我有两个表:product和cart，我希望结合这两个表，并根据特定条件在数组中显示数据，如下所示:
一个特定类别下的所有产品都应该显示，如果特定用户购买了给定产品中的任何产品那么它的详细信息也应该显示在产品的前面
到目前为止我所做的代码是
$catid = $_REQUEST['catid'];
$userid = $_REQUEST['userid'];
$sql = "select * from productsize where catid = '".$catid."' GROUP BY productid";
$result = mysqli_query($con, $sql);
if (mysqli_num_rows($result) > 0)
{
while($row = mysqli_fetch_assoc($result))
{
$rows['catid'] = $row['catid'];
$rows['catname'] = $row['catname'];
$rows['productid'] = $row['productid'];
$rows['prodname'] = $row['prodname'];
$rows['prodimg'] = $row['prodimg'];
$row2[]=$rows;
}
}
echo "<pre>";
print_r($row2);
echo "</pre>";
它给出一个像这样的数组
Array
(
[0] => Array
(
[catid] => 2
[catname] => C1
[productid] => 13
[prodname] => P1
[prodimg] =>
)
[1] => Array
(
[catid] => 2
[catname] => C1
[productid] => 14
[prodname] => P1
[prodimg] =>
)
[2] => Array
(
[catid] => 2
[catname] => C1
[productid] => 15
[prodname] => P3
[prodimg] =>
)
)
但是我想要替换上面数组的最后一个数组是
Array
(
[0] => Array
(
[catid] => 2
[catname] => C1
[productid] => 13
[prodname] => P1
[prodimg] =>
[size] => Array
(
[0] => small
[1] => medium
[2] => large
[3] => perpiece
)
[cost] => Array
(
[0] => 10
[1] => 20
[2] => 30
[3] => 12
)
[purchasedsize] => Array
(
[0] => small
[1] => 0
[2] => large
[3] => 0
)
[purchasedquantity] => Array
(
[0] => 2
[1] => 0
[2] => 1
[3] => 0
)
[userid] => 1
)
[1] => Array
(
[catid] => 2
[catname] => C1
[productid] => 14
[prodname] => P1
[prodimg] =>
[size] => Array
(
[0] => small
[1] => medium
[2] => large
[3] => 0
)
[cost] => Array
(
[0] => 15
[1] => 20
[2] => 25
[3] => 0
)
[purchasedsize] => Array
(
[0] => 0
[1] => medium
[2] => 0
[3] => 0
)
[purchasedquantity] => Array
(
[0] => 0
[1] => 1
[2] => 0
[3] => 0
)
[userid] => 1
)
[2] => Array
(
[catid] => 2
[catname] => C1
[productid] => 15
[prodname] => P3
[prodimg] =>
[size] => Array
(
[0] => 0
[1] => medium
[2] => 0
[3] => perpiece
)
[cost] => Array
(
[0] => 0
[1] => 20
[2] => 0
[3] => 18
)
[purchasedsize] => Array
(
[0] => 0
[1] => 0
[2] => 0
[3] => 0
)
[purchasedquantity] => Array
(
[0] => 0
[1] => 0
[2] => 0
[3] => 0
)
[userid] => 0
)
)
产品表的视图(正如您将看到的，产品表带有一个productid，每个productid下面有最大4个大小(不会超过4个))
id catid catname productid prodsize cost prodname prodimg
1 2 C1 13 small 10 P1
2 2 C1 13 medium 20 P1
3 2 C1 13 large 30 P1
4 2 C1 13 perpiece 12 P1
5 2 C1 14 small 15 P2
6 2 C1 14 medium 20 P2
7 2 C1 14 large 25 P2
8 2 C1 15 perpiece 18 P3
9 2 C1 15 medium 20 P3
购物车表视图
id catid catname userid productid prodname prodsize quantity prodcost
1 2 C1 1 13 P1 large 1 30
2 2 C1 1 13 P1 small 2 10
3 2 C1 1 14 P2 medium 1 20
谁能帮我得到所需的数组作为结果?
试试这个
$catid = $_REQUEST['catid'];
$userid = $_REQUEST['userid'];
$sql= "SELECT p.catid, p.catname, p.productid, p.prodimg,
GROUP_CONCAT(p.prodsize ORDER BY p.id ASC) as size,
GROUP_CONCAT(p.cost ORDER BY p.id ASC) as cost, p.prodname,
GROUP_CONCAT(c.prodsize,'-',c.quantity) as cart_details, GROUP_CONCAT(DISTINCT(c.userid)) as user_id
FROM products p
LEFT JOIN cart c ON(c.productid = p.productid AND c.userid = '$userid' AND p.prodsize = c.prodsize)
WHERE p.catid ='$catid'
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]['catid'] = $row['catid'];
$rows[$i]['catname'] = $row['catname'];
$rows[$i]['productid'] = $row['productid'];
$rows[$i]['prodname'] = $row['prodname'];
$rows[$i]['prodimg'] = $row['prodimg'];
$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'); //Since you displayed this array has 4 values only
$purchasedquantity = array_fill(0, 4, '0');
foreach($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'];
$i++;
}
}
echo "<pre>";
print_r($rows);
echo "</pre>";
输出数组
Array
(
[0] => Array
(
[catid] => 2
[catname] => c1
[productid] => 13
[prodname] => P1
[prodimg] =>
[size] => Array
(
[0] => small
[1] => medium
[2] => large
[3] => perpiece
)
[cost] => Array
(
[0] => 10
[1] => 20
[2] => 30
[3] => 12
)
[purchasedsize] => Array
(
[0] => small
[1] => 0
[2] => large
[3] => 0
)
[purchasedquantity] => Array
(
[0] => 2
[1] => 0
[2] => 1
[3] => 0
)
[userid] => 1
)
[1] => Array
(
[catid] => 2
[catname] => c1
[productid] => 14
[prodname] => P2
[prodimg] =>
[size] => Array
(
[0] => small
[1] => medium
[2] => large
[3] => 0
)
[cost] => Array
(
[0] => 15
[1] => 20
[2] => 25
[3] => 0
)
[purchasedsize] => Array
(
[0] => 0
[1] => medium
[2] => 0
[3] => 0
)
[purchasedquantity] => Array
(
[0] => 0
[1] => 1
[2] => 0
[3] => 0
)
[userid] => 1
)
[2] => Array
(
[catid] => 2
[catname] => C1
[productid] => 15
[prodname] => P3
[prodimg] =>
[size] => Array
(
[0] => 0
[1] => medium
[2] => 0
[3] => perpiece
)
[cost] => Array
(
[0] => 0
[1] => 20
[2] => 0
[3] => 18
)
[purchasedsize] => Array
(
[0] => 0
[1] => 0
[2] => 0
[3] => 0
)
[purchasedquantity] => Array
(
[0] => 0
[1] => 0
[2] => 0
[3] => 0
)
[userid] =>
)
)