如何将DirectoryIterator中的数组转换为有效的Json格式

Question

For testing purpose, i am Looking to convert an array into a valid Json format. To do this, I get a list of files from a directory. This gives me as result:

{"data":["file1.txt","file2.txt","file3.txt"]}

Here's my code:

public function getDirectories() {
    $dir = $this->getConfig(); // My Directory
    $array = array();
    $handle = opendir($dir);
    while (FALSE !== ($entry = readdir($handle))) {
        if ($entry == '.' || $entry == '..')
            continue;
        $array[] = $entry;
    }
    return $array;
}

And My class for processing:

class ArrayValue implements JsonSerializable {

    public function __construct(array $array) {
        $this->array = $array;
    }

    public function jsonSerialize() {
        return array('data' => $this->array);
    }
}

I think I have a here a json result format certainly, but this appears to be invalid, since I have an array in the json. So How do I proceed to get the following format like this?

{"data":{"file1.txt","file2.txt","file3.txt"}}

Answer 1

You first JSON string is fine, since keys of files are numeric, so it's array, and not object.
To simplify everything, you can collect everything to array

$data = [
   [
       'data' => [
           'file1.txt',
       ],
       [
           'file2.txt',
       ],

       [
           'file3.txt',
       ],
   ]
];

And than just convert array to JSON:

$json = json_encode($data);  // will return valid json
$array = json_decode($json); // will return parsed json