怎么改呢
------解决方案--------------------
php codefunction sc() { $ar = array(); for ($i = 0; $i ------解决方案--------------------
php code $arr = array('0','1','2','3','4','5','6','7','8','9');//定义数组 shuffle($arr);//打乱元素顺序 $rand = array_slice($arr,0,4);//取前四个元素 $result=implode('',$rand);//转成字符串 echo $result;