如何仅将购物车仅限于同一卖家？ （PHP）

Question

我目前正在做一项功能，由于我的网站的有意限制和讲师的指示，我的“添加到购物车”功能仅允许同一卖家使用，我希望“添加到购物车”功能只允许用户/买家仅添加来自同一卖家的自行车。

如果他们来自不同的卖家，则会出现一个简单的警告框，通知他们无法从不同的卖家购买自行车，并且他们尝试添加的自行车将不会添加到购物车中。

  <form method='POST' action='cart.php?action=addCart&BicycleID=<?php echo $row["BicycleID"]; ?>'>
                                         <p style="color:black;float:center;margin-top:5px;">Quantity: <input type='number' name='gadget_quantity' value='0' style="width:20%;color:black;" min="1" max="5"></p>
                                        
                                 <?php
                                
                                $colors=explode("," , $row['BicycleColor']);
                                $colors = array_diff($colors, array(""));
                                    
                                ?>
                                 
                                    <select name="visible_color" style="width:200px;margin-bottom:10px;">
                                     
                                    <?php
                                            foreach($colors as $color):
                                            $color = trim($color);
                                            echo '<option value="'.$color.'">'.$color.'</option>'; //close your tags!!
                                            endforeach;
                                    ?>
                                     
                                   </select>
                                        
                                        <button  name='addCart' class="btn btn-default add-to-cart" style="margin-top:2px;"><i class="fa fa-shopping-cart"></i>Add To Cart</button>
                                    
                                    <input type='hidden' name='hidden_id' value="<?php echo $row["BicycleID"];?>">    
                                    <input type='hidden' name='hidden_name' value="<?php echo $row["BicycleName"];?>">  
                                    <input type='hidden' name='hidden_price' value="<?php echo $row["BicyclePrice"];?>">
                                    <input type='hidden' name='hidden_image' value="<?php echo $row["BicycleImage"];?>">
                                    <input type='hidden' name='hidden_seller' value="<?php echo $row["AccountUsername"];?>">
                                    <input type='hidden' name='hidden_bank' value="<?php echo $row["SellerBank"];?>">    
 </form>

我只需要一个解决方案，每次将自行车添加到购物车时都会进行检查，检查作为第一个自行车添加到购物车中的卖家是否不允许下一个自行车来自不同的卖家，除非用户/买家清除如果购物车带有“全部删除”按钮，则可以选择不同的卖家，但规则仍然适用，即只允许添加与添加到购物车的第一辆自行车相同的卖家。下面的代码位于购物车页面，添加的自行车将显示在此处。希望这足够清楚，请告诉我。

<?php 
include('dbconnect.php');

if (isset($_POST["addCart"])){
    if (isset($_SESSION["cart"][0])){
        $item_array_id = array_column($_SESSION["cart"],"BicycleID");
        if (!in_array($_GET["BicycleID"],$item_array_id)){
            $count = count($_SESSION["cart"]);
            $item_array = array(
                'BicycleID' => $_POST["hidden_id"],
                'BicycleName' => $_POST["hidden_name"],
                'BicyclePrice' => $_POST["hidden_price"],
                'BicycleImage' => $_POST["hidden_image"],
                'BicycleColor' => $_POST["visible_color"],
                'AccountUsername' => $_POST["hidden_seller"],
                'SellerBank' => $_POST["hidden_bank"],
                'gadget_quantity' => $_POST["gadget_quantity"],
            );
            $_SESSION["cart"][$count] = $item_array;
            echo '<script>window.location="cart.php"</script>';           
        
         }
        else{
            echo '<script>alert("Product is already Added to Cart")</script>';
            echo '<script>window.location="cart.php"</script>';
        }
    }
    else{
        $item_array = array(
            'BicycleID' => $_POST["hidden_id"],
            'BicycleName' => $_POST["hidden_name"],
            'BicyclePrice' => $_POST["hidden_price"],
            'BicycleImage' => $_POST["hidden_image"],
            'BicycleColor' => $_POST["visible_color"],
            'AccountUsername' => $_POST["hidden_seller"],
            'SellerBank' => $_POST["hidden_bank"],
            'gadget_quantity' => $_POST["gadget_quantity"],
        );
        $_SESSION["cart"][0] = $item_array;
    }
}

if (isset($_GET["action"])){
    if ($_GET["action"] == "empty"){
       unset($_SESSION["cart"]);
    }
    
}  
if (isset($_GET["action"])){
    if ($_GET["action"] == "delete"){
        foreach ($_SESSION["cart"] as $keys => $value){
            if ($value["BicycleID"] == $_GET["BicycleID"]){
                unset($_SESSION["cart"][$keys]);
                echo '<script>alert("Bicycle has been Removed")</script>';
                echo '<script>window.location="cart.php"</script>';
            }
        }
    }
    
} 

？>

Answer 1

似乎您只需要一个条件 - ＆gt; $ _ post [“ hidden_​​seller”] == $ _session [“ cart”] [0] ['shidend_seller']

<?php 
include('dbconnect.php');

if (isset($_POST["addCart"])){
    if (isset($_SESSION["cart"][0])){
        $item_array_id = array_column($_SESSION["cart"],"BicycleID");
        if (!in_array($_GET["BicycleID"],$item_array_id)){
            if($_POST["hidden_seller"] == $_SESSION["cart"][0]['hidden_seller']){

                $count = count($_SESSION["cart"]);
                $item_array = array(
                    'BicycleID' => $_POST["hidden_id"],
                    'BicycleName' => $_POST["hidden_name"],
                    'BicyclePrice' => $_POST["hidden_price"],
                    'BicycleImage' => $_POST["hidden_image"],
                    'BicycleColor' => $_POST["visible_color"],
                    'AccountUsername' => $_POST["hidden_seller"],
                    'SellerBank' => $_POST["hidden_bank"],
                    'gadget_quantity' => $_POST["gadget_quantity"],
                );
                $_SESSION["cart"][$count] = $item_array;
                echo '<script>window.location="cart.php"</script>';           
            }else{
                echo '<script>alert(" {message error } ")</script>';
                echo '<script>window.location="cart.php"</script>';

            }
         }
        else{
            echo '<script>alert("Product is already Added to Cart")</script>';
            echo '<script>window.location="cart.php"</script>';
        }
    }
    else{
        $item_array = array(
            'BicycleID' => $_POST["hidden_id"],
            'BicycleName' => $_POST["hidden_name"],
            'BicyclePrice' => $_POST["hidden_price"],
            'BicycleImage' => $_POST["hidden_image"],
            'BicycleColor' => $_POST["visible_color"],
            'AccountUsername' => $_POST["hidden_seller"],
            'SellerBank' => $_POST["hidden_bank"],
            'gadget_quantity' => $_POST["gadget_quantity"],
        );
        $_SESSION["cart"][0] = $item_array;
    }
}