please help me in fixing Cannot modify header information error!

Hi,

I am trying to code options page for a new wordpress theme. I followed following tutorial to code this page

http://blog.themeforest.net/wordpress/create-an-options-page-for-your-wordpress-theme

now the problem is i am getting

Warning: Cannot modify header information - headers already sent by (output started at C:\xampplite\htdocs\wordpress\wp-content\themes\crunchtech\functions.php:195) in C:\xampplite\htdocs\wordpress\wp-content\themes\crunchtech\functions.php  on line 47

Code (markup):

here is the code

function mytheme_add_admin() {

    global $themename, $shortname, $options;

    if ( $_GET['page'] == basename(__FILE__) ) {
    
        if ( 'save' == $_REQUEST['action'] ) {

                foreach ($options as $value) {
                    update_option( $value['id'], $_REQUEST[ $value['id'] ] ); }

                foreach ($options as $value) {
                    if( isset( $_REQUEST[ $value['id'] ] ) ) { update_option( $value['id'], $_REQUEST[ $value['id'] ]  ); } else { delete_option( $value['id'] ); } }

                [B][COLOR="Red"]header("Location: themes.php?page=functions.php&saved=true");[/COLOR][/B]
                die;

        } else if( 'reset' == $_REQUEST['action'] ) {

            foreach ($options as $value) {
                delete_option( $value['id'] ); }

            [COLOR="Red"][B]header("Location: themes.php?page=functions.php&reset=true");[/B][/COLOR]
            die;

        }
    }

    add_theme_page($themename." Options", "".$themename." Options", 'edit_themes', basename(__FILE__), 'mytheme_admin');

}

Code (markup):

i have colored conflicting lines. Please help me in fixing this issue.
Thanks in advance.

 

The line you need to look at is:

C:\xampplite\htdocs\wordpress\wp-content\themes\crunchtech\functions.php on line 47

 

Just except some CSS formatting problem, I can see no PHP error on the linked page. Anyway, you need to check line 195 not 47. I believe either some output is printed on this line, or cookie is set. Suppose you're printing from your php file using print, echo or die function, or you're setting a cookie. It means, the server already started sending http response to the client. On the way, you cannot modify the http header and redirect the user to different page. This is how a web server and a PHP scripts works.

 

Just to confirm it's line 195 that the problem occurred on and not 47

 

You need to add this at the beginning of your PHP script:

ob_start( );

PHP:

And this at the end of your PHP script:

ob_end_flush( );

PHP:

 

finally figured out the problem. It was basically xampp which was causing this problem as when i uploaded files to web server code was executing fine without throwing any errors.
Thanks to all those who tried to help me

 

Never use XAMPP. I believe, some people here will protest my idea. But still I have to say, XAMPP is the worst Apache based web server I've ever used. Instead try Apache2Triad. It's not featureful, but it's perfect. I never became able to run hello_world.php file even, on this server.