php用户注册与登陆程序-PHP源码

php 用户注册与登陆程序
function islogin_xzy()
{
if(!isset($_SESSION['user'])){
$json['status']=1;
}else{
$ssess_=db("session as s");
$where="s.session_id='".Session_id()."' and u.uid is not null";
if($user=$ssess_->join("`user` as u on u.uid=s.uid")->field("u.*,s.session_id,s.uid")->where($where)->find()){
$json['status']=0;
$json['data']=$user;
}else{
$json['status']=1;
}
}
echo json_encode($json);
}

function reg_xzy()
{
$user_=db("user");
$reg['email']=strip_tags($_POST['email']);
$reg['pass']=empty($_POST['pass'])?"":md5($_POST['pass']);
$reg['sex']=$_POST['sex']=='男' || $_POST['sex']=='女'?$_POST['sex']:'';
$reg['nickname']=strip_tags($_POST['nickname']);
$reg['regip']=ip2long(getip());
$reg['regtime']=time();
$i=0;
foreach($reg as $v){
if(!empty($v)) $i++;
}
if($i!=6){
$json['status']=1;
$json['info']='注册项不全!';
}elseif($user_->where("`email`='{$reg['email']}'")->find()){
$json['status']=1;
$json['info']='已注册的email地址!';
}elseif($uid=$user_->insert($reg)){
$session_=db("session");
$session_->where("session_id='".Session_id()."'")->update(array('uid'=>$uid));
$sessionas_=db("session as s");
$where="s.session_id='".Session_id()."' and s.uid is not null";
if($user=$sessionas_->join("user as u on u.uid=s.uid")->field("u.*,s.session_id,s.uid")->where($where)->find()){
$_SESSION['user']=$user;
$json['data']=$user;
$json['status']=0;
}else{
$json['status']=1;
$json['info']='自动登陆出错，请人工登陆!';
}
}else{
$json['status']=1;
$json['info']='注册失败!';
}
echo json_encode($json);
}

function logout_xzy()
{
$session_=db("session");
$session_->where("session_id='".Session_id()."'")->update(array("uid"=>null));
session_destroy();
}