PHP custom Session Sample Share _php instance

The following is the code for the session class

Copy Code code as follows:

<?php
Class session
{
static function init ()
{
Session_set_save_handler (
Array ("Session", "open"),
Array ("session", "Close"),
Array ("session", "read"),
Array ("Session", "write"),
Array ("Session", "destroy"),
Array ("Session", "GC")
);
}

static function open ($save _path, $session _name)
{
echo "Session opening!<br>";
/*global $db, $REMOTE _addr;
$rs = $db->execute ("select * from Sessions where sessionid= '". session_id (). "'");
$arry = $rs->fetchrow ();
if ($rs && $arry)
{
$db->execute ("Update Sessions set Sessionlast=now () where sessionid= '". session_id (). "'");
}
Else
{
$query = "INSERT into Sessions set sessionid= '". session_id (). "', sessionname= ' $REMOTE _addr ', sessionlast= ' Now () '";
Echo $query;
$db->execute ($query);
}*/
return true;
}
static function Close ()
{
return (true);
}

static function read ($id)
{
echo "Session reading Now!<br>";
Global $db;
return true;
$timenow = strftime ("%y-%m-%d%h:%m:%s", Time ());
$query = "Select Sessiondata from Sessions where sessionid= ' $id ' and sessionlast > ' $timenow '";
$rs = $db->execute ($query);
if (list ($SessionData) = $rs->fetchrow ())
{
Echo $SessionData;
return $SessionData;
}
Else
{
return false;
}
}

static function Write ($id, $sess _data)
{
echo "Session writing now!<br>";
Global $db;
$rs = $db->execute ("Select SessionID from Sessions where sessionid= ' $id ')";
$num = $rs->recordcount ();
$unix _time = time () +my_sess_time;
Echo my_sess_time;
$dateleft = strftime ("%y-%m-%d%h:%m:%s", $unix _time);
if ($num <= 0)
{
$sql = "INSERT into Sessions set sessiondata= ' $sess _data ', Sessionname= '". $_server["REMOTE_ADDR"]. "', sessionlast= ' $ Dateleft ', sessionid= '. session_id (). "'";
}
Else
{
$sql = "Update Sessions set sessiondata= ' $sess _data ', Sessionname= '". $_server["REMOTE_ADDR"]. "', sessionlast= ' $ Dateleft ' where sessionid= ' $id ';
}
$db->execute ($sql);
}

static function Destroy ($ID)
{
echo "Session destroying Now!<br>";
Global $db;
$sql = "DELETE from Sessions WHERE ' SessionID ' = ' $id '";
$rs = $db->execute ($sql);
return $rs;
$sess _file = "$sess _save_path/sess_$id";
Return (@unlink ($sess _file));
}

/*********************************************
* Warning-you'll need to implement some *
* Sort of garbage collection routine here. *
*********************************************/
static function gc ($MAXLIFETIME)
{
echo "Session Maxlifetime now!<br>";
Global $db;
$timenow = strftime ("%y-%m-%d%h:%m:%s", Time ());
$sql = "DELETE from ' $table _sessions ' WHERE ' sessionlast ' < ' $timenow '";
Return $sess _db->execute ($sql);
echo "Now gc!<br>";
return true;
}
Proceed to use sessions normally
}

How to use

Copy Code code as follows:

Include ("session.class.php");
Session::init ();
Session_Start ();
Define ("My_sess_time", 3600); Session Survival Time Long
$_session["test"] = "abcdef";