Php 如何从具有不同键的多维数组中删除重复值

我正在尝试从多维数组中删除重复值。我试过很多例子，但我没有得到我想要的

我的数组在这里

Array
(
  [0] => Array
     (
        [0] => stdClass Object
            (
                [CouponCode] => REZEZ150
                [PurchaseAmt] => 1000.00
                [DiscountAmt] => 150.00
            )
        [1] => stdClass Object
            (
                [CouponCode] => REZEZ500
                [PurchaseAmt] => 2500.00
                [DiscountAmt] => 500.00
            )
    )
[1] => Array
    (
        [0] => stdClass Object
            (
                [CouponCode] => REZEZ150
                [PurchaseAmt] => 1000.00
                [DiscountAmt] => 150.00
            )
        [1] => stdClass Object
            (
                [CouponCode] => REZEZ350
                [PurchaseAmt] => 2000.00
                [DiscountAmt] => 350.00
            )
        [2] => stdClass Object
            (
                [CouponCode] => REZEZ500
                [PurchaseAmt] => 2500.00
                [DiscountAmt] => 500.00
            )
      )
     )

我希望在删除重复值后使用数组，如

 Array
    (
      [0] => Array
        (
            [0] => stdClass Object
                (
                    [CouponCode] => REZEZ150
                    [PurchaseAmt] => 1000.00
                    [DiscountAmt] => 150.00
                )
            [1] => stdClass Object
                (
                    [CouponCode] => REZEZ350
                    [PurchaseAmt] => 2000.00
                    [DiscountAmt] => 350.00
                )
            [2] => stdClass Object
                (
                    [CouponCode] => REZEZ500
                    [PurchaseAmt] => 2500.00
                    [DiscountAmt] => 500.00
                )
          )
         )

类似的问题和答案，但不能解决我的问题：

[How to remove duplicates from multidimensional array in php \[duplicate\]][1] 

试试这个

$arrResult = $arrResult1 = array();

foreach($arrData as $key1 => $arrData1){
    foreach($arrData1 as $key2 => $arrData2){
                $arrResult[] = $arrData2;
    }
}

$arrResult1[] = array_map("unserialize", array_unique(array_map("serialize", $arrResult)));

echo "<pre>"; print_r($arrResult1);

$arrResult=$arrrresult1=array（）；
foreach（$arrData作为$key1=>$arrData1）{
foreach（$arrData1作为$key2=>$arrData2）{
$arrResult[]=$arrData2；
}
}
$arrResult1[]=数组映射（“非序列化”，数组唯一（数组映射（“序列化”），$arrResult））；
回声“；打印费用（$arresult1）；

谢谢 我已经解决了 首先我把它改成了一维数组

$j=array();     

foreach ($a as $key => $value) {
    $j[$value->CouponCode]['CouponCode']=$value->CouponCode;
    $j[$value->CouponCode]['PurchaseAmt']=$value->PurchaseAmt;
    $j[$value->CouponCode]['DiscountAmt']=$value->DiscountAmt;
}

p($j);

之后，运行foreach循环代表键和值，如

Array
(
    [REZEZ150] => Array
        (
            [CouponCode] => REZEZ150
            [PurchaseAmt] => 1000.00
            [DiscountAmt] => 150.00
        )

    [REZEZ500] => Array
        (
            [CouponCode] => REZEZ500
            [PurchaseAmt] => 2500.00
            [DiscountAmt] => 500.00
        )

    [REZEZ350] => Array
        (
            [CouponCode] => REZEZ350
            [PurchaseAmt] => 2000.00
            [DiscountAmt] => 350.00
        )

)

现在我得到了结果

$couponCodes = array();

$a = array_filter($a, function (stdClass $purchase) use (&$couponCodes) {
    if (in_array($purchase->CouponCode, $couponCodes)) {
        return false;
    }

    $couponCodes[] = $purchase->CouponCode;

    return true;
});

请告诉我这是好方法还是坏方法？

使用

array\u filter（）

：

接着

---

有关参考，请参阅

我认为在提取数据时有一个问题，你能再解释一下你是如何从数据库中提取数据的吗？实际上，我在foreach循环中发送请求，然后在数组中一个接一个地得到响应，比如$response[$key]，然后打印出循环；感谢您的回复，但它的工作方式与我所希望的不同当您在循环创建一维数组时，只需检查元素是否已经存在。这将避免第二个循环，并获得所需的未复制数组。

$couponCodes = array();

$a = array_filter($a, function (stdClass $purchase) use (&$couponCodes) {
    if (in_array($purchase->CouponCode, $couponCodes)) {
        return false;
    }

    $couponCodes[] = $purchase->CouponCode;

    return true;
});