将数组合并到没有键的数组？ [英] merge array to array without key?

问题描述

我试图让Facebook上传照片与随机标签的朋友。
程序运行正常但我在数组上堆栈

  $ args = array（
'消息'=>'测试标签文本'，
access_token=> $ access_token，
image=> $ files，
'tags'=& 
）; 
  

$ id是数组朋友列表中的格式

  $ friends = $ facebook-> api（'/ me / friends'）; 
 $ frand = array_rand（$ friends ['data']，20）; 
 
 foreach（$ frand as $ fid）{
 $ id [$ fid] ['tag_uid'] = $ friends ['data'] [$ fid] ['id']; 
 $ id [$ fid] ['x'] = 0; 
 $ id [$ fid] ['y'] = 0; 
} 
  

解决方案

更新2：

请阅读关于数组： PHP手动数组。数组中的每个元素都有一个键，即使你没有指定它。您不能在没有键的数组中有元素。

定义数组的区别在于您不必指定键和打印数组，它为您提供了数组的文本表示。

更新：似乎必须是

  $ args ['tags'] = $ id; 
  

$ id 已经是一个数组。如果将其传递给数组，它将创建一个新数组，其中 $ id 作为第一个元素。 >

---

旧答案：

你是已经在谈论合并。你看过 array_merge ^[docs] ？

  $ args ['tags'] = array_merge（$ args ['tags']，$ id）; 
  

---

当然， $ args ['tags'] = array（$ id）; 不起作用

1. 覆盖已经存在的 $ args ['tags'] 的值。


2. 正如您已经注意到的，它将一个已经是数组的 $ id 添加到数组中。如果 $ args ['tags'] 没有值，你可以做 $ args ['tags'] = $ id; code>。






im trying to make facebook upload photo with random tag friend. the program was run correctly but i got stack on the array

$args = array(  
    'message' => 'Test Tags Text',  
    "access_token" => $access_token,  
    "image" => $files,
    'tags'    => $id,
); 

the $id is array friend list here the format

$friends = $facebook->api('/me/friends'); 
$frand = array_rand( $friends['data'], 20 );

foreach($frand as $fid){ 
    $id[$fid]['tag_uid'] =  $friends['data'][$fid]['id'];
$id[$fid]['x']  = 0;
$id[$fid]['y']  = 0;
}

解决方案

Update 2:

Please read about arrays: PHP manual arrays. Every element in an array has a key even if you don't specify it. You cannot have an element in an array without key.

There is a difference between defining an array, where you don't have to specify keys, and printing the array, which gives you a textual representation of the array.

Update: So it seems it has to be

$args['tags'] = $id;

$id is already an array. If you pass it to array, it will create a new array with the $id as first element.

---

Old answer:

You are already talking about merge. Have you had a look at array_merge^[docs]?

$args['tags'] = array_merge($args['tags'], $id);

---

Of course, $args['tags'] = array( $id ); does not work. It

1. Overwrites the already existing value of $args['tags'].
2. As you already noticed, it adds $id which is already an array, to an array. If $args['tags'] does not have a value, you could just do $args['tags'] = $id;.

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