[2] | 1 | <?php |
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| 2 | /* |
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[34] | 3 | V4.94 23 Jan 2007 (c) 2000-2007 John Lim (jlim#natsoft.com.my). All rights reserved. |
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[2] | 4 | Released under both BSD license and Lesser GPL library license. |
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| 5 | Whenever there is any discrepancy between the two licenses, |
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| 6 | the BSD license will take precedence. |
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| 7 | Made table name configurable - by David Johnson djohnson@inpro.net |
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| 8 | Encryption by Ari Kuorikoski <ari.kuorikoski@finebyte.com> |
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| 9 | |
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| 10 | Set tabs to 4 for best viewing. |
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| 11 | |
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| 12 | Latest version of ADODB is available at http://php.weblogs.com/adodb |
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| 13 | ====================================================================== |
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| 14 | |
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| 15 | This file provides PHP4 session management using the ADODB database |
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| 16 | wrapper library. |
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| 17 | |
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| 18 | Example |
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| 19 | ======= |
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| 20 | |
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| 21 | include('adodb.inc.php'); |
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| 22 | #---------------------------------# |
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| 23 | include('adodb-cryptsession.php'); |
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| 24 | #---------------------------------# |
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| 25 | session_start(); |
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[34] | 26 | $_SESSION['AVAR'] += 1; |
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| 27 | print " |
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| 28 | -- \$_SESSION['AVAR']={$_SESSION['AVAR']}</p>"; |
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[2] | 29 | |
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| 30 | |
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| 31 | Installation |
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| 32 | ============ |
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| 33 | 1. Create a new database in MySQL or Access "sessions" like |
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| 34 | so: |
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| 35 | |
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| 36 | create table sessions ( |
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| 37 | SESSKEY char(32) not null, |
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| 38 | EXPIRY int(11) unsigned not null, |
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| 39 | EXPIREREF varchar(64), |
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| 40 | DATA CLOB, |
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| 41 | primary key (sesskey) |
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| 42 | ); |
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| 43 | |
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| 44 | 2. Then define the following parameters. You can either modify |
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| 45 | this file, or define them before this file is included: |
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| 46 | |
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| 47 | $ADODB_SESSION_DRIVER='database driver, eg. mysql or ibase'; |
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| 48 | $ADODB_SESSION_CONNECT='server to connect to'; |
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| 49 | $ADODB_SESSION_USER ='user'; |
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| 50 | $ADODB_SESSION_PWD ='password'; |
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| 51 | $ADODB_SESSION_DB ='database'; |
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| 52 | $ADODB_SESSION_TBL = 'sessions' |
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| 53 | |
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| 54 | 3. Recommended is PHP 4.0.2 or later. There are documented |
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| 55 | session bugs in earlier versions of PHP. |
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| 56 | |
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| 57 | */ |
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| 58 | |
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| 59 | |
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| 60 | include_once('crypt.inc.php'); |
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| 61 | |
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| 62 | if (!defined('_ADODB_LAYER')) { |
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| 63 | include (dirname(__FILE__).'/adodb.inc.php'); |
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| 64 | } |
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| 65 | |
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| 66 | /* if database time and system time is difference is greater than this, then give warning */ |
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| 67 | define('ADODB_SESSION_SYNCH_SECS',60); |
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| 68 | |
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| 69 | if (!defined('ADODB_SESSION')) { |
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| 70 | |
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| 71 | define('ADODB_SESSION',1); |
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| 72 | |
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| 73 | GLOBAL $ADODB_SESSION_CONNECT, |
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| 74 | $ADODB_SESSION_DRIVER, |
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| 75 | $ADODB_SESSION_USER, |
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| 76 | $ADODB_SESSION_PWD, |
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| 77 | $ADODB_SESSION_DB, |
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| 78 | $ADODB_SESS_CONN, |
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| 79 | $ADODB_SESS_LIFE, |
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| 80 | $ADODB_SESS_DEBUG, |
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| 81 | $ADODB_SESS_INSERT, |
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| 82 | $ADODB_SESSION_EXPIRE_NOTIFY, |
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| 83 | $ADODB_SESSION_TBL; |
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| 84 | |
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| 85 | //$ADODB_SESS_DEBUG = true; |
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| 86 | |
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| 87 | /* SET THE FOLLOWING PARAMETERS */ |
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| 88 | if (empty($ADODB_SESSION_DRIVER)) { |
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| 89 | $ADODB_SESSION_DRIVER='mysql'; |
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| 90 | $ADODB_SESSION_CONNECT='localhost'; |
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| 91 | $ADODB_SESSION_USER ='root'; |
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| 92 | $ADODB_SESSION_PWD =''; |
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| 93 | $ADODB_SESSION_DB ='xphplens_2'; |
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| 94 | } |
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| 95 | |
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| 96 | if (empty($ADODB_SESSION_TBL)){ |
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| 97 | $ADODB_SESSION_TBL = 'sessions'; |
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| 98 | } |
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| 99 | |
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| 100 | if (empty($ADODB_SESSION_EXPIRE_NOTIFY)) { |
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| 101 | $ADODB_SESSION_EXPIRE_NOTIFY = false; |
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| 102 | } |
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| 103 | |
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| 104 | function ADODB_Session_Key() |
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| 105 | { |
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| 106 | $ADODB_CRYPT_KEY = 'CRYPTED ADODB SESSIONS ROCK!'; |
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| 107 | |
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| 108 | /* USE THIS FUNCTION TO CREATE THE ENCRYPTION KEY FOR CRYPTED SESSIONS */ |
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| 109 | /* Crypt the used key, $ADODB_CRYPT_KEY as key and session_ID as SALT */ |
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| 110 | return crypt($ADODB_CRYPT_KEY, session_ID()); |
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| 111 | } |
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| 112 | |
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| 113 | $ADODB_SESS_LIFE = ini_get('session.gc_maxlifetime'); |
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| 114 | if ($ADODB_SESS_LIFE <= 1) { |
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| 115 | // bug in PHP 4.0.3 pl 1 -- how about other versions? |
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| 116 | //print "<h3>Session Error: PHP.INI setting <i>session.gc_maxlifetime</i>not set: $ADODB_SESS_LIFE</h3>"; |
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| 117 | $ADODB_SESS_LIFE=1440; |
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| 118 | } |
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| 119 | |
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| 120 | function adodb_sess_open($save_path, $session_name) |
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| 121 | { |
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| 122 | GLOBAL $ADODB_SESSION_CONNECT, |
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| 123 | $ADODB_SESSION_DRIVER, |
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| 124 | $ADODB_SESSION_USER, |
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| 125 | $ADODB_SESSION_PWD, |
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| 126 | $ADODB_SESSION_DB, |
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| 127 | $ADODB_SESS_CONN, |
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| 128 | $ADODB_SESS_DEBUG; |
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| 129 | |
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| 130 | $ADODB_SESS_INSERT = false; |
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| 131 | |
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| 132 | if (isset($ADODB_SESS_CONN)) return true; |
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| 133 | |
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| 134 | $ADODB_SESS_CONN = ADONewConnection($ADODB_SESSION_DRIVER); |
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| 135 | if (!empty($ADODB_SESS_DEBUG)) { |
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| 136 | $ADODB_SESS_CONN->debug = true; |
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| 137 | print" conn=$ADODB_SESSION_CONNECT user=$ADODB_SESSION_USER pwd=$ADODB_SESSION_PWD db=$ADODB_SESSION_DB "; |
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| 138 | } |
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| 139 | return $ADODB_SESS_CONN->PConnect($ADODB_SESSION_CONNECT, |
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| 140 | $ADODB_SESSION_USER,$ADODB_SESSION_PWD,$ADODB_SESSION_DB); |
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| 141 | |
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| 142 | } |
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| 143 | |
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| 144 | function adodb_sess_close() |
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| 145 | { |
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| 146 | global $ADODB_SESS_CONN; |
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| 147 | |
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| 148 | if ($ADODB_SESS_CONN) $ADODB_SESS_CONN->Close(); |
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| 149 | return true; |
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| 150 | } |
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| 151 | |
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| 152 | function adodb_sess_read($key) |
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| 153 | { |
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| 154 | $Crypt = new MD5Crypt; |
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| 155 | global $ADODB_SESS_CONN,$ADODB_SESS_INSERT,$ADODB_SESSION_TBL; |
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| 156 | $rs = $ADODB_SESS_CONN->Execute("SELECT data FROM $ADODB_SESSION_TBL WHERE sesskey = '$key' AND expiry >= " . time()); |
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| 157 | if ($rs) { |
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| 158 | if ($rs->EOF) { |
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| 159 | $ADODB_SESS_INSERT = true; |
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| 160 | $v = ''; |
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| 161 | } else { |
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| 162 | // Decrypt session data |
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| 163 | $v = rawurldecode($Crypt->Decrypt(reset($rs->fields), ADODB_Session_Key())); |
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| 164 | } |
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| 165 | $rs->Close(); |
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| 166 | return $v; |
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| 167 | } |
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| 168 | else $ADODB_SESS_INSERT = true; |
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| 169 | |
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| 170 | return ''; |
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| 171 | } |
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| 172 | |
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| 173 | function adodb_sess_write($key, $val) |
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| 174 | { |
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| 175 | $Crypt = new MD5Crypt; |
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| 176 | global $ADODB_SESS_INSERT,$ADODB_SESS_CONN, $ADODB_SESS_LIFE, $ADODB_SESSION_TBL,$ADODB_SESSION_EXPIRE_NOTIFY; |
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| 177 | |
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| 178 | $expiry = time() + $ADODB_SESS_LIFE; |
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| 179 | |
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| 180 | // encrypt session data.. |
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| 181 | $val = $Crypt->Encrypt(rawurlencode($val), ADODB_Session_Key()); |
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| 182 | |
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| 183 | $arr = array('sesskey' => $key, 'expiry' => $expiry, 'data' => $val); |
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| 184 | if ($ADODB_SESSION_EXPIRE_NOTIFY) { |
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| 185 | $var = reset($ADODB_SESSION_EXPIRE_NOTIFY); |
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| 186 | global $$var; |
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| 187 | $arr['expireref'] = $$var; |
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| 188 | } |
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| 189 | $rs = $ADODB_SESS_CONN->Replace($ADODB_SESSION_TBL, |
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| 190 | $arr, |
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| 191 | 'sesskey',$autoQuote = true); |
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| 192 | |
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| 193 | if (!$rs) { |
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[34] | 194 | ADOConnection::outp( ' |
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| 195 | -- Session Replace: '.$ADODB_SESS_CONN->ErrorMsg().'</p>',false); |
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[2] | 196 | } else { |
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| 197 | // bug in access driver (could be odbc?) means that info is not commited |
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| 198 | // properly unless select statement executed in Win2000 |
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| 199 | |
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| 200 | if ($ADODB_SESS_CONN->databaseType == 'access') $rs = $ADODB_SESS_CONN->Execute("select sesskey from $ADODB_SESSION_TBL WHERE sesskey='$key'"); |
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| 201 | } |
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| 202 | return isset($rs); |
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| 203 | } |
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| 204 | |
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| 205 | function adodb_sess_destroy($key) |
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| 206 | { |
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| 207 | global $ADODB_SESS_CONN, $ADODB_SESSION_TBL,$ADODB_SESSION_EXPIRE_NOTIFY; |
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| 208 | |
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| 209 | if ($ADODB_SESSION_EXPIRE_NOTIFY) { |
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| 210 | reset($ADODB_SESSION_EXPIRE_NOTIFY); |
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| 211 | $fn = next($ADODB_SESSION_EXPIRE_NOTIFY); |
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| 212 | $savem = $ADODB_SESS_CONN->SetFetchMode(ADODB_FETCH_NUM); |
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| 213 | $rs = $ADODB_SESS_CONN->Execute("SELECT expireref,sesskey FROM $ADODB_SESSION_TBL WHERE sesskey='$key'"); |
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| 214 | $ADODB_SESS_CONN->SetFetchMode($savem); |
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| 215 | if ($rs) { |
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| 216 | $ADODB_SESS_CONN->BeginTrans(); |
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| 217 | while (!$rs->EOF) { |
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| 218 | $ref = $rs->fields[0]; |
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| 219 | $key = $rs->fields[1]; |
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| 220 | $fn($ref,$key); |
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| 221 | $del = $ADODB_SESS_CONN->Execute("DELETE FROM $ADODB_SESSION_TBL WHERE sesskey='$key'"); |
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| 222 | $rs->MoveNext(); |
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| 223 | } |
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| 224 | $ADODB_SESS_CONN->CommitTrans(); |
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| 225 | } |
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| 226 | } else { |
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| 227 | $qry = "DELETE FROM $ADODB_SESSION_TBL WHERE sesskey = '$key'"; |
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| 228 | $rs = $ADODB_SESS_CONN->Execute($qry); |
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| 229 | } |
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| 230 | return $rs ? true : false; |
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| 231 | } |
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| 232 | |
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| 233 | |
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| 234 | function adodb_sess_gc($maxlifetime) { |
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| 235 | global $ADODB_SESS_CONN, $ADODB_SESSION_TBL,$ADODB_SESSION_EXPIRE_NOTIFY,$ADODB_SESS_DEBUG; |
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| 236 | |
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| 237 | if ($ADODB_SESSION_EXPIRE_NOTIFY) { |
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| 238 | reset($ADODB_SESSION_EXPIRE_NOTIFY); |
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| 239 | $fn = next($ADODB_SESSION_EXPIRE_NOTIFY); |
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| 240 | $savem = $ADODB_SESS_CONN->SetFetchMode(ADODB_FETCH_NUM); |
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| 241 | $t = time(); |
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| 242 | $rs = $ADODB_SESS_CONN->Execute("SELECT expireref,sesskey FROM $ADODB_SESSION_TBL WHERE expiry < $t"); |
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| 243 | $ADODB_SESS_CONN->SetFetchMode($savem); |
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| 244 | if ($rs) { |
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| 245 | $ADODB_SESS_CONN->BeginTrans(); |
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| 246 | while (!$rs->EOF) { |
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| 247 | $ref = $rs->fields[0]; |
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| 248 | $key = $rs->fields[1]; |
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| 249 | $fn($ref,$key); |
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| 250 | //$del = $ADODB_SESS_CONN->Execute("DELETE FROM $ADODB_SESSION_TBL WHERE sesskey='$key'"); |
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| 251 | $rs->MoveNext(); |
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| 252 | } |
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| 253 | $rs->Close(); |
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| 254 | |
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| 255 | $ADODB_SESS_CONN->Execute("DELETE FROM $ADODB_SESSION_TBL WHERE expiry < $t"); |
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| 256 | $ADODB_SESS_CONN->CommitTrans(); |
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| 257 | } |
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| 258 | } else { |
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| 259 | $qry = "DELETE FROM $ADODB_SESSION_TBL WHERE expiry < " . time(); |
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| 260 | $ADODB_SESS_CONN->Execute($qry); |
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| 261 | } |
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| 262 | |
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| 263 | // suggested by Cameron, "GaM3R" <gamr@outworld.cx> |
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| 264 | if (defined('ADODB_SESSION_OPTIMIZE')) |
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| 265 | { |
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[34] | 266 | global $ADODB_SESSION_DRIVER; |
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| 267 | |
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[2] | 268 | switch( $ADODB_SESSION_DRIVER ) { |
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| 269 | case 'mysql': |
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| 270 | case 'mysqlt': |
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| 271 | $opt_qry = 'OPTIMIZE TABLE '.$ADODB_SESSION_TBL; |
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| 272 | break; |
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| 273 | case 'postgresql': |
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| 274 | case 'postgresql7': |
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| 275 | $opt_qry = 'VACUUM '.$ADODB_SESSION_TBL; |
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| 276 | break; |
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| 277 | } |
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| 278 | } |
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| 279 | |
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| 280 | if ($ADODB_SESS_CONN->dataProvider === 'oci8') $sql = 'select TO_CHAR('.($ADODB_SESS_CONN->sysTimeStamp).', \'RRRR-MM-DD HH24:MI:SS\') from '. $ADODB_SESSION_TBL; |
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| 281 | else $sql = 'select '.$ADODB_SESS_CONN->sysTimeStamp.' from '. $ADODB_SESSION_TBL; |
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| 282 | |
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| 283 | $rs =& $ADODB_SESS_CONN->SelectLimit($sql,1); |
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| 284 | if ($rs && !$rs->EOF) { |
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| 285 | |
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| 286 | $dbts = reset($rs->fields); |
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| 287 | $rs->Close(); |
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| 288 | $dbt = $ADODB_SESS_CONN->UnixTimeStamp($dbts); |
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| 289 | $t = time(); |
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| 290 | if (abs($dbt - $t) >= ADODB_SESSION_SYNCH_SECS) { |
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| 291 | $msg = |
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[34] | 292 | __FILE__.": Server time for webserver {$_SERVER['HTTP_HOST']} not in synch with database: database=$dbt ($dbts), webserver=$t (diff=".(abs($dbt-$t)/3600)." hrs)"; |
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[2] | 293 | error_log($msg); |
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[34] | 294 | if ($ADODB_SESS_DEBUG) ADOConnection::outp(" |
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| 295 | -- $msg</p>"); |
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[2] | 296 | } |
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| 297 | } |
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| 298 | |
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| 299 | return true; |
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| 300 | } |
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| 301 | |
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| 302 | session_module_name('user'); |
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| 303 | session_set_save_handler( |
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| 304 | "adodb_sess_open", |
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| 305 | "adodb_sess_close", |
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| 306 | "adodb_sess_read", |
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| 307 | "adodb_sess_write", |
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| 308 | "adodb_sess_destroy", |
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| 309 | "adodb_sess_gc"); |
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| 310 | } |
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| 311 | |
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| 312 | /* TEST SCRIPT -- UNCOMMENT */ |
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| 313 | /* |
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| 314 | if (0) { |
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| 315 | |
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| 316 | session_start(); |
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[34] | 317 | $_SESSION['AVAR'] += 1; |
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| 318 | print " |
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| 319 | -- \$_SESSION['AVAR']={$_SESSION['AVAR']}</p>"; |
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[2] | 320 | } |
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| 321 | */ |
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| 322 | ?> |
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