Title: Warning: Cannot modify header information – functions.php
Last modified: August 20, 2016

---

# Warning: Cannot modify header information – functions.php

 *  [viewmark](https://wordpress.org/support/users/viewmark/)
 * (@viewmark)
 * [13 years, 11 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-functionsphp/)
 * I’ve read so many threads on this topic, I know it’s an oldy but a goody…
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/content/65/4784765/html/wp-content/themes/wapp/functions.php:1) in /
   home/content/65/4784765/html/wp-includes/pluggable.php on line 866
 * I’ve checked for spaces in header.php, wp-config.php, functions.php, and pluggable.
   php…no spaces at the beginning or end…of the file.
 * I’ve tried deleting the lines in functions.php…makes no difference…
 * Help. [http://www.viewmarkcommunications.com](http://www.viewmarkcommunications.com)
 * My functions.php file:
 *     ```
       <?php
       // initialization
       include_once TEMPLATEPATH . '/functions/init.php';
       // utilities
       include_once TEMPLATEPATH . '/functions/utilities.php';
       // short codes
       include_once TEMPLATEPATH . '/functions/short_codes.php';
       // Advanced excerpt
       include_once TEMPLATEPATH . '/functions/excerpt.php';
       // view helpers
       include_once TEMPLATEPATH . '/functions/views.php';
       // comment functions
       include_once TEMPLATEPATH . '/functions/comments.php';
       // pagination
       include_once TEMPLATEPATH . '/functions/pagination.php';
       // widgets
       include_once TEMPLATEPATH . '/functions/widgets.php';
       // monkpanel
       include_once TEMPLATEPATH . '/functions/monkpanel/functions.php';
   
       function load_js_libraries() {
         wp_enqueue_script('jquery');
         wp_enqueue_script('libraries', get_template_directory_uri() . '/js/libraries.js', array('jquery'));
         wp_enqueue_script('wMain', get_template_directory_uri() . '/js/main.js', array('jquery'));
       }
   
       // TODO put this in an option
       function get_post_date_format() {
         return 'F jS, Y';
       }
   
       // TODO put this in an option
       function get_comment_date_format() {
         return 'M jS, Y';
       }
   
       function get_header_logo() {
         if (get_option('wapp_logo')) {
           $src = get_option('wapp_logo');
         } else {
           $src = get_template_directory_uri() . '/assets/logo.png';
         }
   
         $alt_title = get_bloginfo('name') . ' - Home';
         return "<img src='$src' alt='$alt_title' title='$alt_title' />";
       }
   
       function get_general_color_scheme() {
         if (get_option('wapp_general_color')) {
           return get_option('wapp_general_color');
         } else {
           return 'teal';
         }
       }
   
       function get_button_color_scheme() {
         if (get_option('wapp_button_color')) {
           return get_option('wapp_button_color');
         } else {
           return 'teal';
         }
       }
   
       function custom_css() {
         $monk_css = '';
   
         if(strlen(get_option('wapp_colors_a')) > 0)
           $monk_css .=  'a { color:' . get_option('wapp_colors_a') . ' }';
         if(strlen(get_option('wapp_colors_a_hover')) > 0)
           $monk_css .= 'a:hover{ color:' . get_option('wapp_colors_a_hover') . ' }';
         if(strlen(get_option('wapp_colors_a_dark')) > 0)
           $monk_css .= '.links_dark a, .link_dark, #header_nav > li > a[href]:hover, #header_nav li.active a.parent[href] { color:' . get_option('wapp_colors_a_dark') . ' }';
         if(strlen(get_option('wapp_colors_a_dark_hover')))
           $monk_css .=  '.links_dark a:hover, .link_dark:hover, #header_nav > li > a[href]:hover, #header_nav li.active a.parent[href]:hover { color:' . get_option('wapp_colors_a_dark_hover') . ' }';
         if(strlen(get_option('wapp_colors_navigation')) > 0)
           $monk_css .=  '#header_nav > li > a { color:' . get_option('wapp_colors_navigation') . ' }';
         if(strlen(get_option('wapp_colors_navigation_hover')) > 0)
           $monk_css .= '#header_nav > li > a:hover { color:' . get_option('wapp_colors_navigation_hover') . ' }';
         if(strlen(get_option('wapp_dropdown_a')) > 0)
           $monk_css .= '#header_nav .children li a { color:' . get_option('wapp_dropdown_a') . ' }';
         if(strlen(get_option('wapp_colors_dropdown_hover')) > 0)
           $monk_css .= '#header_nav .children li a:hover { color:' . get_option('wapp_colors_dropdown_hover') . ' }';
         if(strlen(get_option('wapp_colors_text')) > 0)
           $monk_css .=  'p, ul li, ol li { color:' . get_option('wapp_colors_text') . ' }';
         if(strlen(get_option('wapp_colors_text_alt')) > 0)
           $monk_css .= '#header_top h2, #footer p { color:' . get_option('wapp_colors_text_alt') . ' }';
         if(strlen(get_option('wapp_colors_introduction')) > 0)
           $monk_css .= '#header_intro p { color:' . get_option('wapp_colors_introduction') . ' }';
         if(strlen(get_option('waoo_colors_introduction_bold')) > 0)
           $monk_css .= '#header_intro strong { color:' . get_option('waoo_colors_introduction_bold') . ' }';
         if(strlen(get_option('wapp_colors_text_bold')) > 0)
           $monk_css .= 'strong { color:' . get_option('wapp_colors_text_bold') . ' }';
         if(strlen(get_option('wapp_custom_css')) > 0)
           $monk_css .= get_option('wapp_custom_css');
   
         echo strlen($monk_css) > 0 ? '<style type="text/css">' . addslashes($monk_css) . "</style>" : '';
       }
   
       function custom_js() {
         $js = stripslashes(get_option('wapp_custom_js'));
         echo strlen($js) > 0 ? '<script type="text/javascript">' . $js  . '</script>' : '';
       }
   
       function get_true_comment_count($type = 'comments') {
         if ($type == 'comments'):
           $typeSql = 'comment_type = ""';
         elseif ($type == 'pings'):
           $typeSql = 'comment_type != ""';
         elseif ($type == 'trackbacks'):
           $typeSql = 'comment_type = "trackback"';
         elseif ($type == 'pingbacks'):
           $typeSql = 'comment_type = "pingback"';
         else:
           return;
         endif;
   
         global $wpdb;
         $ID = get_the_ID();
   
         $result = $wpdb->get_var("SELECT COUNT(comment_ID) FROM $wpdb->comments WHERE $typeSql AND comment_approved='1' AND comment_post_ID = $ID");
         return $result;
       }
   
       function is_true_page($id) {
         global $wpdb;
         $count = $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->posts WHERE post_type = 'page' AND id = $id");
         return $count == 1;
       }
   
       function get_contact_url() {
         global $wpdb;
         $ID = $wpdb->get_var("SELECT post_id FROM $wpdb->postmeta WHERE meta_key = '_wp_page_template' AND meta_value = 'template-contact.php' LIMIT 1");
   
         return get_permalink($ID);
       }
   
       function get_products_url() {
         global $wpdb;
         $ID = $wpdb->get_var("SELECT post_id FROM $wpdb->postmeta WHERE meta_key = '_wp_page_template' AND meta_value in ('template-allproducts-1.php', 'template-allproducts-2.php', 'template-allproducts-3.php', 'template-allproducts-4.php') LIMIT 1");
   
         return get_permalink($ID);
       }
   
       function get_produtct_url($id) {
         return get_post_meta($id, 'product-url' , true);
       }
   
       function get_products_template() {
         global $wpdb;
         $template_name = $wpdb->get_var("SELECT meta_value, count(*) AS total FROM $wpdb->postmeta WHERE meta_key = '_wp_page_template' AND meta_value in ('template-allproducts-1.php', 'template-allproducts-2.php', 'template-allproducts-3.php', 'template-allproducts-4.php') ORDER BY total desc LIMIT 1");
   
         return intval(substr($template_name, 21, 1));
       }
       ?>
       ```
   

Viewing 9 replies - 1 through 9 (of 9 total)

 *  [deepbevel](https://wordpress.org/support/users/deepbevel/)
 * (@deepbevel)
 * [13 years, 11 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-functionsphp/#post-2851436)
 * You might try re uploading your default functions file,
    If you just want to 
   access your site you could rename your current theme file, if you have another
   to fall back on.
 * Then if all else fails try re uploading the whole wp folder EXCEPT WP-CONTENT
   of course.
 *  Thread Starter [viewmark](https://wordpress.org/support/users/viewmark/)
 * (@viewmark)
 * [13 years, 11 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-functionsphp/#post-2851437)
 * Thought it was solved…but not so fast….
 * Did suggestions 1 & 3…tried renaming my theme file…and when I got into WP…it 
   said it needed to do a database update…
 * When the update completed…everything seemed to work…I could access the site…but
   when I tried to edit a page…I got the same error.
 *  [deepbevel](https://wordpress.org/support/users/deepbevel/)
 * (@deepbevel)
 * [13 years, 11 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-functionsphp/#post-2851442)
 * you say you did 1 and 3, that would be re uploading your default functions.php
   file, and uploading your whole wp folder except wp-coontent. correct?
 *  [deepbevel](https://wordpress.org/support/users/deepbevel/)
 * (@deepbevel)
 * [13 years, 11 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-functionsphp/#post-2851443)
 * that would not include renaming anything. what ever you renamed, change it back.
 *  [deepbevel](https://wordpress.org/support/users/deepbevel/)
 * (@deepbevel)
 * [13 years, 11 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-functionsphp/#post-2851444)
 * if you did suggestion 2, then my bad, as I meant to say theme folder, not theme
   file. if this is what you did, what file did you rename? can you revert?
 *  Thread Starter [viewmark](https://wordpress.org/support/users/viewmark/)
 * (@viewmark)
 * [13 years, 11 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-functionsphp/#post-2851445)
 * I renamed the theme folder…which allowed me in as WP defaulted to use the twentyeleven
   theme. When I use this theme, I can edit pages.
 * I uploaded the default functions.php (from the original theme files). I also 
   uploaded wp-admin and wp-includes. But no luck…same problem…same error.
 *  [deepbevel](https://wordpress.org/support/users/deepbevel/)
 * (@deepbevel)
 * [13 years, 11 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-functionsphp/#post-2851449)
 * So when you use the original theme, you get the error when editing ? but otherwise
   not? What was going on when your original header info error happened?
 *  Thread Starter [viewmark](https://wordpress.org/support/users/viewmark/)
 * (@viewmark)
 * [13 years, 11 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-functionsphp/#post-2851453)
 * Solved…I loaded the original functions.php again…and it now seems to work…thanks…
 *  [deepbevel](https://wordpress.org/support/users/deepbevel/)
 * (@deepbevel)
 * [13 years, 11 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-functionsphp/#post-2851459)
 * nice, I was getting worried I made you rename the wrong thing. really glad you
   solved.

Viewing 9 replies - 1 through 9 (of 9 total)

The topic ‘Warning: Cannot modify header information – functions.php’ is closed 
to new replies.

## Tags

 * [Warning: Cannot modify header information](https://wordpress.org/support/topic-tag/warning-cannot-modify-header-information/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 9 replies
 * 2 participants
 * Last reply from: [deepbevel](https://wordpress.org/support/users/deepbevel/)
 * Last activity: [13 years, 11 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-functionsphp/#post-2851459)
 * Status: not resolved

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