function strtolowerTR($text) {
    $TRBul=array('Ğ','Ü','Ş','İ','Ö','Ç','ğ','ü','ş','ı','ö','ç');
    $TRDegistir=array('g','u','s','i','o','c','g','u','s','i','o','c');
    $text=str_replace($TRBul,$TRDegistir,$text);
    $text=strtolower($text);
    return $text;
}