从PHP数组中通过id删除重复项的快速方法

问题描述：

I have an array and would like to remove duplicates. I'm using php. How to remove duplicate rows (by id).
My array looks like:

 Array
    (
        [0] => Array
            (
                [id] => 415
            ) 
        [1] => Array
            (
                [id] => 425
            )
        [2] => Array
            (
                [id] => 425
            )
        [3] => Array
            (
                [id] => 426
            )
     )

我有一个数组，想要删除重复项。我正在使用php。如何删除重复的行（通过id）。
我的数组如下所示： p>

  Array 
（
 [0] =＆gt; Array 
（\  n [id] =＆gt; 415 
）
 [1] =＆gt;数组
（
 [id] =＆gt; 425 
）
 [2] =＆gt;数组
（
 [  id] =＆gt; 425 
）
 [3] =＆gt;数组
（
 [id] =＆gt; 426 
）
）
  code>  pre> 
   DIV>

答

Assuming that id is the only element of the array, you can walk through the array using serialize and array_unique, as array_unique by itself doesn't work with multidimensional arrays.

$foo = array_map('unserialize', array_unique(array_map("serialize", $foo)));

If you have other elements, @Ghost's answer is probably better

答

This will also flatten the array to a 1-dimensional array

$data = array(
    array(
        'id' => 415,
    ),
    array(
        'id' => 425,
    ),
    array(
        'id' => 425,
    ),
    array(
        'id' => 426,
    ),
);


$data = array_unique(
    array_map('end', $data)
);
var_dump($data);

gives

Array
(
    [0] => 415
    [1] => 425
    [3] => 426
)

从PHP数组中通过id删除重复项的快速方法

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