/**
* Reset the cache used in idFromName(). For use in tests.
*/
public static function resetIdByNameCache()
{
self::$idCacheByName = array();
}
/**
* Get database id given a user name
* @param $name \string Username
* @return \types{\int,\null} The corresponding user's ID, or null if user is nonexistent
*/
static function idFromName($name)
{
$nt = Title::makeTitleSafe(NS_USER, $name);
if (is_null($nt)) {
# Illegal name
return null;
}
if (isset(self::$idCacheByName[$name])) {
return self::$idCacheByName[$name];
}
$dbr = wfGetDB(DB_SLAVE);
$s = $dbr->selectRow('user', array('user_id'), array('user_name' => $nt->getText()), __METHOD__);
if ($s === false) {
$result = null;
} else {
$result = $s->user_id;
}
self::$idCacheByName[$name] = $result;
if (count(self::$idCacheByName) > 1000) {
self::$idCacheByName = array();
}
return $result;
}
