php - 无法正确创建数组

Question

我的问题有点长，请耐心等待

我有 2 张 table productsize和 cart .我已经加入了 2 个表并创建了一个数组，但是这个数组的一部分我没有正确获取数据。产品尺寸表包含有 4 种尺寸(小、中、大、每件)的产品。

我从 2 个表中得到的数组类似于以下数组，这里的主要部分是在 4 个数组中:- size、cost、puredsize、puredquantity 0 索引值应该保留给小，1 代表中 2 代表大每件 3 件。

Array
(
    [0] => Array
        (
            [productid] => 1
            [size] => Array
                (
                    [0] => small //reserved for small
                    [1] => medium //reserved for medium
                    [2] => large //reserved for large
                    [3] => 0 //reserved for perpiece
                )
            [cost] => Array
                (
                    [0] => 10 //reserved for small
                    [1] => 20 //reserved for medium
                    [2] => 30 //reserved for large
                    [3] => 0 //reserved for perpiece
                )
            [purchasedsize] => Array
                (
                    [0] => small //reserved for small
                    [1] => 0 //reserved for medium
                    [2] => large //reserved for large
                    [3] => 0 //reserved for perpiece
                )
            [purchasedquantity] => Array
                (
                    [0] => 2 //reserved for small
                    [1] => 0 //reserved for medium
                    [2] => 3 //reserved for large
                    [3] => 0 //reserved for perpiece
                )
        )
)

问题是这种定位在数组大小和成本方面工作正常，但在已购买的大小、已购买的数量中，如果购物车具有每件大小的产品，则它会转换为索引值 0

数组变成如下所示，但在购买尺寸和购买数量下，每件应该在索引值 3

Array
(
    [0] => Array
        (
            [productid] => 2
            [size] => Array
                (
                    [0] => 0
                    [1] => 0
                    [2] => 0
                    [3] => perpiece
                )
            [cost] => Array
                (
                    [0] => 0
                    [1] => 0
                    [2] => 0
                    [3] => 40
                )
            [purchasedsize] => Array
                (
                    [0] => perpiece
                    [1] => 0
                    [2] => 0
                    [3] => 0
                )
            [purchasedquantity] => Array
                (
                    [0] => 1
                    [1] => 0
                    [2] => 0
                    [3] => 0
                )
        )
)

产品尺寸表

id  productid   prodsize   cost
1     1          small      10
2     1          medium     20
3     1          large      30
4     2          perpiece   40

购物车 table

id  productid  prodsize  prodcost  quantity
1     1         small      10        2
2     1         large      30        3
3     2         perpiece   40        1

我正在使用的代码是

$sql= "SELECT p.productid, GROUP_CONCAT(p.prodsize ORDER BY p.id ASC) as size, GROUP_CONCAT(p.cost ORDER BY p.id ASC) as cost, GROUP_CONCAT(c.prodsize,'-',c.quantity) as cart_details, GROUP_CONCAT(DISTINCT(c.userid)) as user_id FROM productsize p LEFT JOIN cart c ON(c.productid = p.productid AND p.prodsize = c.prodsize) GROUP BY p.productid ORDER BY user_id DESC, p.productid ASC";
$result = mysql_query($sql);
if (mysql_num_rows($result) > 0) 
    {
        $i = 0;
        while($row = mysql_fetch_assoc($result))
            {
                $rows[$i]['productid'] =  $row['productid'];
                $final_size = array_fill(0, 4, '0');
                $final_cost = array_fill(0, 4, '0');


                $size = explode(',', $row['size']);
                $cost = explode(',', $row['cost']);

                foreach($size as $k=>$sizecol) {
                    switch($sizecol) {
                        case 'Small':
                            $array_key = '0';
                            break;
                        case 'Medium':
                            $array_key = '1';
                            break;
                        case 'Large':
                            $array_key = '2';
                            break;
                        case 'Perpiece':
                            $array_key = '3';
                            break;
                    }
                    $final_size[$array_key] = $sizecol;
                    $final_cost[$array_key] = $cost[$k];

                }


                $cart_details = explode(',', $row['cart_details']);
                $purchasedsize = array_fill(0, 4, '0'); 
                $purchasedquantity = array_fill(0, 4, '0');
                foreach($cart_details as $cart) {
                    if($cart != '') {
                        $details = explode('-', $cart);
                        $key = array_search($details[0], $size);

                        $purchasedsize[$key] = $details[0];
                        $purchasedquantity[$key] = $details[1];
                    }

                }

                $rows[$i]['size'] = $final_size;
                $rows[$i]['cost'] = $final_cost;
                $rows[$i]['purchasedsize'] = $purchasedsize;
                $rows[$i]['purchasedquantity'] = $purchasedquantity;
                $rows[$i]['userid'] = $row['user_id'];

                $i++; 
            }   
    }

Answer 1

删除了我没有的用户详细信息并尝试使用小写的数据。请看一看

$sql= "SELECT p.productid, GROUP_CONCAT(p.prodsize ORDER BY p.id ASC) as size, GROUP_CONCAT(p.cost ORDER BY p.id ASC) 
    as cost, GROUP_CONCAT(c.prodsize,'-',c.quantity) as cart_details FROM productsize p 
    LEFT JOIN cart c ON(c.productid = p.productid AND p.prodsize = c.prodsize) 
    GROUP BY p.productid ORDER BY p.productid ASC";
$result = mysql_query($sql);
    if (mysql_num_rows($result) > 0) {
        $i = 0;
        while($row = mysql_fetch_assoc($result))
            {
                $purchasedData  = array();                
                $purchasedsize  =  $purchasedquantity =  $final_size =  $final_cost = array_fill(0, 4, '0');
                $size           = explode(',', $row['size']);
                $cost           = explode(',', $row['cost']);                
                $cart_details   = explode(',', $row['cart_details']);
                foreach($cart_details as $cart) {
                    if($cart != '') {
                        $details = explode('-', $cart);
                        $key     = array_search($details[0], $size);
                        $purchasedData[$details[0]] = $details[1];
                    }
                }
                foreach($size as $k => $sizecol) {
                    switch($sizecol) {
                        case 'small':
                            $array_key = '0';
                            break;
                        case 'medium':
                            $array_key = '1';
                            break;
                        case 'large':
                            $array_key = '2';
                            break;
                        case 'perpiece':
                            $array_key = '3';
                            break;
                    }
                    $final_size[$array_key] = $sizecol;
                    $final_cost[$array_key] = $cost[$k];
                    if ($purchasedData[$sizecol]) {
                        $purchasedsize[$array_key] = $sizecol;
                        $purchasedquantity[$array_key] = $purchasedData[$sizecol];
                    }
                }
                $rows[$i]['productid']          =  $row['productid'];
                $rows[$i]['size']               = $final_size;
                $rows[$i]['cost']               = $final_cost;
                $rows[$i]['purchasedsize']      = $purchasedsize;
                $rows[$i]['purchasedquantity']  = $purchasedquantity;
                $rows[$i]['userid']             = $row['user_id'];
                $i++; 
            }   
    }
    echo "<pre>";
    print_r($rows);
    echo "</pre>";