如何在PHP中过滤出有子部分的数组部分？

<?php
// 原始数组
$array = array(
    'apple' => array('color' => 'red', 'taste' => 'sweet'),
    'banana' => array('color' => 'yellow', 'taste' => 'sweet'),
    'orange' => 'orange',
    'grape' => array('color' => 'purple', 'taste' => 'sour')
);

// 过滤出有子部分的数组部分
$result = array_filter($array, function($value) {
    return is_array($value);
});

// 输出结果
print_r($result);
?>

Array
(
    [apple] => Array
        (
            [color] => red
            [taste] => sweet
        )

    [banana] => Array
        (
            [color] => yellow
            [taste] => sweet
        )

    [grape] => Array
        (
            [color] => purple
            [taste] => sour
        )

)