php - getting warning "Header may not contain more than a single header, new line detected"

Question

I am doing coding in oops for uploading image in PHP. But After submit image, it's giving warning

"Header may not contain more than a single header, new line detected"

Below is my function, on which its giving error

public function ft_redirect($query = '') {

    if (REQUEST_URI) {

        $_SERVER['REQUEST_URI'] = REQUEST_URI;

    }

    $protocol = 'http://';

    if (HTTPS) {

        $protocol = 'https://';
    }

    if (isset($_SERVER['REQUEST_URI'])) {

        if (stristr($_SERVER["REQUEST_URI"], "?")) {

            $requesturi = substr($_SERVER["REQUEST_URI"], 0, strpos($_SERVER["REQUEST_URI"], "?"));

            $location = "Location: {$protocol}{$_SERVER["HTTP_HOST"]}{$requesturi}";
        } else {


            $requesturi = $_SERVER["REQUEST_URI"];

            $location = "Location: {$protocol}{$_SERVER["HTTP_HOST"]}{$requesturi}";

        }

    } else {

        $location = "Location: {$protocol}{$_SERVER["HTTP_HOST"]}{$_SERVER['PHP_SELF']}";

    }

    if (!empty($query)) {

        $location .= "?{$query}";

    }

    header($location);

    exit;

}

Answer 1

You shouldn't put more than two lines in URL address. Check you URL.

Good URL - "http://mail.google.com"  - 1 line

Bad URL - "http://mail.              - 2 lines
            google.com/"