php 用户注册与登陆程序

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();
 }

php 用户登陆代码，入门教程
 function login_xzy()
 {
  $user_=db("user");
  $session_=db("session");
  $login['email']=strip_tags($_POST['email']);
  $login['pass']=empty($_POST['pass'])?"":md5($_POST['pass']);
  if($user=$user_->where("`email`='{$login['email']}' and `pass`='{$login['pass']}'")->find()){
   if($session_->where("`uid`='{$user['uid']}'")->find()){
    $json['status']=1;
    $json['info']='已登陆的会员!';
   }else{
    $user['total']++;
    $user_->where("`uid`='{$user['uid']}'")->update(array('total'=>$user['total'],'lastip'=>ip2long(getip()),'lasttime'=>time() ));
    $session_->where("session_id='".Session_id()."'")->update(array('uid'=>$user['uid']));
    $_SESSION['user']=$user;
    $json['data']=$user;
    $json['status']=0;
   }
  }else{
   $json['status']=1;
   $json['info']='用户名或密码不正确!';
  }
  echo json_encode($json);
 }

php 分页代码，支持前10页与后10页分页
function multLink($currentPage, $totalRecords, $url, $pageSize = 10)

{

 global $func_message;

 if ($totalRecords <= $pageSize) return '';

 $mult = '';

 $totalPages = ceil($totalRecords / $pageSize);

 $mult .= '<div class="pages"><div class="nextprev">';

 if ($currentPage > 1)

 {

  $mult .= '<a href="'.$url.'page='.($currentPage - 1).'">上一页</a>';

 }

 else

 {

  $mult .= '<span class="nextprev">上一页</span>';

 }

 if ($totalPages < 13)

 {

  for ($counter = 1; $counter <= $totalPages; $counter++)

  {

   if ($counter == $currentPage)

   {

    $mult .= '<span class="current">'.$counter.'</span>';

   }

   else

   {

    $mult .= '<a href="'.$url.'page='.$counter.'">'.$counter.'</a>';

   }

  }

 }

 elseif ($totalPages > 11)

 {

  if($currentPage < 7) 

  {

   for ($counter = 1; $counter < 10; $counter++)

   {

    if ($counter == $currentPage)

    {

     $mult .= '<span class="current">'.$counter.'</span>';

    }

    else

    {

     $mult .= '<a href="'.$url.'page='.$counter.'">'.$counter.'</a>';

    }

   }

   $mult .= '<span>&#8230;</span><a href="'.$url.'page='.($totalPages-1).'">'.($totalPages-1).'</a><a href="'.$url.'page='.$totalPages.'">'.$totalPages.'</a>';

  }

  elseif($totalPages - 6 > $currentPage && $currentPage > 6)

  {

   $mult .= '<a href="'.$url.'page=1">1</a><a href="'.$url.'page=2">2</a><span>&#8230;</span>';

   for ($counter = $currentPage - 3; $counter <= $currentPage + 3; $counter++)

   {

    if ($counter == $currentPage)

    {

     $mult .= '<span class="current">'.$counter.'</span>';

    }

    else

    {

     $mult .= '<a href="'.$url.'page='.$counter.'">'.$counter.'</a>';

    }    

   }

   $mult .= '<span>&#8230;</span><a href="'.$url.'page='.($totalPages-1).'">'.($totalPages-1).'</a><a href="'.$url.'page='.$totalPages.'">'.$totalPages.'</a>'; 

  }

  else

  {

   $mult .= '<a href="'.$url.'page=1">1</a><a href="'.$url.'page=2">2</a><span>&#8230;</span>';

   for ($counter = $totalPages - 8; $counter <= $totalPages; $counter++)

   {

    if ($counter == $currentPage)

    {

     $mult .= '<span class="current">'.$counter.'</span>';

    }

    else

    {

     $mult .= '<a href="'.$url.'page='.$counter.'">'.$counter.'</a>';

    }

   }

  }

 }

 if ($currentPage < $counter - 1)

 {

  $mult .= '<a href="'.$url.'page='.($currentPage + 1).'" class="nextprev">下一页</a>';

 }

 else

 {

  $mult .= '<span class="nextprev">下一页</span>';

 }

 $mult .= '</div></div>';

 return $mult;

}

 <br />
.pages {<br />
 float:left;<br />
 margin:3px 0 5px 10px;<br />
 font-size:12px;<br />
}<br />
.pages span.nextprev {<br />
border:1px solid #5CB711;<br />
color:#999999;<br />
}<br />
.pages span.current {<br />
-moz-background-clip:border;<br />
-moz-background-inline-policy:continuous;<br />
-moz-background-origin:padding;<br />
background:#5CB711 none repeat scroll 0 0;<br />
border:1px solid #5CB711;<br />
color:#FFFFFF;<br />
font-weight:bold;<br />
}<br />
.pages a.nextprev {<br />
font-weight:bold;<br />
}<br />
.pages a, .pages a:visited {<br />
border:1px solid #5CB711;<br />
color:#5CB711;<br />
text-decoration:none;<br />
}<br />
.pages a, .pages span {<br />
-moz-background-clip:border;<br />
-moz-background-inline-policy:continuous;<br />
-moz-background-origin:padding;<br />
background:#FFFFFF none repeat scroll 0 0;<br />
display:block;<br />
float:left;<br />
margin-right:0.1em;<br />
padding:0.2em 0.5em;<br />
}<br />

获取用户IP地址与判断真实IP
function getIp() {
    if($_SERVER['HTTP_CLIENT_IP'])
    {
        return $_SERVER['HTTP_CLIENT_IP'];
    } elseif ($_SERVER['HTTP_X_FORWARDED_FOR']) {
        return $_SERVER['HTTP_X_FORWARDED_FOR'];
    } else {
        return $_SERVER['REMOTE_ADDR'];
    }
}

function get_real_ip()
{
        $ip=false;
        if(!empty($_SERVER["HTTP_CLIENT_IP"]))
        {
                $ip = $_SERVER["HTTP_CLIENT_IP"];
        }
        if (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))
        {
                $ips = explode (", ", $_SERVER['HTTP_X_FORWARDED_FOR']);
                if ($ip)
                {
                        array_unshift($ips, $ip); $ip = FALSE;
                }
                for ($i = 0; $i < count($ips); $i++)
                {
                        if (!eregi ("^(10|172.16|192.168).", $ips[$i]))
                        {
                                $ip = $ips[$i];
                                break;
                        }
                }
        }
        return ($ip ? $ip : $_SERVER['REMOTE_ADDR']);
}

php 分页类函数
function getPageBar($count = 0)
{
    $bad_link_color = "#C0C0C0";
   
    $page["url"]           = eregi_replace("&page=[^&]+","",basename($_SERVER[SCRIPT_NAME])."?".$_SERVER[QUERY_STRING]);
   
    $page["result_count"]  = (string) $count;
    $page["this_page"]     = (empty($_GET["page"]))?"1":$_GET["page"];
    $page["this_page"]     = ($page["result_count"] == 0)?"0":$page["this_page"];

    $page["page_size"]     = $GLOBALS["option"]["page_size"];
    $page["page_count"]    = (string) ceil($page["result_count"]/$page["page_size"]);
   
    $page["first_page"]     = ($page["this_page"] > 1)?"<a href="".$page["url"]."&amp;page=1" title="首页"><span style="font-size:12px; font-weight: bold; font-familly: Courier;">&laquo;</span></a>":"";
    $page["rearward_page"]  = ($page["this_page"] < (int) $page["page_count"])?"<a href="".$page["url"]."&amp;page=".$page["page_count"]."" title="末页"><span style="font-size:12px; font-weight: bold; font-familly: Courier;">&raquo;</span></a>":"";
    $page["prev_page"]      = ($page["this_page"] > 1)?"<a href="".$page["url"]."&amp;page=".((int)$page["this_page"] - 1)."" title="上一页"><span style="font-size:12px; font-weight: bold; font-familly: Courier;">&#8249;</span></a>":"";
    $page["next_page"]      = ($page["this_page"] < (int) $page["page_count"])?"<a href="".$page["url"]."&amp;page=".((int)$page["this_page"] + 1)."" title="下一页"><span style="font-size:12px; font-weight: bold; font-familly: Courier;">&#8250;</span></a>":"";
   
    $page['start_page'] = ((int)$page["this_page"]-5<1)?1:(int)$page["this_page"]-5;
    $page['end_page'] = ((int)$page["this_page"]+5 > $page['page_count'])?(int)$page["page_count"]:(int)$page["this_page"]+5;

    for ($i = $page['start_page'];$i <= $page['end_page'];$i++)
    {
        $selected = ($_GET["page"] == $i)?"selected":"";
        $page["page_select"]  .= "<option value="$i" $selected>$i</option>";
        $page["page_list"]  .= ($i == $page["this_page"])?" <font color="red">$i</font> ":"<a href="".$page['url']."&amp;page=$i" title="第 ".$i." 页">[$i]</a>";
    }
   
   
    return $page;
}