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