你好，我是 晚枫

class WanFeng {
    public function getExpertise() {
        return [
            'Languages' => ['PHP', 'Python', 'JavaScript'],
            'Frameworks' => ['Laravel', 'Django', 'React'],
            'Databases' => ['MySQL', 'PostgreSQL', 'MongoDB'],
            'Tools' => ['Git', 'Docker', 'AWS']
        ];
    }
}

$me = new WanFeng();
print_r($me->getExpertise());