MongoHelper.php

<?php

namespace yii\mongodb;

class MongoHelper
{
    /**
     * Converts all instances of stdClass to array recursively
     * @param \stdClass $row
     * @return array
     */
    public static function resultToArray($row)
    {
        //TODO: Change this by using \MongoDB\Driver\Cursor::setTypeMap
        if ($row instanceof \stdClass) {
            $row = (array)$row;
        }

        if (is_array($row)) {
            foreach($row as $key => $value) {
                $row[$key] = self::resultToArray($value);
            }
        }

        return $row;
    }

    /**
     * @param \MongoDB\Driver\Cursor $cursor
     * @return array first value of cursor.
     */
    public static function cursorFirst($cursor)
    {
        foreach($cursor as $row) {
            return self::resultToArray($row);
        }
        return null;
    }
}