Title: [Plugin: Sidebar Login] PHP Warning:  call_user_func_array()
Last modified: August 19, 2016

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# [Plugin: Sidebar Login] PHP Warning: call_user_func_array()

 *  [kfawcett](https://wordpress.org/support/users/kfawcett/)
 * (@kfawcett)
 * [15 years, 5 months ago](https://wordpress.org/support/topic/plugin-sidebar-login-php-warning-call_user_func_array/)
 * I’m not sure if this has always been happening on my server since installing 
   this plugin or whether it happened after an upgrade. I’m still in the stages 
   of building the site, but is there any way to correct the error below?
 * `[warn] mod_fcgid: stderr: PHP Warning: call_user_func_array() [<a href='function.
   call-user-func-array'>function.call-user-func-array</a>]: First argument is expected
   to be a valid callback, 'wp_sidebarlogin_css was given in /home/mysite/public_html/
   wp-includes/plugin.php on line 395`

The topic ‘[Plugin: Sidebar Login] PHP Warning: call_user_func_array()’ is closed
to new replies.

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 * 0 replies
 * 1 participant
 * Last reply from: [kfawcett](https://wordpress.org/support/users/kfawcett/)
 * Last activity: [15 years, 5 months ago](https://wordpress.org/support/topic/plugin-sidebar-login-php-warning-call_user_func_array/)
 * Status: not resolved