Title: Fatal error undefined function is_network_admin() Last modified: August 19, 2016 --- # Fatal error undefined function is_network_admin() * [Dab12](https://wordpress.org/support/users/dab12/) * (@dab12) * [15 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-undefined-function-is_network_admin/) * When I try to enter in admin I`ve got this pb since I tried to update to WP 3.1: Fatal error: Call to undefined function is_network_admin() in /home/putinaem/ public_html/wp-admin/admin-header.php on line 16. * How could I fix it please? * I`m not sure if I use 3.01 or 3. Now I can`t see. * Thank you. db Viewing 15 replies - 1 through 15 (of 16 total) 1 [2](https://wordpress.org/support/topic/fatal-error-undefined-function-is_network_admin/page/2/?output_format=md) [→](https://wordpress.org/support/topic/fatal-error-undefined-function-is_network_admin/page/2/?output_format=md) * [jon](https://wordpress.org/support/users/adiant/) * (@adiant) * [15 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-undefined-function-is_network_admin/#post-1936978) * Please see this post: [http://wordpress.org/support/topic/php-fatal-error-call-to-undefined-function-is_network_admin?replies=3](http://wordpress.org/support/topic/php-fatal-error-call-to-undefined-function-is_network_admin?replies=3) * Thread Starter [Dab12](https://wordpress.org/support/users/dab12/) * (@dab12) * [15 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-undefined-function-is_network_admin/#post-1937071) * Ok. thanks I try to update manually, but I can`t deactivate my plugins as I can`t enter in Admin. It`s ok to follow the next steps without this operation? * [jon](https://wordpress.org/support/users/adiant/) * (@adiant) * [15 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-undefined-function-is_network_admin/#post-1937078) * Yes, you can skip disabling plug-ins. But keep it in mind, just in case things still don’t work. * I’m not sure if there is a (easy) way to disable plug-ins without having access to the Admin panels. We can explore that later, if you run into trouble. * [bsaitz](https://wordpress.org/support/users/bsaitz/) * (@bsaitz) * [15 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-undefined-function-is_network_admin/#post-1937295) * i’ve done a manual upgrade (like 4x now) and i cant get rid of that error. i uploaded all the root files, deleted admin & includes and re-uploaded them, but not sure what else to do. * any other ideas? * [jon](https://wordpress.org/support/users/adiant/) * (@adiant) * [15 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-undefined-function-is_network_admin/#post-1937296) * I realize you just may not have mentioned it, but reading [http://codex.wordpress.org/Updating_WordPress#Manual_Update](http://codex.wordpress.org/Updating_WordPress#Manual_Update) I don’t see you mentioning this step: * > Upload the individual files from the new wp-content folder to your existing > wp-content folder, overwriting existing files. Do NOT delete your existing > wp-content folder. Do NOT delete any files or folders in your existing wp-content > directory (except for the one being overwritten by new files). > Be careful when you come to copying the wp-content directory. You should make > sure that you only copy the files from inside this directory, rather than replacing > your entire wp-content directory. This is where your themes and plugins live, > so you will want to keep them. If you have customized the default or classic > themes without renaming them, make sure not to overwrite those files, otherwise > you will lose your changes. (Though you might want to compare them for new > features or fixes..) > Lastly you should take a look at the wp-config-sample.php file, to see if any > new settings have been introduced that you might want to add to your own wp- > config.php. * [jon](https://wordpress.org/support/users/adiant/) * (@adiant) * [15 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-undefined-function-is_network_admin/#post-1937297) * Ah, I found the documentation I was looking for on deactivating plugins WITHOUT accessing the Admin panels: [http://codex.wordpress.org/FAQ_Troubleshooting#How_to_deactivate_all_plugins_when_not_able_to_access_the_administrative_menus.3F](http://codex.wordpress.org/FAQ_Troubleshooting#How_to_deactivate_all_plugins_when_not_able_to_access_the_administrative_menus.3F) * [bsaitz](https://wordpress.org/support/users/bsaitz/) * (@bsaitz) * [15 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-undefined-function-is_network_admin/#post-1937298) * thanks.. i checked and had done wp-content, but did it again anyway. i also dont have a wp-content widgets or cache dir, so that was easy. * i also just checked the config vs sample, and they look pretty similar. * appreciate the help anyway – any other ideas? * [bsaitz](https://wordpress.org/support/users/bsaitz/) * (@bsaitz) * [15 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-undefined-function-is_network_admin/#post-1937299) * i am also seeing this in my error log.. hmmm * [26-Feb-2011 11:05:25] PHP Fatal error: require() [[function.require](https://wordpress.org/support/topic/fatal-error-undefined-function-is_network_admin/function.require?output_format=md)]: Failed opening required ‘/home/BLOG/public_html/wp-includes/load.php’ (include_path =’.:/usr/lib/php:/usr/local/lib/php’) in /home/BLOG/public_html/wp-settings.php on line 19 * [jon](https://wordpress.org/support/users/adiant/) * (@adiant) * [15 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-undefined-function-is_network_admin/#post-1937300) * Have you re-downloaded WordPress, just in case the original download was corrupt? * As for the error, check in /wp-includes/ on your web site and see if there is a load.php file. There should be. Again, corrupt download sounds likely. * [bsaitz](https://wordpress.org/support/users/bsaitz/) * (@bsaitz) * [15 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-undefined-function-is_network_admin/#post-1937304) * thanks [@adiant](https://wordpress.org/support/users/adiant/).. but i have 2 blogs and used the same d/l’ed files to upgrade the other one (manually), and that one was fine. so now i’m really perplexed. * [jon](https://wordpress.org/support/users/adiant/) * (@adiant) * [15 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-undefined-function-is_network_admin/#post-1937306) * Take a look at the actual download you have on your hard drive. Does /wp-include/ have load.php in it? * [bsaitz](https://wordpress.org/support/users/bsaitz/) * (@bsaitz) * [15 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-undefined-function-is_network_admin/#post-1937310) * i got it.. i think a few files were missing. all good! thx! * [kings road](https://wordpress.org/support/users/kings-road/) * (@kings-road) * [15 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-undefined-function-is_network_admin/#post-1937386) * Having similar problems and can’t understand it – any ideas? * Updated to 3.1 and getting this: * Fatal error: Call to undefined function is_network_admin() in /home/BLOG/wordpress/ wp-admin/admin-header.php on line 16 Notice: class-snoopy.php is deprecated since version 3.0! Use wp-includes/http.php instead. in /home/BLOG/wordpress/wp-includes/ functions.php on line 3276 * [euvidente](https://wordpress.org/support/users/euvidente/) * (@euvidente) * [15 years ago](https://wordpress.org/support/topic/fatal-error-undefined-function-is_network_admin/#post-1937494) * For those are still getting stuck on this error I just writed a post on how to fix it. * [http://euvidente.blogspot.com/2011/03/fatal-error-undefined-function.html](http://euvidente.blogspot.com/2011/03/fatal-error-undefined-function.html) * [rolandihms](https://wordpress.org/support/users/rolandihms/) * (@rolandihms) * [15 years ago](https://wordpress.org/support/topic/fatal-error-undefined-function-is_network_admin/#post-1937503) * Struggled with this for a while now! tried editing the functions themselves etc. The solution thoght was simply to upload a fresh copy of the WP core!!! * I love the robustness of the best CMS around!! Go WP Viewing 15 replies - 1 through 15 (of 16 total) 1 [2](https://wordpress.org/support/topic/fatal-error-undefined-function-is_network_admin/page/2/?output_format=md) [→](https://wordpress.org/support/topic/fatal-error-undefined-function-is_network_admin/page/2/?output_format=md) The topic ‘Fatal error undefined function is_network_admin()’ is closed to new replies. ## Tags * [fatal error](https://wordpress.org/support/topic-tag/fatal-error/) * [WordPress update](https://wordpress.org/support/topic-tag/wordpress-update/) * In: [Installing WordPress](https://wordpress.org/support/forum/installation/) * 16 replies * 7 participants * Last reply from: [marsha3236](https://wordpress.org/support/users/marsha3236/) * Last activity: [15 years ago](https://wordpress.org/support/topic/fatal-error-undefined-function-is_network_admin/page/2/#post-1937506) * Status: not resolved ## Topics ### Topics with no replies ### Non-support topics ### Resolved topics ### Unresolved topics ### All topics