function polskieZnaki($string, $czyPolskie) {
    if ($czyPolskie === true) {
        $string = $string.replace('A010', 'Ą');
        $string = $string.replace('a010', 'ą');
        $string = $string.replace('C010', 'Ć');
        $string = $string.replace('c010', 'ć');
        $string = $string.replace('E010', 'Ę');
        $string = $string.replace('e010', 'ę');
        $string = $string.replace('L010', 'Ł');
        $string = $string.replace('l010', 'ł');
        $string = $string.replace('N010', 'Ń');
        $string = $string.replace('n010', 'ń');
        $string = $string.replace('O010', 'Ó');
        $string = $string.replace('o010', 'ó');
        $string = $string.replace('S010', 'Ś');
        $string = $string.replace('s010', 'ś');
        $string = $string.replace('Z010', 'Ź');
        $string = $string.replace('z010', 'ź');
        $string = $string.replace('Z020', 'Ż');
        $string = $string.replace('z020', 'ż');
        $string = $string.replace('_', ' ');
    }
    else {


        $string = $string.replace('"', '"');
        $string = $string.replace('‚', '\'');
        $string = $string.replace('Ą', 'A010');
        $string = $string.replace('ą', 'a010');
        $string = $string.replace('Ć', 'C010');
        $string = $string.replace('ć', 'c010');
        $string = $string.replace('Ę', 'E010');
        $string = $string.replace('ę', 'e010');
        $string = $string.replace('Ł', 'L010');
        $string = $string.replace('ł', 'l010');
        $string = $string.replace('Ń', 'N010');
        $string = $string.replace('ń', 'n010');
        $string = $string.replace('Ó', 'O010');
        $string = $string.replace('ó', 'o010');
        $string = $string.replace('Ś', 'S010');
        $string = $string.replace('ś', 's010');
        $string = $string.replace('Ź', 'Z010');
        $string = $string.replace('ź', 'z010');
        $string = $string.replace('Ż', 'Z020');
        $string = $string.replace('ż', 'z020');
        $string = $string.replace(' ', '_');

    }
    return $string;
}