深度多维数组上的array_filter

array array_filter ( array $array [, callable $callback [, int $flag = 0 ]] )

$array = [
    'name' => 'John',
    'age' => 25,
    'skills' => [
        'programming' => true,
        'design' => false,
        'communication' => true
    ],
    'projects' => [
        [
            'name' => 'Project A',
            'status' => 'completed'
        ],
        [
            'name' => 'Project B',
            'status' => 'in progress'
        ]
    ]
];

// 过滤掉值为false的元素
$result = array_filter($array);

// 输出过滤结果
print_r($result);

Array
(
    [name] => John
    [age] => 25
    [skills] => Array
        (
            [programming] => 1
            [communication] => 1
        )

    [projects] => Array
        (
            [0] => Array
                (
                    [name] => Project A
                    [status] => completed
                )

            [1] => Array
                (
                    [name] => Project B
                    [status] => in progress
                )

        )

)