当使用不同值推送新值时，数组中元素的值不断变化。

Question

在我的项目中，我遇到了一些小麻烦，所以我需要你的帮助。它是纯php的东西。

我从数据库中得到了一些结果($result和$affiliates)。这会是这样的。

$result => array(3) {
  [0]=>
  object(stdClass) {
    ["id"]=> string(1) "1"
    ["amount"]=>string(6) "100.00"
    ["affiliate"]=>NULL
  }
  [1]=>
  object(stdClass) {
    ["id"]=>string(1) "2"
    ["amount"]=>string(6) "200.00"
    ["affiliate"]=>NULL
  }
  [2]=>
  object(stdClass) {
    ["id"]=>string(1) "3"
    ["amount"]=>string(6) "300.00"
    ["affiliate"]=>NULL
  }
}

$affiliates = array(3) {
  [0]=>
  object(stdClass) {
    ["id"]=>string(1) "1"
    ["affiliate"]=>string(11) "affiliate-1"
  }
  [1]=>
  object(stdClass) {
    ["id"]=>string(1) "2"
    ["affiliate"]=>string(11) "affiliate-2"
  }
  [2]=>
  object(stdClass) {
    ["id"]=>string(1) "3"
    ["affiliate"]=>string(11) "affiliate-3"
  }
}

然后我用这个结果做点什么。

这是代码

$new_result = array();
foreach($result as $key => $one)
{
    foreach($affiliates as $affiliate)
    {
        $new_data = $one;
        $new_data->affiliate = $affiliate->affiliate;
        array_push($new_result, $new_data);
    }
}

print_r($new_result);   // length is now 9

//预期结果

array(9) {
  [0]=>object(stdClass) {
    ["id"]=>string(1) "1"
    ["amount"]=>string(6) "100.00"
    ["affiliate"]=>"affiliate-1"
  }
  [1]=>object(stdClass) {
    ["id"]=>string(1) "1"
    ["amount"]=>string(6) "100.00"
    ["affiliate"]=>"affiliate-2"
  }
  [2]=>object(stdClass) {
    ["id"]=>string(1) "1"
    ["amount"]=>string(6) "100.00"
    ["affiliate"]=>"affiliate-3"
  }
  [3]=>object(stdClass) {
    ["id"]=>string(1) "2"
    ["amount"]=>string(6) "200.00"
    ["affiliate"]=>"affiliate-1"
  }
  [4]=>
  object(stdClass) {
    ["id"]=>string(1) "2"
    ["amount"]=>string(6) "200.00"
    ["affiliate"]=>"affiliate-2"
  }
  [5]=>
  object(stdClass) {
    ["id"]=>string(1) "2"
    ["amount"]=>string(6) "200.00"
    ["affiliate"]=>"affiliate-3"
  }
 [6]=>
  object(stdClass) {
    ["id"]=>string(1) "3"
    ["amount"]=>string(6) "300.00"
    ["affiliate"]=>"affiliate-1"
  }
  [7]=>
  object(stdClass) {
    ["id"]=>string(1) "3"
    ["amount"]=>string(6) "300.00"
    ["affiliate"]=>"affiliate-2"
  }
  [8]=>
  object(stdClass) {
    ["id"]=>string(1) "3"
    ["amount"]=>string(6) "300.00"
    ["affiliate"]=>"affiliate-3"
  }
}   

//但是拿着这个

array(9) {
  [0]=>
  object(stdClass) {
    ["id"]=>string(1) "1"
    ["amount"]=>string(6) "100.00"
    ["affiliate"]=>"affiliate-3"
  }
  [1]=>
  object(stdClass) {
    ["id"]=>string(1) "1"
    ["amount"]=>string(6) "100.00"
    ["affiliate"]=>"affiliate-3"
  }
  [2]=>
  object(stdClass) {
    ["id"]=>string(1) "1"
    ["amount"]=>string(6) "100.00"
    ["affiliate"]=>"affiliate-3"
  }
  [3]=>
  object(stdClass) {
    ["id"]=>string(1) "2"
    ["amount"]=>string(6) "200.00"
    ["affiliate"]=>"affiliate-3"
  }
  [4]=>
  object(stdClass) {
    ["id"]=>string(1) "2"
    ["amount"]=>string(6) "200.00"
    ["affiliate"]=>"affiliate-3"
  }
  [5]=>
  object(stdClass) {
    ["id"]=>string(1) "2"
    ["amount"]=>string(6) "200.00"
    ["affiliate"]=>"affiliate-3"
  }
 [6]=>
  object(stdClass) {
    ["id"]=>string(1) "3"
    ["amount"]=>string(6) "300.00"
    ["affiliate"]=>"affiliate-3"
  }
  [7]=>
  object(stdClass) {
    ["id"]=>string(1) "3"
    ["amount"]=>string(6) "300.00"
    ["affiliate"]=>"affiliate-3"
  }
  [8]=>
  object(stdClass) {
    ["id"]=>string(1) "3"
    ["amount"]=>string(6) "300.00"
    ["affiliate"]=>"affiliate-3"
  }
}

“new_result”数组中所有元素的“附属”属性将使用“附属”数组的最后一个元素进行更新。

我试图打印“new_result”数组的第一个元素，用于每次循环。

foreach($result as $key => $one)
{
    foreach($affiliates as $affiliate)
    {
        $new_data = $one;
        $new_data->affiliate = $affiliate->affiliate;
        array_push($new_result, $new_data);
        print_r($new_result[0]->affiliate);
    }
}

//预期结果，如你所知

"affiliate-1"
"affiliate-1"
"affiliate-1"
"affiliate-1"
"affiliate-1"
"affiliate-1" ... 9 times

// but suprisingly get this 
"affiliate-1"
"affiliate-2"
"affiliate-3"
"affiliate-3"
"affiliate-3"
"affiliate-3"
"affiliate-3"  
...

我想这与一些类似于C++的对象值的引用有关。所以我试着做了几种选择，但结果都是一样的。

我以前从未经历过这个问题。如果有人知道这是怎么回事，请教我，

Answer 1

这两个循环正在产生3x3的新现象。

你需要确保你得到的是正确的附属机构，而不是所有的附属机构。

$new_result = array();
foreach($result as $key => $one)
{
    foreach($affiliates as $affiliate)
    {
        // make sure yuo are getting the relevant affilicate and not all of them
        if ( $one->id == $affiliate->id) {
            $new_data = $one;
            $new_data->affiliate = $affiliate->affiliate;
            $new_result[] = $new_data;
        }
    }
}

结果

Array
(
    [0] => stdClass Object
        (   [id] => 1
            [amount] => 100.00
            [affiliate] => affiliate-1
        )
    [1] => stdClass Object
        (   [id] => 2
            [amount] => 200.00
            [affiliate] => affiliate-2
        )
    [2] => stdClass Object
        (    [id] => 3
            [amount] => 300.00
            [affiliate] => affiliate-3
        )
)