public function clean_text_match ($text, $all_words)
{
	//global $db, $bb_cfg;
	
	$text = ' '. mb_strtolower($text, 'UTF-8') .' ';
	
	if ($all_words)
	{
		$text = preg_replace('#\s(\b\w)#', ' +$1', $text);
	}
	//$text_match_sql = $db->escape(trim($text));
	
	return $text;
}
	
public function aaaAction()
{
	echo $this->clean_text_match( 'секс в большом городе', true );
}