使用会话在php中添加商品到购物车

时间：2017-07-06 10:32:06

标签： php jquery e-commerce

How cat looks like, there are items added twice我试图更新添加到购物车会话的数量，但下面的代码只会增加第一项添加两次的数量，然后每当添加任何其他项目两次时执行合并，小孩帮助< / p> 

$('.add-to-cart-mt').on('click', function(e){
        e.preventDefault();
        var id =$(this).attr('id');
        $('#add-to-cat-dialog').dialog({
            autoOpen:false,
            modal:true,
            hide:"pluff",
            show:"slide",
            height:200,
            open: function() { $(".ui-dialog-titlebar-close").hide(); },
            
            buttons:{
                "Add":function (){
                    $('#add-to-cat-dialog').dialog("close");
                    $.ajax({
                        url: 'add_to_cart.php',
                        data: {  productId : id },
                        
                        success: function (data) {
                            $('.top-cart-contain').empty();
                            $('.top-cart-contain').load("header_cart_summary.php");
                        },
                        
                        error :function (data, textStatus, jqXHR) {  }
                    });
                },
                
                "Cancel":function (){
                    $(this).dialog("close");
                }
            }
        });
        
        $('#add-to-cat-dialog').dialog("open");
    });
session_start();
require './database.php';

      if(!empty($_GET["productId"])) {
          $id=$_GET["productId"];
            $productById = $connection->query("SELECT * FROM products WHERE productId='$id';");
            if($productById && (mysqli_num_rows($productById)>0)){
                echo 'query ok';
                $productDetail= mysqli_fetch_assoc($productById);
                $itemArray = array(
                    $productDetail["productId"]=>array(
                        'name'=>$productDetail["productName"],
                        'id'=>$productDetail["productId"], 
                        'quantity'=>1,
                        'price'=>$productDetail["productPrice"],
                        'image'=>$productDetail["productsImage1"]
                        )
                    );
            
                if(!empty($_SESSION["cart_item"])) {
                    if(in_array($productDetail["productId"],array_keys($_SESSION["cart_item"]))) {
                        foreach($_SESSION["cart_item"] as $k => $v) {
                            if($productDetail["productId"] == $k) {
                                  if(empty($_SESSION["cart_item"][$k]["quantity"])) {
                                        $_SESSION["cart_item"][$k]["quantity"] = 0;
                                  }
                                  $_SESSION["cart_item"][$k]["quantity"] += 1;
                            }
                        }
                    } else {
                          $_SESSION["cart_item"] = array_merge($_SESSION["cart_item"],$itemArray);
                    }
                } else {
                      $_SESSION["cart_item"] = $itemArray;
                }
                
                //set product count in the bag
                if(!empty($_SESSION['cart_volume'])){
                    $_SESSION['cart_volume'] += 1;
                } else {
                    $_SESSION['cart_volume'] = 1;
                }
                
            }else {echo ''. mysqli_error($connection);}
            
      } else {
          echo 'no item';
}
[enter image description here][1]<li class="item col-lg-4 col-md-4 col-sm-6 col-xs-6 ">
                                <div class="product-item">
                                  <div class="item-inner">
                                    <div class="product-thumb has-hover-img">
                                      <figure> <a title="Ipsums Dolors Untra" href="single_product.html"> <img class="first-img" src="./productImages/<?php echo $item['productsImage1']; ?>" style="height: 250px;"  alt=""> <img class="hover-img" src="../images/products/img05.jpg" alt=""> </a></figure>
                                      <div class="pr-info-area animated animate2"><a href="quick_view.html" class="quick-view"><i class="fa fa-search"><span>Quick view</span></i></a> <a href="wishlist.html" class="wishlist"><i class="fa fa-heart"><span>Wishlist</span></i></a> <a href="compare.html" class="compare"><i class="fa fa-exchange"><span>Compare</span></i></a> </div>
                                    </div>
                                    <div class="item-info">
                                      <div class="info-inner">
                                        <div class="item-title"> <h4><a title="Ipsums Dolors Untra" href="single_product.html"><?php echo $item['productName']; ?></a></h4> </div>
                                        <div class="item-content">
                                          <div class="rating"> <i class="fa fa-star-o"></i> <i class="fa fa-star-o"></i> <i class="fa fa-star-o"></i> <i class="fa fa-star-o"></i> <i class="fa fa-star-o"></i> </div>
                                          <div class="item-price">
                                            <div class="price-box">
                                              <p class="special-price"> <span class="price-label">Special Price</span> <span class="price">Ksh. <?php echo number_format($item['productPrice'], 2) ; ?></span> </p>
                                              <!--<p class="old-price"> <span class="price-label">Regular Price:</span> <span class="price"> $567.00 </span> </p>-->
                                            </div>
                                          </div>
                                          <div class="pro-action">
                                              <button type="button" class="add-to-cart-mt" id="<?php echo $item['productId']; ?>"> <i class="fa fa-shopping-cart"></i><span> Add to Cart</span> </button>
                                          </div>
                                        </div>
                                      </div>
                                    </div>
                                  </div>
                                </div>
                              </li>

2 个答案:

答案 0 :(得分：1)

查看PHP手册：PHP Manual - array_merge()

相关部分：

  

如果输入数组具有相同的字符串键，则后面的值   该密钥将覆盖前一个密钥。 但是，如果是数组   包含数字键，后面的值不会覆盖原始值   值，但会被追加。

     

带有数字键的输入数组中的值将重新编号   在结果数组中从零开始递增键。

可能您正在使用数字ID。如果是，则将此ID转换为与您需要的ID（productIDs）

不匹配的数字序列 
$itemArray = array(
    $productDetail["productId"]=>array(
        'name'=>$productDetail["productName"],
        'id'=>$productDetail["productId"], 
        'quantity'=>1,
        'price'=>$productDetail["productPrice"],
        'image'=>$productDetail["productsImage1"]
    )
);

在本地查看此代码：

$a = array('6' => array('name'=>'john','id'=>'6','quantity'=>1));

$b = array('7' => array('name'=>'bill','id'=>'7','quantity'=>1));

$c = array('8' => array('name'=>'mike','id'=>'8','quantity'=>1));

$d = array('6' => array('name'=>'lucy','id'=>'6','quantity'=>1));

$_SESSION["cart_item"] = array_merge($a, $b, $c, $d);

var_dump($_SESSION["cart_item"]);
unset($_SESSION["cart_item"]);

$a = array('six' => array('name'=>'john','id'=>'6','quantity'=>1));

$b = array('seven' => array('name'=>'bill','id'=>'7','quantity'=>1));

$c = array('eight' => array('name'=>'mike','id'=>'8','quantity'=>1));

$d = array('six' => array('name'=>'lucy','id'=>'6','quantity'=>1));

$_SESSION["cart_item"] = array_merge($a, $b, $c, $d);

var_dump($_SESSION["cart_item"]);

我的结果是：

/am.php:13:
array(4) {
  [0] =>
  array(3) {
    'name' =>
    string(4) "john"
    'id' =>
    string(1) "6"
    'quantity' =>
    int(1)
  }
  [1] =>
  array(3) {
    'name' =>
    string(4) "bill"
    'id' =>
    string(1) "7"
    'quantity' =>
    int(1)
  }
  [2] =>
  array(3) {
    'name' =>
    string(4) "mike"
    'id' =>
    string(1) "8"
    'quantity' =>
    int(1)
  }
  [3] =>
  array(3) {
    'name' =>
    string(4) "lucy"
    'id' =>
    string(1) "6"
    'quantity' =>
    int(1)
  }
}
/am.php:26:
array(3) {
  'six' =>
  array(3) {
    'name' =>
    string(4) "lucy"
    'id' =>
    string(1) "6"
    'quantity' =>
    int(1)
  }
  'seven' =>
  array(3) {
    'name' =>
    string(4) "bill"
    'id' =>
    string(1) "7"
    'quantity' =>
    int(1)
  }
  'eight' =>
  array(3) {
    'name' =>
    string(4) "mike"
    'id' =>
    string(1) "8"
    'quantity' =>
    int(1)
  }
}

这显示了array_merge如何处理数字索引（至少使用PHP 7）。正如您所看到的，即使键入字符串的数字索引也会像数字一样处理，从而丢失了productIDs参考。

另一件事：你的代码容易受到SQL注入攻击：

$id=$_GET["productId"];
$productById = $connection->query("SELECT * FROM products WHERE productId='$id';");

在此处详细了解：PHP Manual - SQL Injection

答案 1 :(得分：0)

以下代码可以正常工作。感谢-Saleiro的投入。

[The correct output as required[1] 

  if(!empty($_GET["productId"])) {
      $id=intval($_GET["productId"]);
        $productById = $connection->query("SELECT * FROM products WHERE productId='$id' ");
        if($productById && (mysqli_num_rows($productById)>0)){
            $productDetail= mysqli_fetch_assoc($productById);
            $itemArray = array(intval($productDetail["productId"])=>array('name'=>$productDetail["productName"], 'id'=>intval($productDetail["productId"]), 'quantity'=>1, 'price'=>$productDetail["productPrice"]));

            $found = false;
            if(!empty($_SESSION["cart_item"])) {
                    foreach($_SESSION["cart_item"] as $k => $v) {
                        if($productDetail["productId"] == $v['id']) {
                            $found= true;
                            if(empty($_SESSION["cart_item"][$k]["quantity"])) {
                                  $_SESSION["cart_item"][$k]["quantity"] = 0;
                            }
                            $_SESSION["cart_item"][$k]["quantity"] += 1;
                            break;
                        }
                    }
                if(!$found) {
                      $_SESSION["cart_item"] = array_merge($_SESSION["cart_item"],$itemArray);
                }
            } else {
                  $_SESSION["cart_item"] = $itemArray;
            }
        }else {echo ''. mysqli_error($connection);}

         if(!empty($_SESSION['cart_volume'])){
                $_SESSION['cart_volume'] += 1;
            } else {
                $_SESSION['cart_volume'] = 1;
            }

  } else {
      echo 'no item';

}

相关问题
最新问题