PHP数组-为每个唯一的电子邮件地址发送一封电子邮件,将数据分组在一起

我在数组中有不确定数量的项目：

$query = MysqL_query("SELECT * FROM orders WHERE orderID = '$orderID'");        

while($row = MysqL_fetch_array($query)){
   $items[] = $row[itemnumber];
   $quantity[] = $row[quantity];
   $vendoremail[] = $row[vendoremail];
} 

数组中的值可能是这样的：

 $items = ("A","B", "C");
    $quantity = ("2", "1", "3");
    $vendoremail = ("[e-mail]", "[e-mail]", "[e-mail]");

我想对来自相同电子邮件地址的数据进行分组,然后向每个地址发送一封电子邮件.

因此,一封电子邮件会发送到[e-mail],邮件正文中包含项目“ A”和“ C”,数量为“ 2”和“ 3”.

然后,另一封电子邮件发送到[e-mail],邮件正文中带有项目“ B”和数量“ 1”.

有人知道实现此目标的最佳方法吗？

解决方法:

您可以通过GROUP_CONCAT()将值分组为逗号分隔的字符串,并可以选择将其拆分回PHP中：

SELECT 
  GROUP_CONCAT(itemnumber) AS items,
  GROUP_CONCAT(quantity) AS quantities,
  vendoremail
FROM orders
WHERE orderid = '$orderID'
GROUP BY vendoremail

这将产生如下结果：

[e-mail]    A,C    2,3
[e-mail]    B      1

在PHP中,如果需要,可以将explode()列表退回到数组中,以显示在电子邮件正文中.

$results = array();
while($row = MysqL_fetch_array($query)){
   $results[] = $row; 
}
foreach ($results as $result) {
  $email = $result['vendoremail'];
  $items = explode(",", $result['items']); // Now it's an array...
  $quantities = explode(",", $result['quantities']);  // Now it's an array...
}