购物车：将更多商品添加到购物车数组中

Question

如何将多件商品添加到购物车中？

这是html表单，

<form action="cart.php?action=add" method="post" id="form-cart">
    <input type="text" name="cart[unique_id]" value="<?php echo $product->unique_id;?>" size="3" maxlength="3" />
    <input type="text" name="cart[quantity_stock]" value="<?php echo $product->in_stock;?>" size="3" maxlength="3" />
    <input type="submit" value="Add to cart" />
</form>

这是cart类中的add_item方法，

 public function add_item($info)
{

    # Check if the content array does not exist yet.
    if (isset($this->content[0]['unique_id'])) 
    {
        $i = 0;
        $this->content[$i]['unique_id'] = $this->content[$i]['unique_id'];
        $this->content[$i]['quantity_request']++;
        $this->content[$i]['quantity_stock'] = $this->content[$i]['quantity_stock'];
        $this->content[$i]['time_created'] = time();
        $i += $i;

        # Check if the quantity request exceeds quanity in stock.
        if($this->content[$i]['quantity_request'] > $this->content[$i]['quantity_stock'])
        {
            # If it does, then set the quantity request to quanity in stock.
            $this->content[$i] = array(
                'unique_id' => $this->content[$i]['unique_id'], 
                'quantity_request' => $this->content[$i]['quantity_stock'], 
                'quantity_stock' => $this->content[$i]['quantity_stock'],
                'time_created' => time(),
                'error' => 'The quantity you requested on this item is exceeding the quantity in our stock.'
            );
        }
    } 
    else 
    {
        //$this->content[$unique_id] = array('quantity_request' => 1, 'quantity_stock' => $this->content[$unique_id]['quantity_stock'],'time_created' => time());

        # Create the content array, $unique_id as the key.
        # If it does, then set the quantity request to quanity in stock.
        $this->content[0] = array(
            'unique_id' => $info['unique_id'],
            'quantity_request' => 1,
            'quantity_stock' => $info['quantity_stock'],
            'time_created' => time()
        );
    }

}

所以，当我在类中已有一个项目后，

array
  0 => 
    array
      'unique_id' => string '1386638969582999' (length=16)
      'quantity_request' => int 1
      'quantity_stock' => string '10' (length=2)
      'time_created' => int 1322429496

数组应该增加另一个项目我提交了另一个像这样的项目，

html，

<form action="cart.php?action=add" method="post" id="form-cart">
    <input type="text" name="cart[<?php echo $product->unique_id;?>][quantity_stock]" value="<?php echo $product->in_stock;?>" size="3" maxlength="3" />
    <input type="submit" value="Add to cart" />
</form>

php，

array
  0 => 
    array
      'unique_id' => string '1386638969582999' (length=16)
      'quantity_request' => int 1
      'quantity_stock' => string '11' (length=2)
      'time_created' => int 1322429496

  1 => 
    array
      'unique_id' => string '1386638969582900' (length=16)
      'quantity_request' => int 1
      'quantity_stock' => string '10' (length=2)
      'time_created' => int 1322429400

但是我总是只得到一个项目，并且请求数量不断增加，

array
      0 => 
        array
          'unique_id' => string '1386638969582999' (length=16)
          'quantity_request' => int 2
          'quantity_stock' => string '10' (length=2)
          'time_created' => int 1322429496

请注意，它现在在 'quantity_request' => 中变成了 2 。 int 2

仅当再次单击相同的 unique_id 时，quantity_request 才会增加。

我怎样才能做到这一点？

编辑：

html、

<form action="cart.php?action=add" method="post" id="form-cart">
    <input type="text" name="cart[<?php echo $product->unique_id;?>][quantity_stock]" value="<?php echo $product->in_stock;?>" size="3" maxlength="3" />
    <input type="submit" value="Add to cart" />
</form>

php、

public function add_item($item_array)
    {

        foreach ($item_array as $unique_id => $info)
        {

            # Check if the content array does not exist yet.
            if (isset($this->content[$unique_id])) 
            {
                $this->content[$unique_id]['quantity_request']++;
                $this->content[$unique_id]['quantity_stock'] = $this->content[$unique_id]['quantity_stock'];
                $this->content[$unique_id]['time_created'] = time();

                # Check if the quantity request exceeds quanity in stock.
                if($this->content[$unique_id]['quantity_request'] > $this->content[$unique_id]['quantity_stock'])
                {
                    # If it does, then set the quantity request to quanity in stock.
                    $this->content[$unique_id] = array(
                        'quantity_request' => $this->content[$unique_id]['quantity_stock'], 
                        'quantity_stock' => $this->content[$unique_id]['quantity_stock'],
                        'time_created' => time(),
                        'error' => 'The quantity you requested on this item is exceeding the quantity in our stock.'
                    );
                }
            } 
            else 
            {
                //$this->content[$unique_id] = array('quantity_request' => 1, 'quantity_stock' => $this->content[$unique_id]['quantity_stock'],'time_created' => time());

                # Create the content array, $unique_id as the key.
                # If it does, then set the quantity request to quanity in stock.
                $this->content[$unique_id] = array(
                    'quantity_request' => 1,
                    'quantity_stock' => $info['quantity_stock'],
                    'time_created' => time()
                );
            }

        }
    }

Answer 1

您在开始时将 $i 重置为 0，从而使 $i++ 变得无关紧要，因此当您添加另一个条目时，它会覆盖旧的条目。尝试 $this->content[] 这样它就添加到最后一个。