PHP手机获取6为不反复验证码

                //存数字数组
                $code = array();

		 while(count($code) < 6){
			 //产生随机数1-9
			 $code[] = rand(1,9);
                         //去除数组中的反复元素
                         $code = array_unique($code);
		 }
		 echo "<pre>";
		 print_r($code);