Title: Site Background Slider Plugin Modify Header Warning
Last modified: August 20, 2016

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# Site Background Slider Plugin Modify Header Warning

 *  [comfyred](https://wordpress.org/support/users/comfyred/)
 * (@comfyred)
 * [14 years ago](https://wordpress.org/support/topic/site-background-slider-plugin-modify-header-warning/)
 * Site Background Slider seems like a great plugin, but I keep getting the following
   errors after installing/enabling:
 * Notice: Undefined index: page in bwps/wp-content/plugins/site-background-slider/
   admin.php on line 3
 * Notice: Undefined index: page in bwps/wp-content/plugins/site-background-slider/
   admin.php on line 46
 * Warning: Cannot modify header information – headers already sent by (output started
   at /bwps/wp-content/plugins/site-background-slider/admin.php:3) in bwps/wp-includes/
   functions.php on line 861
 * Warning: Cannot modify header information – headers already sent by (output started
   at bwps/wp-content/plugins/site-background-slider/admin.php:3) in bwps/wp-includes/
   functions.php on line 862
 * I’ve tried reinstalling, etc.
 * I’m not sure that just editing the mentioned files is the best fix for this, 
   if what is really required is a plugin update…?
 * The plugin itself works fine on the site, it just makes updating my site very
   tedious. Lots of white screens and errors whenever I try to change something.

Viewing 5 replies - 1 through 5 (of 5 total)

 *  [Press Pixels](https://wordpress.org/support/users/presspixels/)
 * (@presspixels)
 * [14 years ago](https://wordpress.org/support/topic/site-background-slider-plugin-modify-header-warning/#post-2718537)
 * Those errors can be a multitude of things – I just checked and with the default
   themes for WordPress there are no errors, which points to conflicts with other
   plugins or your theme.
 * This plugin was updated about 2 weeks ago… and those referred lines are the CSS
   inclusion file and the insert into menu file (menu item for admin)
 * One thing I did notice after doing a bit of research, if you open the admin.php
   page (shown in the error) and add `?>` at the end of that file, save and reload–
   let me know if that helps?
 *  Thread Starter [comfyred](https://wordpress.org/support/users/comfyred/)
 * (@comfyred)
 * [14 years ago](https://wordpress.org/support/topic/site-background-slider-plugin-modify-header-warning/#post-2718599)
 * I’ve just re-installed a fresh wordpress, and updated to 3.3.2.
 * Then installed site-background-slider, activated it.
 * [turned debug to true]
 * and received the following errors:
 * Notice: Undefined index: page in trez/wp-content/plugins/site-background-slider/
   admin.php on line 3
 * Notice: Undefined index: page in trez/wp-content/plugins/site-background-slider/
   admin.php on line 46
 * Warning: Cannot modify header information – headers already sent by (output started
   at trez/wp-content/plugins/site-background-slider/admin.php:3) in /home/cupsofte/
   public_html/foundry/trez/wp-includes/functions.php on line 861
 * Warning: Cannot modify header information – headers already sent by (output started
   at trez/wp-content/plugins/site-background-slider/admin.php:3) in /home/cupsofte/
   public_html/foundry/trez/wp-includes/functions.php on line 862
 * Also this when I activate it: “The plugin generated 341 characters of unexpected
   output during activation. If you notice “headers already sent” messages, problems
   with syndication feeds or other issues, try deactivating or removing this plugin.”
 * I tried various white space deleting, and adding and removing the closing PHP
   tag ?> to no avail. ([http://codex.wordpress.org/FAQ_Troubleshooting#How_do_I_solve_the_Headers_already_sent_warning_problem.3F](http://codex.wordpress.org/FAQ_Troubleshooting#How_do_I_solve_the_Headers_already_sent_warning_problem.3F))
 * So I guess that leaves me with a server error or something?
 *  [Press Pixels](https://wordpress.org/support/users/presspixels/)
 * (@presspixels)
 * [14 years ago](https://wordpress.org/support/topic/site-background-slider-plugin-modify-header-warning/#post-2718601)
 * Yes, I dont understand why – not happening with me here… will investigate further
   and let you know (via here) if I find anything. Seems to be a common error on
   the WordPress forums.
 *  Thread Starter [comfyred](https://wordpress.org/support/users/comfyred/)
 * (@comfyred)
 * [14 years ago](https://wordpress.org/support/topic/site-background-slider-plugin-modify-header-warning/#post-2718604)
 * Still love the plugin 🙂
 *  [skashi](https://wordpress.org/support/users/skashi/)
 * (@skashi)
 * [14 years ago](https://wordpress.org/support/topic/site-background-slider-plugin-modify-header-warning/#post-2718718)
 * The Notice messages you are getting is because your website’s PHP debug level
   is too high. These should be turned off in a production website. The warnings
   you are getting is a result of the Notice messages showing.
 * Speak to your hosting provider to turn Notice messages off. That should do the
   trick.

Viewing 5 replies - 1 through 5 (of 5 total)

The topic ‘Site Background Slider Plugin Modify Header Warning’ is closed to new
replies.

 * 5 replies
 * 3 participants
 * Last reply from: [skashi](https://wordpress.org/support/users/skashi/)
 * Last activity: [14 years ago](https://wordpress.org/support/topic/site-background-slider-plugin-modify-header-warning/#post-2718718)
 * Status: not resolved

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