1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
<?php
// +-----------------------------------------------------------------------+
// | PhpWebGallery - a PHP based picture gallery |
// | Copyright (C) 2002-2003 Pierrick LE GALL - pierrick@phpwebgallery.net |
// | Copyright (C) 2003-2005 PhpWebGallery Team - http://phpwebgallery.net |
// +-----------------------------------------------------------------------+
// | branch : BSF (Best So Far)
// | file : $RCSfile$
// | last update : $Date$
// | last modifier : $Author$
// | revision : $Revision$
// +-----------------------------------------------------------------------+
// | This program is free software; you can redistribute it and/or modify |
// | it under the terms of the GNU General Public License as published by |
// | the Free Software Foundation |
// | |
// | This program is distributed in the hope that it will be useful, but |
// | WITHOUT ANY WARRANTY; without even the implied warranty of |
// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
// | General Public License for more details. |
// | |
// | You should have received a copy of the GNU General Public License |
// | along with this program; if not, write to the Free Software |
// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
// | USA. |
// +-----------------------------------------------------------------------+
if (isset($conf['session_save_handler'])
and ($conf['session_save_handler'] == 'db'))
{
session_set_save_handler('pwg_session_open',
'pwg_session_close',
'pwg_session_read',
'pwg_session_write',
'pwg_session_destroy',
'pwg_session_gc'
);
}
ini_set('session.use_cookies', $conf['session_use_cookies']);
ini_set('session.use_only_cookies', $conf['session_use_only_cookies']);
ini_set('session.use_trans_sid', intval($conf['session_use_trans_sid']));
ini_set('session.name', $conf['session_name']);
/**
* returns true; used when the session_start() function is called
*
* @params not use but useful for php engine
*/
function pwg_session_open($path, $name)
{
return true;
}
/**
* returns true; used when the session is closed (unset($_SESSION))
*
*/
function pwg_session_close()
{
pwg_session_gc();
return true;
}
/**
* this function returns
* a string corresponding to the value of the variable save in the session
* or an empty string when the variable doesn't exist
*
* @param string session id
*/
function pwg_session_read($session_id)
{
$query = '
SELECT data
FROM '.SESSIONS_TABLE.'
WHERE id = \''.$session_id.'\'
;';
$result = pwg_query($query);
if ($result)
{
$row = mysql_fetch_assoc($result);
return $row['data'];
}
else
{
return '';
}
}
/**
* returns true; writes set a variable in the active session
*
* @param string session id
* @data string value of date to be saved
*/
function pwg_session_write($session_id, $data)
{
$query = '
SELECT id
FROM '.SESSIONS_TABLE.'
WHERE id = \''.$session_id.'\'
;';
$result = pwg_query($query);
if (mysql_num_rows($result))
{
$query = '
UPDATE '.SESSIONS_TABLE.'
SET expiration = now()
WHERE id = \''.$session_id.'\'
;';
pwg_query($query);
}
else
{
$query = '
INSERT INTO '.SESSIONS_TABLE.'
(id,data,expiration)
VALUES(\''.$session_id.'\',\''.$data.'\',now())
;';
pwg_query($query);
}
return true;
}
/**
* returns true; delete the active session
*
* @param string session id
*/
function pwg_session_destroy($session_id)
{
$query = '
DELETE
FROM '.SESSIONS_TABLE.'
WHERE id = \''.$session_id.'\'
;';
pwg_query($query);
return true;
}
/**
* returns true; delete expired sessions
* called each time a session is closed.
*/
function pwg_session_gc()
{
global $conf;
$query = '
DELETE
FROM '.SESSIONS_TABLE.'
WHERE UNIX_TIMESTAMP(NOW()) - UNIX_TIMESTAMP(expiration) > '
.$conf['session_length'].'
;';
pwg_query($query);
return true;
}
?>
|
