php - 如果值与 PHP 中数组中的其他值相关，如何从数组中删除数组？

Question

我有一个数组，想从数组中删除相关值。

例。

In array [0] have 1/2/3 and [1] have 1/2/3/4 then [0] is a related to [1] so remove [0] which have 1/2/3 from the array.

另一个例子是

例。

[2] have 1/2/5, [3] have 1/2/5/6 and [4] have 1/2/5/6/7 then [2] and [3] depends on [4] so remove [2] and [3] both array form array.

有关详细信息，请查看以下示例。

Array
(
    [0] => Array
        (
            [id] => 1/2/3
        )

    [1] => Array
        (
            [id] => 1/2/3/4
        )

    [2] => Array
        (
            [id] => 1/2/5
        )

    [3] => Array
        (
            [id] => 1/2/5/6
        )

    [4] => Array
        (
            [id] => 1/2/5/6/7
        )
)

想要输出:

Array
(

    [0] => Array
         (
            [id] => 1/2/3/4
        )


    [1] => Array
        (
            [id] => 1/2/5/6/7
        )
)

我不知道我该怎么做。可能吗？

Answer 1

假设数组是有序的，您可以array_reverse 数组。使用 array_reduce 遍历数组，使用 strpos 检查字符串中子字符串第一次出现的位置。

$arr = //your array
$result = array_reduce( array_reverse( $arr ), function( $c, $v ){
    if ( count( $c ) === 0 ) $c[] = $v;
    else if ( count( $c ) && strpos( $c[0]['id'] , $v['id'] ) === false ) array_unshift( $c, $v );      
    return $c;
}, array());

echo "<pre>";
print_r( $result );
echo "</pre>";

这将导致:

Array
(
    [0] => Array
        (
            [id] => 1/2/3/4
        )

    [1] => Array
        (
            [id] => 1/2/5/6/7
        )

)