php: ucfirst и utf8 (фраза с большой буквы)

if (!function_exists('mb_ucfirst') && function_exists('mb_substr')) { 
	function mb_ucfirst($string) {  
		$string = mb_ereg_replace("^[\ ]+","", $string);  
		$string = mb_strtoupper(mb_substr($string, 0, 1, "UTF-8"), "UTF-8").mb_substr($string, 1, mb_strlen($string), "UTF-8" );  
		return $string;  
	}
}
$text=mb_ucfirst($text);