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<?php
/**
* Elgg configuration library
* Contains functions for managing system configuration
*
* @package Elgg
* @subpackage Core
* @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU Public License version 2
* @author Curverider Ltd
* @copyright Curverider Ltd 2008-2009
* @link http://elgg.org/
*/
/**
* Unset a config option.
*
* @param string $name The name of the field.
* @param int $site_guid Optionally, the GUID of the site (current site is assumed by default).
* @return mixed
*/
function unset_config($name, $site_guid = 0)
{
global $CONFIG;
$name = mysql_real_escape_string($name);
$site_guid = (int) $site_guid;
if ($site_guid == 0)
$site_guid = (int) $CONFIG->site_id;
return delete_data("delete from {$CONFIG->dbprefix}config where name='$name' and site_guid=$site_guid");
}
/**
* Sets a configuration value
*
* @param string $name The name of the configuration value
* @param string $value Its value
* @param int $site_guid Optionally, the GUID of the site (current site is assumed by default)
* @return false|int 1 or false depending on success or failure
*/
function set_config($name, $value, $site_guid = 0) {
global $CONFIG;
// Unset existing
unset_config($name,$site_guid);
$name = mysql_real_escape_string($name);
$value = mysql_real_escape_string($value);
$site_guid = (int) $site_guid;
if ($site_guid == 0)
$site_guid = (int) $CONFIG->site_id;
$CONFIG->$name = $value;
$value = sanitise_string(serialize($value));
return insert_data("insert into {$CONFIG->dbprefix}config set name = '{$name}', value = '{$value}', site_guid = {$site_guid}");
}
/**
* Gets a configuration value
*
* @param string $name The name of the config value
* @param int $site_guid Optionally, the GUID of the site (current site is assumed by default)
* @return mixed|false Depending on success
*/
function get_config($name, $site_guid = 0) {
global $CONFIG;
if (isset($CONFIG->$name))
return $CONFIG->$name;
$name = mysql_real_escape_string($name);
$site_guid = (int) $site_guid;
if ($site_guid == 0)
$site_guid = (int) $CONFIG->site_id;
if ($result = get_data_row("SELECT value from {$CONFIG->dbprefix}config where name = '{$name}' and site_guid = {$site_guid}")) {
$result = $result->value;
$result = unserialize($result->value);
$CONFIG->$name = $result;
return $result;
}
return false;
}
/**
* Gets all the configuration details in the config database for a given site.
*
* @param int $site_guid Optionally, the GUID of the site (current site is assumed by default)
*/
function get_all_config($site_guid = 0)
{
global $CONFIG;
$site_guid = (int) $site_guid;
if ($site_guid == 0)
$site_guid = (int) $CONFIG->site_id;
if ($result = get_data("SELECT * from {$CONFIG->dbprefix}config where site_guid = {$site_guid}")) {
foreach ($result as $r)
{
$name = $r->name;
$value = $r->value;
$CONFIG->$name = unserialize($value);
}
return true;
}
return false;
}
/**
* If certain configuration elements don't exist, autodetect sensible defaults
*
* @uses $CONFIG The main configuration global
*
*/
function set_default_config() {
global $CONFIG;
if (empty($CONFIG->path))
$CONFIG->path = str_replace("\\","/",dirname(dirname(dirname(__FILE__)))) . "/";
if (empty($CONFIG->viewpath))
$CONFIG->viewpath = $CONFIG->path . "views/";
if (empty($CONFIG->pluginspath))
$CONFIG->pluginspath = $CONFIG->path . "mod/";
if (empty($CONFIG->wwwroot)) {
/*
$CONFIG->wwwroot = "http://" . $_SERVER['SERVER_NAME'];
$request = $_SERVER['REQUEST_URI'];
if (strripos($request,"/") < (strlen($request) - 1)) {
// addressing a file directly, not a dir
$request = substr($request, 0, strripos($request,"/")+1);
}
$CONFIG->wwwroot .= $request;
*/
$pathpart = str_replace("//","/",str_replace($_SERVER['DOCUMENT_ROOT'],"",$CONFIG->path));
if (substr($pathpart,0,1) != "/") $pathpart = "/" . $pathpart;
$CONFIG->wwwroot = "http://" . $_SERVER['HTTP_HOST'] . $pathpart;
}
if (empty($CONFIG->url))
$CONFIG->url = $CONFIG->wwwroot;
if (empty($CONFIG->sitename))
$CONFIG->sitename = "New Elgg site";
if (empty($CONFIG->language))
$CONFIG->language = "en";
}
/**
* Function that provides some config initialisation on system init
*
*/
function configuration_init() {
global $CONFIG;
if (is_installed() || is_db_installed()) {
$path = datalist_get('path');
if (!empty($path))
$CONFIG->path = $path;
$dataroot = datalist_get('dataroot');
if (!empty($dataroot))
$CONFIG->dataroot = $dataroot;
$simplecache_enabled = datalist_get('simplecache_enabled');
if ($simplecache_enabled !== false) {
$CONFIG->simplecache_enabled = $simplecache_enabled;
} else {
$CONFIG->simplecache_enabled = 1;
}
$viewpath_cache_enabled = datalist_get('viewpath_cache_enabled');
if ($viewpath_cache_enabled !== false) {
$CONFIG->viewpath_cache_enabled = $viewpath_cache_enabled;
} else {
$CONFIG->viewpath_cache_enabled = 1;
}
if (isset($CONFIG->site) && ($CONFIG->site instanceof ElggSite)) {
$CONFIG->wwwroot = $CONFIG->site->url;
$CONFIG->sitename = $CONFIG->site->name;
$CONFIG->sitedescription = $CONFIG->site->description;
$CONFIG->siteemail = $CONFIG->site->email;
}
$CONFIG->url = $CONFIG->wwwroot;
// Load default settings from database
get_all_config();
return true;
}
}
/**
* Register config_init
*/
register_elgg_event_handler('boot','system','configuration_init',10);
?>
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