Title: Fatal Errors on theme files Last modified: August 30, 2016 --- # Fatal Errors on theme files * Resolved [123458emre](https://wordpress.org/support/users/123458emre/) * (@123458emre) * [10 years, 7 months ago](https://wordpress.org/support/topic/fatal-errors-on-theme-files/) * Hi all! * I have a website that runs steady. There is no problem but on theme files. For example, when go to ‘site.com/wp-content/themes/theme1’ (index.php) or another theme files it gives an error like this: “Fatal error: Call to undefined function….” And I delete the “undefined” function. It still continues. I delete the other“ undefined” functions until there is no php code in file. It’s valid for all themes, and theme files. Although these fatal errors seems, the website be still working. I tried to remove and to reinstall the plugins. However, website is still in the current situation. * Thanks Viewing 8 replies - 1 through 8 (of 8 total) * Thread Starter [123458emre](https://wordpress.org/support/users/123458emre/) * (@123458emre) * [10 years, 7 months ago](https://wordpress.org/support/topic/fatal-errors-on-theme-files/#post-6616965) * In addition, I use these plugins: * add-to-any akismet all-in-one-seo-pack all-in-one-wp-security-and-firewall facebook- like-box-widget social-networks-auto-poster-facebook-twitter-g (not active) user- role-editor wp-pagenavi wp-super-cache yet-another-related-posts-plugin * [Bill](https://wordpress.org/support/users/chubbycrow/) * (@chubbycrow) * [10 years, 7 months ago](https://wordpress.org/support/topic/fatal-errors-on-theme-files/#post-6616997) * It would help if you posted the entire error message. * Upload a fresh copy of your theme, and the Twenty Fifteen theme (or another default WP theme of your choice. Disable all plugins, clear your browser cache, and see what you get. First try the 2015 theme, and if it’s ok, try with your active ( fresh) theme. * Thread Starter [123458emre](https://wordpress.org/support/users/123458emre/) * (@123458emre) * [10 years, 7 months ago](https://wordpress.org/support/topic/fatal-errors-on-theme-files/#post-6617129) * Still gives errors for all themes: * Fatal error: Call to undefined function get_header() in C:\xampp\htdocs\www\wp- content\themes\twentyfifteen\index.php on line 17 * Fatal error: Call to undefined function has_nav_menu() in C:\xampp\htdocs\www\ wp-content\themes\twentyfifteen\sidebar.php on line 10 * Fatal error: Call to undefined function language_attributes() in C:\xampp\htdocs\ www\wp-content\themes\twentyfifteen\header.php on line 12 * But some theme files aren’t like above. For example twentyfifteen/content.php has no error. * [Bill](https://wordpress.org/support/users/chubbycrow/) * (@chubbycrow) * [10 years, 7 months ago](https://wordpress.org/support/topic/fatal-errors-on-theme-files/#post-6617159) * > I have a website that runs steady. There is no problem but on theme files. * If it runs properly, what makes you say there is a problem with the theme files? * > when go to ‘site.com/wp-content/themes/theme1’ (index.php) or another theme > files it gives an error * I’m not sure why you’re trying to navigate to theme files as if they were web pages. Or maybe you didn’t explain what you’re doing that gives these errors. * index.php at your site’s WP root should bring you to your site. If you’re trying to modify your theme files, you should do that with a text editor or in your admin edit panels (and _preferably_ only in [child themes](http://codex.wordpress.org/Child_Themes)). Changes you make to default or downloaded themes will be lost when they receive updates. Maybe I’m missing something? * Thread Starter [123458emre](https://wordpress.org/support/users/123458emre/) * (@123458emre) * [10 years, 7 months ago](https://wordpress.org/support/topic/fatal-errors-on-theme-files/#post-6617174) * thanks for your patient. * I mean, is it normal? Shouldn’t I find strange when I navigate to theme files and see these errors? Even the functions run * [Bill](https://wordpress.org/support/users/chubbycrow/) * (@chubbycrow) * [10 years, 7 months ago](https://wordpress.org/support/topic/fatal-errors-on-theme-files/#post-6617180) * The contents of a theme folder are, for example: functions, css styles, templates for different types of page layouts (like single posts, archives, search, etc,), and many are just _parts_ of a page (like footer, header, sidebar, etc). Most of those don’t contain everything a page needs to display properly, so they can’t. Functions throw errors if everything doesn’t come in just the right order. WordPress knows how to put it all together, so you can’t just navigate to a file with a web browser out of order and expect it to work. * As I mentioned above, if you want to see what’s in those files and folders, use your operating system’s directory browser, a [text editor](https://codex.wordpress.org/Editing_Files#Text_Editors), or [WP admin’s edit panel](https://codex.wordpress.org/Administration_Screens#Theme_Editor). And again, if you make changes, only do it on a child theme (as above). Does that help? * Thread Starter [123458emre](https://wordpress.org/support/users/123458emre/) * (@123458emre) * [10 years, 7 months ago](https://wordpress.org/support/topic/fatal-errors-on-theme-files/#post-6617192) * Thanks * Thread Starter [123458emre](https://wordpress.org/support/users/123458emre/) * (@123458emre) * [10 years, 7 months ago](https://wordpress.org/support/topic/fatal-errors-on-theme-files/#post-6617193) * . Viewing 8 replies - 1 through 8 (of 8 total) The topic ‘Fatal Errors on theme files’ is closed to new replies. ## Tags * [fatal](https://wordpress.org/support/topic-tag/fatal/) * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/) * 8 replies * 2 participants * Last reply from: [123458emre](https://wordpress.org/support/users/123458emre/) * Last activity: [10 years, 7 months ago](https://wordpress.org/support/topic/fatal-errors-on-theme-files/#post-6617193) * Status: resolved ## Topics ### Topics with no replies ### Non-support topics ### Resolved topics ### Unresolved topics ### All topics