Title: PHP Fatal error: Call to undefined function is_network_admin() Last modified: August 19, 2016 --- # PHP Fatal error: Call to undefined function is_network_admin() * Resolved [bradgg](https://wordpress.org/support/users/bradgg/) * (@bradgg) * [15 years, 3 months ago](https://wordpress.org/support/topic/php-fatal-error-call-to-undefined-function-is_network_admin/) * PHP Fatal error: Call to undefined function is_network_admin() in /home/kriswb/ public_html/wp-admin/admin-header.php on line 16 * I am getting this error on my site, im running 3.0.5. * All of a sudden today when i log into wp-admin i get taken to a 500 internal server error page. * I haven’t changed any plugins, none have been updated, no new themes or alterations. Just new content as in posts and media. * Can anyone help me solve this? Viewing 10 replies - 1 through 10 (of 10 total) * Moderator [Samuel Wood (Otto)](https://wordpress.org/support/users/otto42/) * (@otto42) * WordPress.org Admin * [15 years, 3 months ago](https://wordpress.org/support/topic/php-fatal-error-call-to-undefined-function-is_network_admin/#post-1931903) * Your upgrade failed. Try upgrading manually. * [http://codex.wordpress.org/Updating_WordPress#Manual_Update](http://codex.wordpress.org/Updating_WordPress#Manual_Update) * Thread Starter [bradgg](https://wordpress.org/support/users/bradgg/) * (@bradgg) * [15 years, 3 months ago](https://wordpress.org/support/topic/php-fatal-error-call-to-undefined-function-is_network_admin/#post-1931916) * cheers Otto, did the job 🙂 * [pixelrage](https://wordpress.org/support/users/pixelrage/) * (@pixelrage) * [15 years, 3 months ago](https://wordpress.org/support/topic/php-fatal-error-call-to-undefined-function-is_network_admin/#post-1932370) * This is ridiculous. Why can’t the WordPress team fix this issue which has been happening for the past several versions?? Why even have an auto-update if it never works? * [276design](https://wordpress.org/support/users/276design/) * (@276design) * [15 years, 3 months ago](https://wordpress.org/support/topic/php-fatal-error-call-to-undefined-function-is_network_admin/#post-1932504) * Agree with pixelrage completely… the fact this is still an issue is crazy. * [bluewebkq](https://wordpress.org/support/users/bluewebkq/) * (@bluewebkq) * [15 years, 3 months ago](https://wordpress.org/support/topic/php-fatal-error-call-to-undefined-function-is_network_admin/#post-1932506) * Why i can not access link [http://codex.wordpress.org/Updating_WordPress#Manual_Update](http://codex.wordpress.org/Updating_WordPress#Manual_Update)? 🙁 * [meguchi](https://wordpress.org/support/users/meguchi/) * (@meguchi) * [15 years, 2 months ago](https://wordpress.org/support/topic/php-fatal-error-call-to-undefined-function-is_network_admin/#post-1932548) * the same thing also happened to me I kind new to wordpress I didnt check first when I upgraded, I only pressed “update” when theres the option on it, then the upgrade is failed now I can not log in at all * it always says Fatal error: Call to undefined function is_network_admin() in/ home/sepedaw1/public_html/wp-admin/admin-header.php on line 16 * eventhou I want to do the manual update I can not log in T__T * please someone tell me how to cope this problem thanks * [webactif](https://wordpress.org/support/users/webactif/) * (@webactif) * [15 years, 2 months ago](https://wordpress.org/support/topic/php-fatal-error-call-to-undefined-function-is_network_admin/#post-1932590) * A lot of issues regarding the auto update are to do with your hosts server settings… I had no end of trouble until they updated their settings and now all my sites auto update without issue. I’ll give them an email to see what they did and i’ll report back when i get a response … BBS * [lnsokol](https://wordpress.org/support/users/lnsokol/) * (@lnsokol) * [15 years ago](https://wordpress.org/support/topic/php-fatal-error-call-to-undefined-function-is_network_admin/#post-1932616) * I have an Atahualpa theme that I have tweaked just how I want it… on the 5th of this month I clicked Update WP on the dash and now I can’t log in to the admin at all. I don’t want to lose everything I have done on the site previously. Any ideas? I am hosted with godaddy. TIA lnsokol * [Juuth](https://wordpress.org/support/users/juuth/) * (@juuth) * [14 years, 9 months ago](https://wordpress.org/support/topic/php-fatal-error-call-to-undefined-function-is_network_admin/#post-1932641) * Updating manually as mentioned above by Otto did the job for me :). Thanks! * [pr-azubi](https://wordpress.org/support/users/pr-azubi/) * (@pr-azubi) * [14 years, 9 months ago](https://wordpress.org/support/topic/php-fatal-error-call-to-undefined-function-is_network_admin/#post-1932642) * Worked perfectly – Thanks alot! Viewing 10 replies - 1 through 10 (of 10 total) The topic ‘PHP Fatal error: Call to undefined function is_network_admin()’ is closed to new replies. * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/) * 10 replies * 10 participants * Last reply from: [pr-azubi](https://wordpress.org/support/users/pr-azubi/) * Last activity: [14 years, 9 months ago](https://wordpress.org/support/topic/php-fatal-error-call-to-undefined-function-is_network_admin/#post-1932642) * Status: resolved ## Topics ### Topics with no replies ### Non-support topics ### Resolved topics ### Unresolved topics ### All topics