php - 如何从多维数组中删除重复项和原始数组？

Question

如何删除多维数组中的重复项？ 我尝试了在 stackoverflow 上找到的几个答案，但它们在多数组中都不适合我。我找到的最接近的答案是:

How to delete duplicates in an array? 但这仅适用于一维数组。

例如我有这个:

$array = array(
    [0] = array(
        [color] => red,
        [type] => color,
        [name] => color1
    )
    [1] = array(
        [color] => gray,
        [type] => color,
        [name] => color2
    )
    [2] = array(
        [color] => blue,
        [type] => color,
        [name] => color3
    )
    [3] = array(
        [color] => green,
        [type] => color,
        [name] => color4
    )
    [4] = array(
        [color] => black,
        [type] => color,
        [name] => color5
    )
    [3] = array(
        [color] => gray,
        [type] => color,
        [name] => color2
    )
    [4] = array(
        [color] => blue,
        [type] => color,
        [name] => color3
    )
)

我怎样才能让它变成这样:？

$array = array(
    [0] = array(
        [color] => red,
        [type] => color,
        [name] => color1
    )
    [1] = array(
        [color] => gray,
        [type] => color,
        [name] => color2
    )
    [2] = array(
        [color] => blue,
        [type] => color,
        [name] => color3
    )
    [3] = array(
        [color] => green,
        [type] => color,
        [name] => color4
    )
    [4] = array(
        [color] => black,
        [type] => color,
        [name] => color5
    )
)

Answer 1

嗯，这是一个非常糟糕的答案，但看来您想要唯一的数据，这里有一些非常糟糕的代码来解决这个问题。

$array2 = array();
foreach ($array as $val) 
{
  @$array2[$val['color']]++;
}
foreach ($array as $key=>$val) 
{
  if ($array2[$val['color']] >1)
   unset($array[$key]);
}

@ 的作用是防止 php 抛出错误。或者您可以编写更多代码来预定义 $array2 但这确实有效。