Warning function array – advice please!

  • thehels

    (@thehels)


    10 years, 8 months ago

    Hello, I tried auto-updating wordpress on my site to 3.6 last night and it took a very long time and didn’t complete. It prompted me to keep trying the auto-update, so I tried a few more times to update, then resorted to a manual update when that didn’t work. I followed the instructions to the letter here, but I now have the following in the header of every page on my site:

    Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘_show_post_preview’ was given in /mydomainname.co.uk/public_html/wp-includes/plugin.php on line 406

    When I try to access the wp-admin page I just get a screen with the same text above, followed by

    Warning: Cannot modify header information – headers already sent by (output started at /mydomainname.co.uk/public_html/wp-includes/plugin.php:406) in /mydomainname.co.uk/public_html/wp-includes/pluggable.php on line 875

    As I can’t get into the wp-admin panel to do anything (i.e. try it with a different theme), I have tried disabling the plugins one by one by removing them via FTP (I first tried renaming the plugins folder to plugins.hold – but this made no difference). I have also tried replacing the wordpress files again (as per the upgrade).

    I have read a number of other posts on this issue but I don’t think any of them apply to me as I don’t have any of the plugins mentioned.

    I am not at all experienced in php and am at a loss here as to what to do. Any help would be much appreciated!

    Many thanks.

Viewing 3 replies - 1 through 3 (of 3 total)
  • esmi

    (@esmi)

    10 years, 8 months ago

    Try:
    – switching to the default theme by renaming your current theme’s folder inside wp-content/themes and adding “-old” to the end of the folder name using FTP or whatever file management application your host provides.

    – resetting the plugins folder by FTP or phpMyAdmin.

    – re-uploading all files & folders – except the wp-content folder – from a fresh download of WordPress. Make sure that you delete the old copies of files & folder before uploading the new ones.

    – running the upgrade manually via wp-admin/upgrade.php

    kulwant2sin

    (@kulwant2sin)

    10 years, 8 months ago

    Replace the functions.php file of your theme by downloading original file for that theme . Or re install your theme if you have child theme .

    Thread Starter thehels

    (@thehels)

    10 years, 8 months ago

    Thank you esmi and kulwant2sin for your speedy replies. I tried all the suggestions you gave – the one that finally worked was reuploading everything from a fresh wp download. I’m so grateful that it’s all working now – thanks for your help.

    Now it’s working properly again I thought it was time to do a bit of housekeeping, so I decided to update all my plugins/themes as I think this is where my problems began. I updated them one by one but the process was incredibly slow – could this be linked to the same issue?

    Thanks again for your help.

Viewing 3 replies - 1 through 3 (of 3 total)
  • The topic ‘Warning function array – advice please!’ is closed to new replies.