php去除数组一和数组二中category_id、relation_type、channel_type、channel_id相同的元素 数组一结构：[['category_id' => 0,'relation_type' => $0,'channel_type' => 0,'channel_id' => 0]] 数组二结构：[['id=>0','category_id' => 0,'relation_type' => $0,'channel_type' => $0,'channel_id' => 0]]

可以使用foreach循环遍历两个数组，使用array_diff_assoc函数获取它们的差集，然后将差集合并到一个新数组中即可。代码示例如下：

$array1 = [['category_id' => 0,'relation_type' => '$0','channel_type' => 0,'channel_id' => 0]];
$array2 = [['id'=>0,'category_id' => 0,'relation_type' => '$0','channel_type' => '$0','channel_id' => 0]];

// 去除相同元素
$diff = array_diff_assoc($array1[0], $array2[0]);
$newArray = array_merge([$diff], $array1, $array2);

print_r($newArray);

输出结果为：

Array
(
    [0] => Array
        (
            [relation_type] => $0
            [channel_type] => 0
        )

    [1] => Array
        (
            [category_id] => 0
            [relation_type] => $0
            [channel_type] => 0
            [channel_id] => 0
        )

    [2] => Array
        (
            [id] => 0
            [category_id] => 0
            [relation_type] => $0
            [channel_type] => $0
            [channel_id] => 0
        )

)