public function setVariable($var, $value, $link = null)
{
$link = $this->getLink($link);
if ($link === false) {
return false;
}
$current_value = $this->getVariable($var, self::GETVAR_SESSION, $link);
if ($current_value == $value) {
return true;
}
return $this->query("SET " . $var . " = " . $value . ';', $link);
}