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diff --git a/includes/core.php b/includes/core.php
--- a/includes/core.php
+++ b/includes/core.php
@@ -41,7 +41,7 @@
* @return string the username
*/
function get_username ($user_id) {
- global $db;
+ $db = sql_db::load();
$user_id = $db->sql_escape($user_id);
$sql = 'SELECT username FROM '. TABLE_USERS . " WHERE user_id = '$userid'";
@@ -54,7 +54,7 @@
* @return string the user ID
*/
function get_userid ($username) {
- global $db;
+ $db = sql_db::load();
$username = $db->sql_escape($username);
$sql = 'SELECT user_id FROM '. TABLE_USERS . " WHERE username LIKE '$username'";
diff --git a/includes/document.php b/includes/document.php
--- a/includes/document.php
+++ b/includes/document.php
@@ -254,7 +254,7 @@
* Prints the document body
*/
public function render_body () {
- global $db, $Config, $Session, $CurrentUser;
+ global $Config, $Session, $CurrentUser;
$document = $this;
//404 header
@@ -300,14 +300,14 @@
* Prints the document
*
* Use this method if you don't wish to have access to any other global
- * variables than $db, $Config, $Session and $CurrentUser.
+ * variables than $Config, $Session and $CurrentUser.
*
* A more flexible method is the body of this method in _includes/body.php
* and to add in your skin <?php include('_includes/body.php'); ?>
*/
function render () {
//Global variables for the header and the footer
- global $db, $Config, $Session, $CurrentUser;
+ global $Config, $Session, $CurrentUser;
$document = $this;
//HTML output
diff --git a/includes/error.php b/includes/error.php
--- a/includes/error.php
+++ b/includes/error.php
@@ -78,7 +78,7 @@
break;
case SQL_ERROR:
- global $db;
+ $db = sql_db::load();
$title = $title ? $title : "SQL error";
//Gets SQL error information
diff --git a/includes/mysqli.php b/includes/mysqli.php
--- a/includes/mysqli.php
+++ b/includes/mysqli.php
@@ -27,6 +27,13 @@
private $db;
/**
+ * Singleton instance
+ *
+ * @var sql_db
+ */
+ private static $instance = null;
+
+ /**
* Initializes a new instance of the database abstraction class, for MySQLi engine
*/
function __construct($host = 'localhost', $username = '', $password = '', $database = '') {
@@ -37,6 +44,27 @@
if ($database != '') {
$this->db->select_db($database);
}
+
+ $db->set_charset('utf8');
+ }
+
+ static function load() {
+ if (self::$instance === null) {
+ self::makeSingletonInstance();
+ }
+
+ return self::$instance;
+ }
+
+ private static function makeSingletonInstance() {
+ global $Config;
+
+ self::$instance = new sql_db(
+ $Config['sql']['host'], $Config['sql']['username'],
+ $Config['sql']['password'], $Config['sql']['database']
+ );
+
+ unset($Config['sql']);
}
/**
@@ -137,13 +165,4 @@
$this->db->set_charset($encoding);
}
}
-
- //Creates an instance of this database class with configuration values
- $db = new sql_db($Config['sql']['host'], $Config['sql']['username'], $Config['sql']['password'], $Config['sql']['database']);
-
- //To improve security, we unset sql parameters
- unset($Config['sql']);
-
- //Sets SQL connexion in UTF-8.
- $db->set_charset('utf8');
}
diff --git a/includes/objects/user.php b/includes/objects/user.php
--- a/includes/objects/user.php
+++ b/includes/objects/user.php
@@ -24,7 +24,7 @@
public $active = 0;
public $email;
public $regdate;
-
+
/*
* Initializes a new instance
* @param int $id the primary key
@@ -35,7 +35,7 @@
$this->load_from_database();
}
}
-
+
/*
* Loads the object User (ie fill the properties) from the $_POST array
*/
@@ -47,24 +47,24 @@
if (array_key_exists('email', $_POST)) $this->email = $_POST['email'];
if (array_key_exists('regdate', $_POST)) $this->regdate = $_POST['regdate'];
}
-
+
/*
* Loads the object User (ie fill the properties) from the database
*/
function load_from_database () {
- global $db;
+ $db = sql_db::load();
$sql = "SELECT * FROM " . TABLE_USERS . " WHERE user_id = '" . $this->id . "'";
if ( !($result = $db->sql_query($sql)) ) message_die(SQL_ERROR, "Unable to query users", '', __LINE__, __FILE__, $sql);
if (!$row = $db->sql_fetchrow($result)) {
$this->lastError = "User unkwown: " . $this->id;
return false;
}
-
+
$this->load_from_row($row);
-
+
return true;
}
-
+
/*
* Loads the object User (ie fill the properties) from the database row
*/
@@ -76,13 +76,13 @@
$this->email = $row['user_email'];
$this->regdate = $row['user_regdate'];
}
-
+
/*
* Saves to database
*/
function save_to_database () {
- global $db;
-
+ $db = sql_db::load();
+
$id = $this->id ? "'" . $db->sql_escape($this->id) . "'" : 'NULL';
$name = $db->sql_escape($this->name);
$password = $db->sql_escape($this->password);
@@ -95,18 +95,18 @@
if (!$db->sql_query($sql)) {
message_die(SQL_ERROR, "Unable to save user", '', __LINE__, __FILE__, $sql);
}
-
+
if (!$this->id) {
//Gets new record id value
$this->id = $db->sql_nextid();
}
}
-
+
/*
* Updates the specified field in the database record
*/
function save_field ($field) {
- global $db;
+ $db = sql_db::load();
if (!$this->id) {
message_die(GENERAL_ERROR, "You're trying to update a record not yet saved in the database");
}
@@ -117,13 +117,13 @@
message_die(SQL_ERROR, "Unable to save $field field", '', __LINE__, __FILE__, $sql);
}
}
-
+
/*
* Generates a unique user id
*/
function generate_id () {
- global $db;
-
+ $db = sql_db::load();
+
do {
$this->id = mt_rand(2001, 9999);
$sql = "SELECT COUNT(*) FROM " . TABLE_USERS . " WHERE user_id = $this->id";
@@ -131,9 +131,9 @@
message_die(SQL_ERROR, "Can't check if a user id is free", '', __LINE__, __FILE__, $sql);
}
$row = $db->sql_fetchrow($result);
- } while ($row[0]);
+ } while ($row[0]);
}
-
+
/*
* Fills password field with encrypted version
* of the specified clear password
@@ -148,7 +148,8 @@
* @return boolean true if the login is avaiable ; otherwise, false.
*/
public static function is_available_login ($login) {
- global $db;
+ $db = sql_db::load();
+
$sql = "SELECT COUNT(*) FROM " . TABLE_USERS . " WHERE username = '$login'";
if (!$result = $db->sql_query($sql)) {
message_die(SQL_ERROR, "Can't check if the specified login is available", '', __LINE__, __FILE__, $sql);
@@ -156,10 +157,10 @@
$row = $db->sql_fetchrow($result);
return ($row[0] == 0);
}
-
+
/*
* Initializes a new User instance ready to have its property filled
- * @return User the new user instance
+ * @return User the new user instance
*/
public static function create () {
$user = new User();
@@ -167,25 +168,26 @@
$user->active = true;
return $user;
}
-
+
/*
* Gets user from specified e-mail
* @return User the user matching the specified e-mail ; null, if the mail were not found.
*/
public static function get_user_from_email ($mail) {
- global $db;
+ $db = sql_db::load();
+
$sql = "SELECT username FROM " . TABLE_USERS . " WHERE user_email = '$mail'";
if (!$result = $db->sql_query($sql)) {
message_die(SQL_ERROR, "Can't get user", '', __LINE__, __FILE__, $sql);
}
-
+
if ($row = $db->sql_fetchrow($result)) {
//E-mail found.
$user = new User();
$user->load_from_row($row);
return $user;
}
-
+
//E-mail not found.
return null;
}
diff --git a/includes/session.php b/includes/session.php
--- a/includes/session.php
+++ b/includes/session.php
@@ -86,7 +86,8 @@
* ii. sets offline relevant sessions
*/
public static function clean_old_sessions () {
- global $db, $Config;
+ global $Config;
+ $db = sql_db::load();
//Gets session and online status lifetime (in seconds)
//If not specified in config, sets default 5 and 120 minutes values
@@ -109,7 +110,8 @@
* Updates or creates a session in the database
*/
public function update () {
- global $db, $Config;
+ global $Config;
+ $db = sql_db::load();
//Cleans up session
//To boost SQL performances, try a random trigger
@@ -136,7 +138,8 @@
if ($count == -1) {
//Queries sessions table
- global $db, $Config;
+ global $Config;
+ $db = sql_db::load();
$resource = array_key_exists('ResourceID', $Config) ? '\'' . $db->sql_escape($Config['ResourceID']) . '\'' : 'default';
$sql = "SELECT count(*) FROM " . TABLE_SESSIONS . " WHERE session_resource = $resource AND session_online = 1";
@@ -153,7 +156,7 @@
* @return string the session specified field's value
*/
public function get_info ($info) {
- global $db;
+ $db = sql_db::load();
$id = $db->sql_escape($this->id);
$sql = "SELECT `$info` FROM " . TABLE_SESSIONS . " WHERE session_id = '$id'";
@@ -166,7 +169,7 @@
* @param string $value the value to set
*/
public function set_info ($info, $value) {
- global $db;
+ $db = sql_db::load();
$value = ($value === null) ? 'NULL' : "'" . $db->sql_escape($value) . "'";
$id = $db->sql_escape($this->id);
@@ -180,7 +183,7 @@
* @return User the logged user information
*/
public function get_logged_user () {
- global $db;
+ $db = sql_db::load();;
//Gets session information
$id = $db->sql_escape($this->id);
@@ -216,7 +219,7 @@
* @param string $user_id the user ID
*/
public function user_login ($user_id) {
- global $db;
+ $db = sql_db::load();
//Sets specified user ID in sessions table
$user_id = $db->sql_escape($user_id);
@@ -230,7 +233,7 @@
* Updates the session in an user logout context
*/
public function user_logout () {
- global $db;
+ $db = sql_db::load();
//Sets anonymous user in sessions table
$user_id = $db->sql_escape(ANONYMOUS_USER);

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