public function about() {
$about = session('userinfo');
$uid = $about["id"];
if(!$uid){
$this->error('请先进行登录');
exit ();
}

$aboutModel = D('Profile');
$row = $aboutModel->where(array('id'=>$uid))->find();

$nv = $row[sex];
$n = '男';
$v = '女';

if($nv=='女'){

$yow = $aboutModel->where(array('sex'=>$n))->order('rand()')->select();
$ui = $yow[0];
$u = $ui['id'];
$data['uid'] = $u;
$aboutModel->where(array('id'=>$uid))->data($data)->save();比如这个方法一天就只执行一次