PHP encapsulated Database Save session function class _php tips

This example describes the PHP encapsulated database save session function class. Share to everyone for your reference, specific as follows:

PHP saves the session class with the database:

<?php class Safesessionhandler implements Sessionhandlerinterface {public $save _path;
  Public $session _name;
  Public $table;
  Public Function __construct () {$this->table = new Table ("Safe_session");
    Private Function Session_id_parse ($session _id) {$time = Hexdec (substr ($session _id, 0, 8));
    $skey = substr ($session _id, 8);
  Return Array ($time, $skey);
    Public function Close () {Loginfo (' close: ');
  return true;
    The Public Function Create_sid () {Loginfo ("Create_sid:");
    $time = time ();
    $skey = "";
    $char = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
    For ($i =0 $i <52; $i + +) {$skey. = $char {Mt_rand (0, 61)};
    $session = Array ("Time" => $time, "Skey" => $skey, "Sval" => "",);
    $this->table->insert ($session); Return Dechex ($time).
  $skey;
    The Public function destroy ($session _id) {loginfo ("Destroy:%s", $session _id); List ($time, $skey) = $this->session_id_parse ($session _id);
    $this->table->where ("time =?", $time)->where ("Skey =?", $skey)->delete ();
  return true;
    The Public Function gc ($maxlifetime) {loginfo ("GC:%s", $maxlifetime);
    $this->table->where ("Time <.", Time ()-86400 *)->delete ();
  return true;
    Public function open ($save _path, $session _name) {loginfo ("Open:%s,%s", $save _path, $session _name);
    $this->save_path = $save _path;
    $this->session_name = $session _name;
  return true;
    The public function read ($session _id) {loginfo ("read:%s", $session _id);
    List ($time, $skey) = $this->session_id_parse ($session _id);
    $row = $this->table->where ("time =?", $time)->where ("Skey =?", $skey)->select ()->fetch ();
    if (empty ($row)) {return "";
  return $row ["Sval"];
    Public Function Write ($session _id, $session _data) {loginfo ("write:%s,%s", $session _id, $session _data); $session = Array ("Sval" => $session _data);
    List ($time, $skey) = $this->session_id_parse ($session _id);
    $this->table->where ("time =?", $time)->where ("Skey =?", $skey)->update ($session);
  return true;

 }
}

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I hope this article will help you with the PHP program design.