带有PDO fetch_assoc数组的PHP按特定值排序/分组

我有一个来自PDO Fetch_assoc的var_转储数组，如：

array
  0 => 
    array
      'Client_Firstname' => string 'Sandrah' (length=...)
      'Client_Lastname' => string 'Lewis' (length=...)
      'Client_Email' => string 'san@lewis.com' (length=...)
      'Purchased_ItemId' => int '16' (length=...)
      'ItemName' => string 'MiniPad' (length=...)
      'ItemPrice' => string '500.00' (length=...)
      'ItemType' => string 'Hardware' (length=...)
      'date' => string '2013-12-12' (length=...)
  1 => 
     array
      'Client_Firstname' => string 'Derick' (length=...)
      'Client_Lastname' => string 'Smith' (length=...)
      'Client_Email' => string 'der@smith.com' (length=...)
      'Purchased_ItemId' => int '10' (length=...)
      'ItemName' => string 'MegaPad' (length=...)
      'ItemPrice' => string '1500.00' (length=...)
      'ItemType' => string 'Hardware' (length=...)
      'date' => string '2013-12-12' (length=...)
  2 => 
     array
      'Client_Firstname' => string 'Sandrah' (length=...)
      'Client_Lastname' => string 'Lewis' (length=...)
      'Client_Email' => string 'san@lewis.com' (length=...)
      'Purchased_ItemId' => int '18' (length=...)
      'ItemName' => string 'Xpower Speakers' (length=...)
      'ItemPrice' => string '300.00' (length=...)
      'ItemType' => string 'Hardware' (length=...)
      'date' => string '2013-12-12' (length=...)
  3 => 
     array
      'Client_Firstname' => string 'Sandrah' (length=1)
      'Client_Lastname' => string 'Lewis' (length=7)
      'Client_Email' => string 'san@lewis.com' (length=7)
      'Purchased_ItemId' => int '7' (length=7)
      'ItemName' => string 'Lion Belt' (length=7)
      'ItemPrice' => string '800.00' (length=7)
      'ItemType' => string 'Fashion' (length=7)
      'date' => string '2013-12-12' (length=7)
  4 => 
    array
      'Client_Firstname' => string 'Sandrah' (length=1)
      'Client_Lastname' => string 'Lewis' (length=7)
      'Client_Email' => string 'san@lewis.com' (length=7)
      'Purchased_ItemId' => int '27' (length=7)
      'ItemName' => string 'FT Card Reader' (length=7)
      'ItemPrice' => string '20.00' (length=7)
      'ItemType' => string 'Hardware' (length=7)
      'date' => string '2013-12-12' (length=7)
  5 => 
     array
      'Client_Firstname' => string 'Jonathan' (length=1)
      'Client_Lastname' => string 'Homad' (length=7)
      'Client_Email' => string 'jon@homad.com' (length=7)
      'Purchased_ItemId' => int '20' (length=7)
      'ItemName' => string 'MiniPad' (length=7)
      'ItemPrice' => string '500.00' (length=7)
      'ItemType' => string 'Hardware' (length=7)
      'date' => string '2013-12-12' (length=7)

其目的是，在输出中，每个客户的名字、姓氏和电子邮件应该只出现一次，然后是所有h/er交易

比如：

array
  0 => 
    array
      'Client_Firstname' => string 'Sandrah' (length=...)
      'Client_Lastname' => string 'Lewis' (length=...)
      'Client_Email' => string 'san@lewis.com' (length=...)
      'Purchased_ItemId' => int '16' (length=...)
      'ItemName' => string 'MiniPad' (length=...)
      'ItemPrice' => string '500.00' (length=...)
      'ItemType' => string 'Hardware' (length=...)
      'date' => string '2013-12-12' (length=...)
      'Purchased_ItemId' => int '18' (length=...)
      'ItemName' => string 'Xpower Speakers' (length=...)
      'ItemPrice' => string '300.00' (length=...)
      'ItemType' => string 'Hardware' (length=...)
      'date' => string '2013-12-12' (length=...)
      'Purchased_ItemId' => int '7' (length=...)
      'ItemName' => string 'Lion Belt' (length=...)
      'ItemPrice' => string '800.00' (length=...)
      'ItemType' => string 'Fashion' (length=...)
      'date' => string '2013-12-12' (length=...)
      'Purchased_ItemId' => int '27' (length=...)
      'ItemName' => string 'FT Card Reader' (length=...)
      'ItemPrice' => string '20.00' (length=...)
      'ItemType' => string 'Hardware' (length=...)
      'date' => string '2013-12-12' (length=...)

  1 => 

     array
      'Client_Firstname' => string 'Derick' (length=...)
      'Client_Lastname' => string 'Smith' (length=...)
      'Client_Email' => string 'der@smith.com' (length=...)
      'Purchased_ItemId' => int '10' (length=...)
      'ItemName' => string 'MegaPad' (length=...)
      'ItemPrice' => string '1500.00' (length=...)
      'ItemType' => string 'Hardware' (length=...)
      'date' => string '2013-12-12' (length=...)

  2 => 

     array
      'Client_Firstname' => string 'Jonathan' (length=...)
      'Client_Lastname' => string 'Homad' (length=...)
      'Client_Email' => string 'jon@homad.com' (length=...)
      'Purchased_ItemId' => int '20' (length=...)
      'ItemName' => string 'MiniPad' (length=...)
      'ItemPrice' => string '500.00' (length=...)
      'ItemType' => string 'Hardware' (length=...)
      'date' => string '2013-12-12' (length=...)

根据我的说法，每个数组中唯一的唯一标识符是电子邮件地址。所以，我试着使用for循环，foreach循环，在其他相关问题的指导下，试图根据电子邮件地址对它们进行分组，但这还没有实现

---

非常感谢您的帮助。

您的查询是什么样子的？您可能想在查询中通过客户电子邮件添加订单。我已将其缩小为一个基本查询，如：

“SELECT*FROM dailyDeals\u tb”

。有了这个，当

var_dump

ed时，看起来是这样的，不知何故有一种感觉，就是使用PHP可以很容易地实现输出结果……但是如何实现呢？