$code = isset($_POST['code']) && trim($_POST['code']) ? trim($_POST['code']) : exit(format_ajax_out_json('-1', '请输入验证码'));
if ($_SESSION['code'] != strtolower($code)) {
exit(format_ajax_out_json('-1', "验证码错误！"));
}

session_start();
//注意$output['data']['area']数据为数组，其他为字符串，原生session能够存储数组
$_SESSION['area'] = $output['data']['area'];
$_SESSION['yhid'] = $output['data']['yhid'];

if (isset($_GET['dosubmit'])) {session_start();$code = isset($_POST['code']) && trim($_POST['code']) ? trim($_POST['code']) : exit(format_ajax_out_json('-1', '请输入验证码'));if ($_SESSION['code'] != strtolower($code)) {exit(format_ajax_out_json('-1', "验证码错误！"));
}//-------------------------省略中间代码-------------------------------//添加session

　　//注意$output['data']['area']数据为数组，其他为字符串，原生session能够存储数组

　　$_SESSION['area'] = $output['data']['area'];$_SESSION['yhid'] = $output['data']['yhid'];exit(format_ajax_out_json($output['statusCode'], $output));
}

$session_storage = 'session_'.pc_base::load_config('system','session_storage');
pc_base::load_sys_class($session_storage);

<?php
/***  session mysql 数据库存储类** @copyright            (C) 2005-2010 PHPCMS* @license             http://www.phpcms.cn/license/* @lastmodify         2010-6-8*/
class session_mysql {var $lifetime = 1800;var $db;var $table;
/*** 构造函数* */public function __construct() {$this->db = pc_base::load_model('session_model');$this->lifetime = pc_base::load_config('system','session_ttl');session_set_save_handler(array(&$this,'open'), array(&$this,'close'), array(&$this,'read'), array(&$this,'write'), array(&$this,'destroy'), array(&$this,'gc'));session_start();}
/*** session_set_save_handler  open方法* @param $save_path* @param $session_name* @return true*/public function open($save_path, $session_name) {return true;}
/*** session_set_save_handler  close方法* @return bool*/public function close() {return $this->gc($this->lifetime);}
/*** 读取session_id* session_set_save_handler  read方法* @return string 读取session_id*/public function read($id) {$r = $this->db->get_one(array('sessionid'=>$id), 'data');return $r ? $r['data'] : '';}
/*** 写入session_id 的值* * @param $id session* @param $data 值* @return mixed query 执行结果*/public function write($id, $data) {$uid = isset($_SESSION['userid']) ? $_SESSION['userid'] : 0;$roleid = isset($_SESSION['roleid']) ? $_SESSION['roleid'] : 0;$groupid = isset($_SESSION['groupid']) ? $_SESSION['groupid'] : 0;$m = defined('ROUTE_M') ? ROUTE_M : '';$c = defined('ROUTE_C') ? ROUTE_C : '';$a = defined('ROUTE_A') ? ROUTE_A : '';if(strlen($data) > 255) $data = '';$ip = ip();$sessiondata = array('sessionid'=>$id,'userid'=>$uid,'ip'=>$ip,'lastvisit'=>SYS_TIME,'roleid'=>$roleid,'groupid'=>$groupid,'m'=>$m,'c'=>$c,'a'=>$a,'data'=>$data,);return $this->db->insert($sessiondata, 1, 1);}
/** * 删除指定的session_id* * @param $id session* @return bool*/public function destroy($id) {return $this->db->delete(array('sessionid'=>$id));}
/*** 删除过期的 session* * @param $maxlifetime 存活期时间* @return bool*/public function gc($maxlifetime) {$expiretime = SYS_TIME - $maxlifetime;return $this->db->delete("`lastvisit`<$expiretime");}
}
?>

private function _session_start() {$session_storage = 'session_'.pc_base::load_config('system','session_storage');$this->todo_session = pc_base::load_sys_class($session_storage);
}public function dlsLogin() {$this->_session_start();if (isset($_GET['dosubmit'])) {　　　　$code = isset($_POST['code']) && trim($_POST['code']) ? trim($_POST['code']) : exit(format_ajax_out_json('-1', '请输入验证码'));if ($_SESSION['code'] != strtolower($code)) {exit(format_ajax_out_json('-1', "验证码错误！"));}

　　//-------------------------省略中间代码-------------------------------　　

　　//注意$output['data']['area']数据为数组，其他为字符串，原生session能够存储数组，而session_mysql方法不能存储数组。

    　　$this->todo_session->write('area',$output['data']['area']);$this->todo_session->write('yhid',$output['data']['yhid']);exit(format_ajax_out_json($output['statusCode'], $output));}
}

<?php
class session_files {function __construct() {$path = pc_base::load_config('system', 'session_n') > 0 ? pc_base::load_config('system', 'session_n').';'.pc_base::load_config('system', 'session_savepath')  : pc_base::load_config('system', 'session_savepath');ini_set('session.save_handler', 'files');session_save_path($path);session_start();}
}
?>

<?php
defined('IN_PHPCMS') or exit('No permission resources.'); pc_base::load_sys_class('session_files');
$checkcode = pc_base::load_sys_class('checkcode');
//之后代码省略------------------

//验证码 session_file存储方式
public static function checkcode_file($id = 'checkcode',$code_len = 4, $font_size = 20, $width = 130, $height = 50, $font = '', $font_color = '', $background = '') {return "<img id='$id' οnclick='this.src=this.src+\"&\"+Math.random()' src='".SITE_PROTOCOL.SITE_URL.WEB_PATH."api.php?op=checkcode_file&code_len=$code_len&font_size=$font_size&width=$width&height=$height&font_color=".urlencode($font_color)."&background=".urlencode($background)."'>";
}

{form::checkcode_file('code_img', '4', '14', 120, 26)}