PHP:按值对对象数组进行分组的函数 [英] PHP: Function to group array of objects by value
问题描述
我正在处理一个多维数组.如何按值删除重复项?在以下数组中,[0]、[2] 和 [5] 具有相同的 [ID].是否有一个函数可以根据特定值删除任何重复的数组?在这种情况下,我想删除数组 [2] 和数组 [5],因为它们具有与数组 [0] 相同的 [ID].
I am working with a multi-dimensional array. How can I remove duplicates by value? In the following array, [0], [2] and [5] have the same [ID]. Is there a function that will remove any duplicate arrays based on a particular value? In this case, I would like to remove array [2] and array [5], as they have the same [ID] as array [0].
感谢您提供的任何信息.
Thank you for any information you may have.
Array
(
[0] => stdClass Object
(
[d] => 2010-10-18 03:30:04
[ID] => 9
)
[1] => stdClass Object
(
[d] => 2010-10-18 03:30:20
[ID] => 4
)
[2] => stdClass Object
(
[d] => 2010-11-03 16:46:34
[ID] => 9
)
[3] => stdClass Object
(
[d] => 2010-11-02 03:19:14
[ID] => 1
)
[4] => stdClass Object
(
[d] => 2010-05-12 04:57:34
[ID] => 2
)
[5] => stdClass Object
(
[d] => 2010-05-10 05:24:15
[ID] => 9
)
)
推荐答案
一种方法:($old_array
是你的数组,$new_array
将包含新的,删除了骗子,以该 ID 为键)
One way to do it: ($old_array
is your array, and $new_array
will contain the new one, dupes removed, keyed by that ID)
$new_array = array();
foreach ($old_array as $item)
if (!array_key_exists($item->ID, $new_array))
$new_array[$item->ID] = $item;
(我还没有测试过,但应该可以)
(I haven't tested this, but it should work)
这篇关于PHP:按值对对象数组进行分组的函数的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!