[2] | 1 | <?php |
---|
| 2 | /* |
---|
[34] | 3 | V4.94 23 Jan 2007 (c) 2000-2007 John Lim (jlim#natsoft.com.my). All rights reserved. |
---|
[2] | 4 | Released under both BSD license and Lesser GPL library license. |
---|
| 5 | Whenever there is any discrepancy between the two licenses, |
---|
| 6 | the BSD license will take precedence. |
---|
| 7 | Made table name configurable - by David Johnson djohnson@inpro.net |
---|
| 8 | Encryption by Ari Kuorikoski <ari.kuorikoski@finebyte.com> |
---|
| 9 | |
---|
| 10 | Set tabs to 4 for best viewing. |
---|
| 11 | |
---|
| 12 | Latest version of ADODB is available at http://php.weblogs.com/adodb |
---|
| 13 | ====================================================================== |
---|
| 14 | |
---|
| 15 | This file provides PHP4 session management using the ADODB database |
---|
| 16 | wrapper library. |
---|
| 17 | |
---|
| 18 | Example |
---|
| 19 | ======= |
---|
| 20 | |
---|
| 21 | include('adodb.inc.php'); |
---|
| 22 | #---------------------------------# |
---|
| 23 | include('adodb-cryptsession.php'); |
---|
| 24 | #---------------------------------# |
---|
| 25 | session_start(); |
---|
| 26 | session_register('AVAR'); |
---|
[34] | 27 | $_SESSION['AVAR'] += 1; |
---|
| 28 | print " |
---|
| 29 | -- \$_SESSION['AVAR']={$_SESSION['AVAR']}</p>"; |
---|
[2] | 30 | |
---|
| 31 | |
---|
| 32 | Installation |
---|
| 33 | ============ |
---|
| 34 | 1. Create a new database in MySQL or Access "sessions" like |
---|
| 35 | so: |
---|
| 36 | |
---|
| 37 | create table sessions ( |
---|
| 38 | SESSKEY char(32) not null, |
---|
| 39 | EXPIRY int(11) unsigned not null, |
---|
| 40 | EXPIREREF varchar(64), |
---|
| 41 | DATA CLOB, |
---|
| 42 | primary key (sesskey) |
---|
| 43 | ); |
---|
| 44 | |
---|
| 45 | 2. Then define the following parameters. You can either modify |
---|
| 46 | this file, or define them before this file is included: |
---|
| 47 | |
---|
| 48 | $ADODB_SESSION_DRIVER='database driver, eg. mysql or ibase'; |
---|
| 49 | $ADODB_SESSION_CONNECT='server to connect to'; |
---|
| 50 | $ADODB_SESSION_USER ='user'; |
---|
| 51 | $ADODB_SESSION_PWD ='password'; |
---|
| 52 | $ADODB_SESSION_DB ='database'; |
---|
| 53 | $ADODB_SESSION_TBL = 'sessions' |
---|
| 54 | |
---|
| 55 | 3. Recommended is PHP 4.0.2 or later. There are documented |
---|
| 56 | session bugs in earlier versions of PHP. |
---|
| 57 | |
---|
| 58 | */ |
---|
| 59 | |
---|
| 60 | |
---|
| 61 | include_once('crypt.inc.php'); |
---|
| 62 | |
---|
| 63 | if (!defined('_ADODB_LAYER')) { |
---|
| 64 | include (dirname(__FILE__).'/adodb.inc.php'); |
---|
| 65 | } |
---|
| 66 | |
---|
| 67 | /* if database time and system time is difference is greater than this, then give warning */ |
---|
| 68 | define('ADODB_SESSION_SYNCH_SECS',60); |
---|
| 69 | |
---|
| 70 | if (!defined('ADODB_SESSION')) { |
---|
| 71 | |
---|
| 72 | define('ADODB_SESSION',1); |
---|
| 73 | |
---|
| 74 | GLOBAL $ADODB_SESSION_CONNECT, |
---|
| 75 | $ADODB_SESSION_DRIVER, |
---|
| 76 | $ADODB_SESSION_USER, |
---|
| 77 | $ADODB_SESSION_PWD, |
---|
| 78 | $ADODB_SESSION_DB, |
---|
| 79 | $ADODB_SESS_CONN, |
---|
| 80 | $ADODB_SESS_LIFE, |
---|
| 81 | $ADODB_SESS_DEBUG, |
---|
| 82 | $ADODB_SESS_INSERT, |
---|
| 83 | $ADODB_SESSION_EXPIRE_NOTIFY, |
---|
| 84 | $ADODB_SESSION_TBL; |
---|
| 85 | |
---|
| 86 | //$ADODB_SESS_DEBUG = true; |
---|
| 87 | |
---|
| 88 | /* SET THE FOLLOWING PARAMETERS */ |
---|
| 89 | if (empty($ADODB_SESSION_DRIVER)) { |
---|
| 90 | $ADODB_SESSION_DRIVER='mysql'; |
---|
| 91 | $ADODB_SESSION_CONNECT='localhost'; |
---|
| 92 | $ADODB_SESSION_USER ='root'; |
---|
| 93 | $ADODB_SESSION_PWD =''; |
---|
| 94 | $ADODB_SESSION_DB ='xphplens_2'; |
---|
| 95 | } |
---|
| 96 | |
---|
| 97 | if (empty($ADODB_SESSION_TBL)){ |
---|
| 98 | $ADODB_SESSION_TBL = 'sessions'; |
---|
| 99 | } |
---|
| 100 | |
---|
| 101 | if (empty($ADODB_SESSION_EXPIRE_NOTIFY)) { |
---|
| 102 | $ADODB_SESSION_EXPIRE_NOTIFY = false; |
---|
| 103 | } |
---|
| 104 | |
---|
| 105 | function ADODB_Session_Key() |
---|
| 106 | { |
---|
| 107 | $ADODB_CRYPT_KEY = 'CRYPTED ADODB SESSIONS ROCK!'; |
---|
| 108 | |
---|
| 109 | /* USE THIS FUNCTION TO CREATE THE ENCRYPTION KEY FOR CRYPTED SESSIONS */ |
---|
| 110 | /* Crypt the used key, $ADODB_CRYPT_KEY as key and session_ID as SALT */ |
---|
| 111 | return crypt($ADODB_CRYPT_KEY, session_ID()); |
---|
| 112 | } |
---|
| 113 | |
---|
| 114 | $ADODB_SESS_LIFE = ini_get('session.gc_maxlifetime'); |
---|
| 115 | if ($ADODB_SESS_LIFE <= 1) { |
---|
| 116 | // bug in PHP 4.0.3 pl 1 -- how about other versions? |
---|
| 117 | //print "<h3>Session Error: PHP.INI setting <i>session.gc_maxlifetime</i>not set: $ADODB_SESS_LIFE</h3>"; |
---|
| 118 | $ADODB_SESS_LIFE=1440; |
---|
| 119 | } |
---|
| 120 | |
---|
| 121 | function adodb_sess_open($save_path, $session_name) |
---|
| 122 | { |
---|
| 123 | GLOBAL $ADODB_SESSION_CONNECT, |
---|
| 124 | $ADODB_SESSION_DRIVER, |
---|
| 125 | $ADODB_SESSION_USER, |
---|
| 126 | $ADODB_SESSION_PWD, |
---|
| 127 | $ADODB_SESSION_DB, |
---|
| 128 | $ADODB_SESS_CONN, |
---|
| 129 | $ADODB_SESS_DEBUG; |
---|
| 130 | |
---|
| 131 | $ADODB_SESS_INSERT = false; |
---|
| 132 | |
---|
| 133 | if (isset($ADODB_SESS_CONN)) return true; |
---|
| 134 | |
---|
| 135 | $ADODB_SESS_CONN = ADONewConnection($ADODB_SESSION_DRIVER); |
---|
| 136 | if (!empty($ADODB_SESS_DEBUG)) { |
---|
| 137 | $ADODB_SESS_CONN->debug = true; |
---|
| 138 | print" conn=$ADODB_SESSION_CONNECT user=$ADODB_SESSION_USER pwd=$ADODB_SESSION_PWD db=$ADODB_SESSION_DB "; |
---|
| 139 | } |
---|
| 140 | return $ADODB_SESS_CONN->PConnect($ADODB_SESSION_CONNECT, |
---|
| 141 | $ADODB_SESSION_USER,$ADODB_SESSION_PWD,$ADODB_SESSION_DB); |
---|
| 142 | |
---|
| 143 | } |
---|
| 144 | |
---|
| 145 | function adodb_sess_close() |
---|
| 146 | { |
---|
| 147 | global $ADODB_SESS_CONN; |
---|
| 148 | |
---|
| 149 | if ($ADODB_SESS_CONN) $ADODB_SESS_CONN->Close(); |
---|
| 150 | return true; |
---|
| 151 | } |
---|
| 152 | |
---|
| 153 | function adodb_sess_read($key) |
---|
| 154 | { |
---|
| 155 | $Crypt = new MD5Crypt; |
---|
| 156 | global $ADODB_SESS_CONN,$ADODB_SESS_INSERT,$ADODB_SESSION_TBL; |
---|
| 157 | $rs = $ADODB_SESS_CONN->Execute("SELECT data FROM $ADODB_SESSION_TBL WHERE sesskey = '$key' AND expiry >= " . time()); |
---|
| 158 | if ($rs) { |
---|
| 159 | if ($rs->EOF) { |
---|
| 160 | $ADODB_SESS_INSERT = true; |
---|
| 161 | $v = ''; |
---|
| 162 | } else { |
---|
| 163 | // Decrypt session data |
---|
| 164 | $v = rawurldecode($Crypt->Decrypt(reset($rs->fields), ADODB_Session_Key())); |
---|
| 165 | } |
---|
| 166 | $rs->Close(); |
---|
| 167 | return $v; |
---|
| 168 | } |
---|
| 169 | else $ADODB_SESS_INSERT = true; |
---|
| 170 | |
---|
| 171 | return ''; |
---|
| 172 | } |
---|
| 173 | |
---|
| 174 | function adodb_sess_write($key, $val) |
---|
| 175 | { |
---|
| 176 | $Crypt = new MD5Crypt; |
---|
| 177 | global $ADODB_SESS_INSERT,$ADODB_SESS_CONN, $ADODB_SESS_LIFE, $ADODB_SESSION_TBL,$ADODB_SESSION_EXPIRE_NOTIFY; |
---|
| 178 | |
---|
| 179 | $expiry = time() + $ADODB_SESS_LIFE; |
---|
| 180 | |
---|
| 181 | // encrypt session data.. |
---|
| 182 | $val = $Crypt->Encrypt(rawurlencode($val), ADODB_Session_Key()); |
---|
| 183 | |
---|
| 184 | $arr = array('sesskey' => $key, 'expiry' => $expiry, 'data' => $val); |
---|
| 185 | if ($ADODB_SESSION_EXPIRE_NOTIFY) { |
---|
| 186 | $var = reset($ADODB_SESSION_EXPIRE_NOTIFY); |
---|
| 187 | global $$var; |
---|
| 188 | $arr['expireref'] = $$var; |
---|
| 189 | } |
---|
| 190 | $rs = $ADODB_SESS_CONN->Replace($ADODB_SESSION_TBL, |
---|
| 191 | $arr, |
---|
| 192 | 'sesskey',$autoQuote = true); |
---|
| 193 | |
---|
| 194 | if (!$rs) { |
---|
[34] | 195 | ADOConnection::outp( ' |
---|
| 196 | -- Session Replace: '.$ADODB_SESS_CONN->ErrorMsg().'</p>',false); |
---|
[2] | 197 | } else { |
---|
| 198 | // bug in access driver (could be odbc?) means that info is not commited |
---|
| 199 | // properly unless select statement executed in Win2000 |
---|
| 200 | |
---|
| 201 | if ($ADODB_SESS_CONN->databaseType == 'access') $rs = $ADODB_SESS_CONN->Execute("select sesskey from $ADODB_SESSION_TBL WHERE sesskey='$key'"); |
---|
| 202 | } |
---|
| 203 | return isset($rs); |
---|
| 204 | } |
---|
| 205 | |
---|
| 206 | function adodb_sess_destroy($key) |
---|
| 207 | { |
---|
| 208 | global $ADODB_SESS_CONN, $ADODB_SESSION_TBL,$ADODB_SESSION_EXPIRE_NOTIFY; |
---|
| 209 | |
---|
| 210 | if ($ADODB_SESSION_EXPIRE_NOTIFY) { |
---|
| 211 | reset($ADODB_SESSION_EXPIRE_NOTIFY); |
---|
| 212 | $fn = next($ADODB_SESSION_EXPIRE_NOTIFY); |
---|
| 213 | $savem = $ADODB_SESS_CONN->SetFetchMode(ADODB_FETCH_NUM); |
---|
| 214 | $rs = $ADODB_SESS_CONN->Execute("SELECT expireref,sesskey FROM $ADODB_SESSION_TBL WHERE sesskey='$key'"); |
---|
| 215 | $ADODB_SESS_CONN->SetFetchMode($savem); |
---|
| 216 | if ($rs) { |
---|
| 217 | $ADODB_SESS_CONN->BeginTrans(); |
---|
| 218 | while (!$rs->EOF) { |
---|
| 219 | $ref = $rs->fields[0]; |
---|
| 220 | $key = $rs->fields[1]; |
---|
| 221 | $fn($ref,$key); |
---|
| 222 | $del = $ADODB_SESS_CONN->Execute("DELETE FROM $ADODB_SESSION_TBL WHERE sesskey='$key'"); |
---|
| 223 | $rs->MoveNext(); |
---|
| 224 | } |
---|
| 225 | $ADODB_SESS_CONN->CommitTrans(); |
---|
| 226 | } |
---|
| 227 | } else { |
---|
| 228 | $qry = "DELETE FROM $ADODB_SESSION_TBL WHERE sesskey = '$key'"; |
---|
| 229 | $rs = $ADODB_SESS_CONN->Execute($qry); |
---|
| 230 | } |
---|
| 231 | return $rs ? true : false; |
---|
| 232 | } |
---|
| 233 | |
---|
| 234 | |
---|
| 235 | function adodb_sess_gc($maxlifetime) { |
---|
| 236 | global $ADODB_SESS_CONN, $ADODB_SESSION_TBL,$ADODB_SESSION_EXPIRE_NOTIFY,$ADODB_SESS_DEBUG; |
---|
| 237 | |
---|
| 238 | if ($ADODB_SESSION_EXPIRE_NOTIFY) { |
---|
| 239 | reset($ADODB_SESSION_EXPIRE_NOTIFY); |
---|
| 240 | $fn = next($ADODB_SESSION_EXPIRE_NOTIFY); |
---|
| 241 | $savem = $ADODB_SESS_CONN->SetFetchMode(ADODB_FETCH_NUM); |
---|
| 242 | $t = time(); |
---|
| 243 | $rs = $ADODB_SESS_CONN->Execute("SELECT expireref,sesskey FROM $ADODB_SESSION_TBL WHERE expiry < $t"); |
---|
| 244 | $ADODB_SESS_CONN->SetFetchMode($savem); |
---|
| 245 | if ($rs) { |
---|
| 246 | $ADODB_SESS_CONN->BeginTrans(); |
---|
| 247 | while (!$rs->EOF) { |
---|
| 248 | $ref = $rs->fields[0]; |
---|
| 249 | $key = $rs->fields[1]; |
---|
| 250 | $fn($ref,$key); |
---|
| 251 | //$del = $ADODB_SESS_CONN->Execute("DELETE FROM $ADODB_SESSION_TBL WHERE sesskey='$key'"); |
---|
| 252 | $rs->MoveNext(); |
---|
| 253 | } |
---|
| 254 | $rs->Close(); |
---|
| 255 | |
---|
| 256 | $ADODB_SESS_CONN->Execute("DELETE FROM $ADODB_SESSION_TBL WHERE expiry < $t"); |
---|
| 257 | $ADODB_SESS_CONN->CommitTrans(); |
---|
| 258 | } |
---|
| 259 | } else { |
---|
| 260 | $qry = "DELETE FROM $ADODB_SESSION_TBL WHERE expiry < " . time(); |
---|
| 261 | $ADODB_SESS_CONN->Execute($qry); |
---|
| 262 | } |
---|
| 263 | |
---|
| 264 | // suggested by Cameron, "GaM3R" <gamr@outworld.cx> |
---|
| 265 | if (defined('ADODB_SESSION_OPTIMIZE')) |
---|
| 266 | { |
---|
[34] | 267 | global $ADODB_SESSION_DRIVER; |
---|
| 268 | |
---|
[2] | 269 | switch( $ADODB_SESSION_DRIVER ) { |
---|
| 270 | case 'mysql': |
---|
| 271 | case 'mysqlt': |
---|
| 272 | $opt_qry = 'OPTIMIZE TABLE '.$ADODB_SESSION_TBL; |
---|
| 273 | break; |
---|
| 274 | case 'postgresql': |
---|
| 275 | case 'postgresql7': |
---|
| 276 | $opt_qry = 'VACUUM '.$ADODB_SESSION_TBL; |
---|
| 277 | break; |
---|
| 278 | } |
---|
| 279 | } |
---|
| 280 | |
---|
| 281 | if ($ADODB_SESS_CONN->dataProvider === 'oci8') $sql = 'select TO_CHAR('.($ADODB_SESS_CONN->sysTimeStamp).', \'RRRR-MM-DD HH24:MI:SS\') from '. $ADODB_SESSION_TBL; |
---|
| 282 | else $sql = 'select '.$ADODB_SESS_CONN->sysTimeStamp.' from '. $ADODB_SESSION_TBL; |
---|
| 283 | |
---|
| 284 | $rs =& $ADODB_SESS_CONN->SelectLimit($sql,1); |
---|
| 285 | if ($rs && !$rs->EOF) { |
---|
| 286 | |
---|
| 287 | $dbts = reset($rs->fields); |
---|
| 288 | $rs->Close(); |
---|
| 289 | $dbt = $ADODB_SESS_CONN->UnixTimeStamp($dbts); |
---|
| 290 | $t = time(); |
---|
| 291 | if (abs($dbt - $t) >= ADODB_SESSION_SYNCH_SECS) { |
---|
| 292 | $msg = |
---|
[34] | 293 | __FILE__.": Server time for webserver {$_SERVER['HTTP_HOST']} not in synch with database: database=$dbt ($dbts), webserver=$t (diff=".(abs($dbt-$t)/3600)." hrs)"; |
---|
[2] | 294 | error_log($msg); |
---|
[34] | 295 | if ($ADODB_SESS_DEBUG) ADOConnection::outp(" |
---|
| 296 | -- $msg</p>"); |
---|
[2] | 297 | } |
---|
| 298 | } |
---|
| 299 | |
---|
| 300 | return true; |
---|
| 301 | } |
---|
| 302 | |
---|
| 303 | session_module_name('user'); |
---|
| 304 | session_set_save_handler( |
---|
| 305 | "adodb_sess_open", |
---|
| 306 | "adodb_sess_close", |
---|
| 307 | "adodb_sess_read", |
---|
| 308 | "adodb_sess_write", |
---|
| 309 | "adodb_sess_destroy", |
---|
| 310 | "adodb_sess_gc"); |
---|
| 311 | } |
---|
| 312 | |
---|
| 313 | /* TEST SCRIPT -- UNCOMMENT */ |
---|
| 314 | /* |
---|
| 315 | if (0) { |
---|
| 316 | |
---|
| 317 | session_start(); |
---|
| 318 | session_register('AVAR'); |
---|
[34] | 319 | $_SESSION['AVAR'] += 1; |
---|
| 320 | print " |
---|
| 321 | -- \$_SESSION['AVAR']={$_SESSION['AVAR']}</p>"; |
---|
[2] | 322 | } |
---|
| 323 | */ |
---|
| 324 | ?> |
---|