如果值存在于所有数组中，如何在PHP中从多维数组返回重复值 - How to return duplicate values from multidimentional array in PHP if the value exists in all arrays.

How to return duplicate values from multidimentional array in PHP if the value exists in all arrays.

我已经想了好几天了，但没有得到好的结果。我在PHP中有一个多维度的对象数组（print_r）：

Array
(
[3] => Array
    (
        [0] => stdClass Object
            (
                [productoId] => 16
            )
        [1] => stdClass Object
            (
                [productoId] => 21
            )
        [2] => stdClass Object
            (
                [productoId] => 22
            )
    )
[7] => Array
    (
        [0] => stdClass Object
            (
                [productoId] => 16
            )
        [1] => stdClass Object
            (
                [productoId] => 21
            )
        [2] => stdClass Object
            (
                [productoId] => 22
            )
    )
[6] => Array
    (
        [0] => stdClass Object
            (
                [productoId] => 16
            )
        [1] => stdClass Object
            (
                [productoId] => 17
            )
    )
)

我想得到所有数组中存在的重复值，例如：

stdClass Object
        (
            [productoId] => 16
        )

但不是：

stdClass Object
        (
            [productoId] => 21
        )

你知道我怎样才能做到这一点吗？

如下：

$array = array(
            3 => array((object) array('productoId' => '16'), (object) array('productoId' => '21'), (object) array('productoId' => '22')),
            7 => array((object) array('productoId' => '16'), (object) array('productoId' => '21'), (object) array('productoId' => '22')),
            6 => array((object) array('productoId' => '16'), (object) array('productoId' => '17'))
        );
$arrays = count($array);
$match = array();
$duplicates = array();
foreach($array as $one){
    foreach($one as $single){
        $var = (array)$single;
        if(!isset($match[$var['productoId']])) { $match[$var['productoId']] = 0; }
        $match[$var['productoId']]++;
        if($match[$var['productoId']] == $arrays){
            $duplicates[] = (int)$var['productoId'];
        }
    }
}
print_r($duplicates);