php跨域共享session

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$gb_DBHOSTname = "127.0.0.1"; //主机的名称或是IP地址
02
$gb_DBname = "dbname"; //数据库名称
03
$gb_DBuser = "username"; //数据库用户名称
04
$gb_DBpass = "pwd"; //数据库密码
05
$gb_COOKIE_DOMAIN = '.a.com';
06
$SESS_DBH = "";
07
$SESS_LIFE = get_cfg_var("session.gc_maxlifetime"); //得到session的最大有效期。
08session_id(); //不使用 GET/POST 变量方式
09
ini_set('session.use_trans_sid', 0); //设置垃圾回收最大生存时间
10
ini_set('session.gc_maxlifetime', 13600); //使用 COOKIE 保存 SESSION ID 的方式
11
ini_set('session.use_cookies', 1);
12
ini_set('session.cookie_path', '/'); //多主机共享保存 SESSION ID 的 COOKIE
13
ini_set("session.cookie_domain", $gb_COOKIE_DOMAIN);
14
//将 session.save_handler 设置为 user，而不是默认的 files session_module_name('user');
15
function sess_open($save_path, $session_name) {
16global $gb_DBHOSTname, $gb_DBname, $gb_DBuser, $gb_DBpass, $SESS_DBH;
17if (!$SESS_DBH = mysql_pconnect($gb_DBHOSTname, $gb_DBuser, $gb_DBpass)) {
18die('MySQL Error');
19}
20mysql_query("SET character_set_connection=utf8, character_set_results=utf8, character_set_client=binary", $SESS_DBH);
21if (!mysql_select_db($gb_DBname, $SESS_DBH)) {
22die('MySQL Error');
23}
24return true;
25
}
2627
function sess_close() {
28global $SESS_DBH;
29//$SESS_DBH->Close();
30return true;
31
}
3233
function sess_read($key) {
34global $SESS_DBH, $SESS_LIFE;
35
//      var_dump($SESS_DBH);
36$qry = "select session_data from sessions where session_id = '$key' ";
37$qid = mysql_query($qry, $SESS_DBH);
38
//      var_dump($qid);
39if (list ($value) = mysql_fetch_row($qid)) {
40return $value;
41}
42return false;
43
}
4445
function sess_write($key, $val) {
46global $SESS_DBH, $SESS_LIFE;
47$session_last_access = time();
48$value = $val;
49$qry = "insert into  sessions values('$key',$session_last_access,'$value')";
50$qid = mysql_query($qry, $SESS_DBH);
51if (!$qid) {
52$qry = "update sessions set session_last_access=$session_last_access, session_data='$value' where session_id='$key' ";
53$qid = mysql_query($qry, $SESS_DBH);
54}
55return $qid;
56
}
5758
function sess_destroy($key) {
59global $SESS_DBH;
60$qry = "delete from sessions where session_id = '$key'";
61$qid = mysql_query($qry, $SESS_DBH);
62return $qid;
63
}
6465
function sess_gc($maxlifetime) {
66global $SESS_DBH;
67$old = time() - $maxlifetime;
68$old = mysql_real_escape_string($old);
69$qry = "delete from sessions where session_last_access < " . $old;
70$qid = mysql_query($qry, $SESS_DBH);
71return mysql_affected_rows($SESS_DBH);
72
}
73
session_module_name();
74
session_set_save_handler("sess_open", "sess_close", "sess_read", "sess_write","sess_destroy", "sess_gc");
75
session_start();