database backed sessions

sessions.php

@@ -0,0 +1,92 @@
+<?
+	// Original from http://www.daniweb.com/code/snippet43.html
+
+	require_once "config.php";
+	require_once "db.php";
+
+	$session_expire = 600;
+
+	ini_set("session.gc_probability", 50);
+
+	function open ($s, $n) {
+	
+		global $session_connection;
+		
+		$session_connection = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);
+		
+		return true;
+	}
+
+	function read ($id){
+	
+		global $session_connection,$session_read;					 
+
+		$query = "SELECT data FROM ttrss_sessions WHERE id='$id'";
+
+		$res = db_query($session_connection, $query);
+		
+		if (db_num_rows($res) != 1) {
+		 	return "";
+		} else {
+			$session_read = db_fetch_assoc($res);
+			$session_read["data"] = base64_decode($session_read["data"]);
+			return $session_read["data"];
+		}
+	}
+
+	function write ($id, $data) {
+ 
+		if (! $data) { 
+			return false; 
+		}
+		
+		global $session_connection, $session_read, $session_expire;
+		
+		$expire = time() + $session_expire;
+		
+		$data = db_escape_string(base64_encode($data), $session_connection);
+		
+		if ($session_read) {
+		 	$query = "UPDATE ttrss_sessions SET data='$data', 
+					expire='$expire' WHERE id='$id'"; 
+		} else {
+		 	$query = "INSERT INTO ttrss_sessions (id, data, expire)
+					VALUES ('$id', '$data', '$expire')";
+		}
+		
+		db_query($session_connection, $query);
+		return true;
+	}
+
+	function close () {
+	
+		global $session_connection;
+		
+		db_close($session_connection);
+		
+		return true;
+	}
+
+	function destroy ($id) {
+	
+		global $session_connection;
+		
+		$query = "DELETE FROM ttrss_sessions WHERE id = '$id'";
+		
+		db_query($session_connection, $query);
+		
+		return true;
+	}
+
+	function gc ($expire) {
+	
+		global $session_connection;
+		
+		$query = "DELETE FROM ttrss_sessions WHERE expire < " . time();
+		
+		db_query($session_connection, $query);
+	}
+
+	session_set_save_handler ("open", "close", "read", "write", "destroy", "gc");
+	session_start();
+?>