database_store.inc

来自「《php程序设计》的配套源码 《php程序设计》的配套源码 《php程序」· INC 代码 · 共 55 行

function open ($save_path,$session_name) {
  global $table;

  mysql_connect('localhost');
  mysql_select_db($save_path);

  $table = $session_name;

  return true;
}

function read($session_id) {
  global $table;
  $result = mysql_query("SELECT value FROM $table
                         WHERE session_id='$session_id'");
  if($result &&mysql_num_rows($result)) {
    return mysql_result($result,0);
  } else {
    error_log("read:".mysql_error()."\n",3,"/tmp/errors.log");
    return "";
  }
}

function write($session_id,$data) {
  global $table;
  $data = addslashes($data);
  mysql_query("REPLACE INTO $table (session_id,value)
               VALUES('$session_id','$data')")
  or error_log("write:".mysql_error()."\n",3,"/tmp/errors.log");
  return true;
}

function close() {
  mysql_close();

  return true;
}

function destroy($session_id) {
  global $table;

  mysql_query("DELETE FROM $table WHERE session_id ='$session_id'";

  return true;
}

function gc($max_time) {
  global $table;
  mysql_query(
    "DELETE FROM $table WHERE UNIX_TIMESTAMP(expiration)
     < UNIX_TIMESTAMP()-$max_time")
    or error_log("gc:".mysql_error()."\n",3,"/tmp/errors.log");
  return true;
}