//设置utf8

header("Content-Type: text/html; charset=UTF-8");

// 指定允许其他域名访问
        header('Access-Control-Allow-Origin:*');
// 响应类型
        header('Access-Control-Allow-Methods:POST');
// 响应头设置
        header('Access-Control-Allow-Headers:x-requested-with,content-type');