php自定义session示例分享_php实例

下面为session类的代码

<?php<BR>class session<BR>{<BR> static function init()<BR> {<BR>  session_set_save_handler(<BR>    array("session","open"),<BR>    array("session","close"),<BR>    array("session","read"),<BR>    array("session","write"),<BR>    array("session","destroy"),<BR>    array("session","gc")<BR>  );<BR> }<br><br> static function open($save_path,$session_name)<BR> {<BR>  echo "session opening!<br>";<BR>  /*global $db,$REMOTE_ADDR;<BR>   $rs = $db->Execute("select * from Sessions where SessionID='".session_id()."'");<BR>  $arry=$rs->FetchRow();<BR>  if( $rs && $arry)<BR>  {<BR>  $db->Execute("update Sessions set SessionLast=NOW() where SessionID='".session_id()."'");<BR>  }<BR>  else<BR>  {<BR>  $query = "insert into Sessions set SessionID='".session_id()."',SessionName='$REMOTE_ADDR',SessionLast='NOW()'";<BR>  //echo $query;<BR>  $db->Execute($query);<BR>  }*/<BR>  return true;<BR> }<BR> static function close()<BR> {<BR>  return(true);<BR> }<br><br> static function read($id)<BR> {<BR>  echo "session reading now!<br>";<BR>  global $db;<BR>  return true;<BR>  $timenow = strftime("%Y-%m-%d %H:%M:%S", time());<BR>  $query = "select SessionData from Sessions where SessionID='$id' and SessionLast > '$timenow'";<BR>  $rs = $db->Execute($query);<BR>  if(list($SessionData) = $rs->FetchRow())<BR>  {<BR>   //echo $SessionData;<BR>   return $SessionData;<BR>  }<BR>  else<BR>  {<BR>   return false;<BR>  }<BR> }<br><br> static function write($id,$sess_data)<BR> {<BR>  echo "session writing now!<br>";<BR>  global $db;<BR>  $rs = $db->Execute("select SessionID from Sessions where SessionID='$id'");<BR>  $num = $rs->RecordCount();<BR>  $unix_time = time()+MY_SESS_TIME;<BR>  //echo MY_SESS_TIME;<BR>  $dateleft = strftime("%Y-%m-%d %H:%M:%S", $unix_time);<BR>  if($num <= 0)<BR>  {<BR>   $sql = "insert into Sessions set SessionData='$sess_data', SessionName='".$_SERVER["REMOTE_ADDR"]."', SessionLast='$dateleft', SessionID='".session_id()."'";<BR>  }<BR>  else<BR>  {<BR>   $sql = "update Sessions set SessionData='$sess_data', SessionName='".$_SERVER["REMOTE_ADDR"]."', SessionLast='$dateleft' where SessionID='$id'";<BR>  }<BR>  $db->Execute($sql);<BR> }<br><br> static function destroy($id)<BR> {<BR>  echo "session destroying now!<br>";<BR>  global $db;<BR>  $sql = "DELETE FROM Sessions WHERE `SessionID` = '$id'";<BR>  $rs = $db->Execute($sql);<BR>  return $rs;<BR>  // $sess_file = "$sess_save_path<b style="color:transparent">（、本文来源gao@!dai!ma.com搞$$代^@码网*</b><i>搞gaodaima代码</i>/sess_$id";<BR>  //return(@unlink($sess_file));<BR> }<br><br> /*********************************************<BR>  * WARNING - You will need to implement some *<BR> * sort of garbage collection routine here. *<BR> *********************************************/<BR> static function gc($maxlifetime)<BR> {<BR>  echo "session maxlifetime now!<br>";<BR>  global $db;<BR>  $timenow = strftime("%Y-%m-%d %H:%M:%S", time());<BR>  $sql = "DELETE FROM `$table_sessions` WHERE `SessionLast` < '$timenow'";<BR>  return $sess_db->Execute($sql);<BR>  //echo "now gc!<br>";<BR>  return true;<BR> }<BR> // proceed to use sessions normally<BR>}<BR>

使用方法

include("session.class.php"); <BR>session::init(); <BR>session_start(); <BR>define("MY_SESS_TIME", 3600); //SESSION 生存时长 <BR>$_SESSION["test"] = "abcdef";<BR>

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