post_item_id) { 

      $value['cart_item_amount']++; 
      $item_total = $value['cart_item_amount']; 

     }else{ 

     } 
    } 
    // if option selected 
    if(isset($post_options)) { 

     // split to get two separate values 
     list($post_item_cost, $post_option_name) = explode("-", $post_options, 2); 

    } 

    // loop through extras   
    if(isset($post_item_extras)) { 

     foreach($post_item_extras as $key => $value) { 

      // split to get two separate values 
      list($post_extra_cost, $post_extra_name) = explode("-", $value, 2); 

      // create extras array 
      $item_extras[] = array(
       'cart_extra_cost' => $post_extra_cost, 
       'cart_extra_name' => $post_extra_name 
      ); 

     } 
    } 

    // add each item to an array 
    $cart_row = array(
     'cart_item_id' => $post_item_id, 
     'cart_item_name' => $post_item_name, 
     'cart_option_name' => $post_option_name, 
     'cart_item_cost' => $post_item_cost, 
     'cart_item_amount' => $item_total, 
     // add the extras array 
     'cart_item_extras' => $item_extras 
    ); 

     // add new row to the session Cart 
     $_SESSION['cart'][] = $cart_row; 
} 
?> 

Array 
(
    [cart] => Array 
     (
      [0] => Array 
       (
        [cart_item_id] => 76 
        [cart_item_name] => Cheese Burger 
        [cart_option_name] => Small 
        [cart_item_cost] => 1.00 
        [cart_item_amount] => 1 
        [cart_item_extras] => 
       ) 

      [1] => Array 
       (
        [cart_item_id] => 76 
        [cart_item_name] => Cheese Burger 
        [cart_option_name] => Small 
        [cart_item_cost] => 1.00 
        [cart_item_amount] => 2 
        [cart_item_extras] => 
       ) 

      [2] => Array 
       (
        [cart_item_id] => 76 
        [cart_item_name] => Cheese Burger 
        [cart_option_name] => Small 
        [cart_item_cost] => 1.00 
        [cart_item_amount] => 3 
        [cart_item_extras] => 
       ) 

     ) 

)

来源

2013-04-06 monsterboy

if($eachItem['itemID'] = $_POST['item_id']) {

=不是比较操作，见 http://php.net/manual/en/language.operators.comparison.php

应该

if($eachItem['itemID'] == $_POST['item_id']) {

来源

2013-04-06 10:40:53 joschua011

也更好的名字，$如果还有一个$ ITEMID和$ ITEM_NAME和$ ITEMNAME ... – joschua011 2013-04-06 10:42:54

由于错过了，得到它现在的工作ITEM_ID并不明显。我即将改变命名，我明白你的意思。 – monsterboy 2013-04-06 10:51:29

发言太快，已更新我的帖子 – monsterboy 2013-04-06 11:41:55

得到它只需使用这方面的工作;

foreach($_SESSION['cart'] as $key => $value) { 

    if($value['cart_item_id'] == $post_item_id) { 

     $_SESSION['cart'][$key]['cart_item_amount']++; 

     return false; 

}

来源

2013-04-07 08:06:01 monsterboy

递增会话金额PHP

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