Support » Fixing WordPress » Website not working after 3.6 update

  • Chris Thomas


    I have just updated wordpress to 3.6 and have encountered the following error:

    Fatal error: Call to undefined function get_post_format_slugs() in /websites/123reg/LinuxPackage23/ox/an/ad/ on line 1262

    I have no idea what to do and I can’t even login to my wordpress dashbaord.


    Please help!

Viewing 7 replies - 1 through 7 (of 7 total)
  • saas



    Haven’t you heard about don’t do anything directly on live server (sites)? First test on test / staging server and if things are fine then make those changes to live site.

    Anyway as you already have done a blunder, I should guide you,

    1) WordPress 3.6 brought lots of core changes from which one of those was Post Format related,

    Post Formats UI is exiting core, will live as a plugin

    and also I tested it on my local server the function “get_post_format_slugs()” and its counterparts are gone from core.

    I tried to find an aiding plugin which supplements for core missing functionality but so far found none.

    So my suggestion to you, hire a professional (spend few bucks), and ask him to change your theme to the one which works with latest 3.6 (3.6 comes with a twenty thirty theme I think you will like it) so may be try that (and it will 100% work with wp 3.6)

    Moderator keesiemeijer



    See the troubleshooting 3.6 master list if any of your problems is listed there:

    Also go through the basic troubleshooting steps listed there:

    resetting the plugins folder by using FTP or whatever file management application your host provides. Sometimes, an apparently inactive plugin can still cause problems.

    – switching to the default theme by renaming your current theme’s folder in wp-content/themes using FTP or whatever file management application your host provides.

    – re-uploading all files & folders – except the wp-content folder from a fresh download of WordPress. by using FTP or whatever file management application your host provides. You may need to delete the wp-admin and wp-includes folders first on your server. Read theManual Update first.

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

    Chris Thomas


    Ok thank you for your advice. I have successfully restored the website having backed up from a couple of days ago.

    Now I have it back online, how do I upgrade WordPress without encountering the same problem again.

    Here are a list of my plugins (I have just updated contact form 7 and askimet).

    AddThis Social Bookmarking Widget
    Deactivate | Edit
    Help your visitor promote your site! The AddThis Social Bookmarking Widget allows any visitor to bookmark your site easily with many popular services. Sign up for an account to see how your visitors are sharing your content–which services they’re using for sharing, which content is shared the most, and more. It’s all free–even the pretty charts and graphs.

    Version 3.1 | By The AddThis Team | Visit plugin site
    Select Akismet
    Deactivate | Edit | Settings
    Used by millions, Akismet is quite possibly the best way in the world to protect your blog from comment and trackback spam. It keeps your site protected from spam even while you sleep. To get started: 1) Click the “Activate” link to the left of this description, 2) Sign up for an Akismet API key, and 3) Go to your Akismet configuration page, and save your API key.

    Version 2.5.9 | By Automattic | Visit plugin site
    Select All in one Favicon
    All in one Favicon
    Settings | Deactivate | Edit
    All in one Favicon management. Easily add a Favicon to your site and the WordPress admin pages. Complete with upload functionality. Supports all three Favicon types (ico,png,gif)

    Version 4.3 | By Arne Franken | Visit plugin site
    Select Analytics For WordPress
    Analytics For WordPress
    Deactivate | Edit
    Integrate google analytics in wordpress

    Version 3.0.1 | By tomatosoft | Visit plugin site
    Select Contact Form Plugin
    Contact Form Plugin
    Settings | Deactivate | Edit
    Plugin for Contact Form.

    Version 3.51 | By BestWebSoft | Visit plugin site | Settings | FAQ | Support
    Select Custom Meta Widget
    Custom Meta Widget
    Deactivate | Edit
    Clone of the standard Meta widget with options to hide thlogin, admin, entry and comment feed, and /custom links.

    Version 1.4.5 | By bitacre | Visit plugin site
    Select Drop Shadow Boxes
    Drop Shadow Boxes
    Deactivate | Edit
    Drop Shadow Boxes provides an easy way to highlight important content on your posts and pages. Includes a shortcode builder with a preview so you can test your box before adding it.

    Version 1.4.6 | By Steven Henty | Visit plugin site
    Select Mail Subscribe List
    Mail Subscribe List
    Deactivate | Edit
    Simple customisable plugin that displays a name/email form where visitors can submit their information, managable in the WordPress admin.

    Version 2.1.1 | By Richard Leishman t/a Webforward | Visit plugin site
    Select Maintenance Mode
    Maintenance Mode
    Settings | Deactivate | Edit
    Adds a splash page to your blog that lets visitors know your blog is down for maintenance. Logged in administrators get full access to the blog including the front-end. Navigate to Settings → Maintenance Mode to get started.

    Version 5.4 | By Michael Wöhrer | Visit plugin site
    Select NextGEN Gallery by Photocrati
    NextGEN Gallery by Photocrati
    Deactivate | Edit
    The most popular gallery plugin for WordPress and one of the most popular plugins of all time with over 7 million downloads.

    Version 2.0.0 | By Photocrati Media | Visit plugin site | Get help | Contribute
    Select NextGEN Scroll Gallery
    NextGEN Scroll Gallery
    Deactivate | Edit
    Awesome free JavaScript gallery. BMo-Design’s Mootools Javascript ScrollGallery as a Plugin for the WordPress NextGEN Gallery.

    Version 1.8.1 | By Benedikt Morschheuser | Visit plugin site | Settings |
    Select WordPress SEO
    WordPress SEO
    Settings | Deactivate | Edit
    The first true all-in-one SEO solution for WordPress, including on-page content analysis, XML sitemaps and much more.

    Version 1.4.13 | By Joost de Valk | Visit plugin site
    Select WP-Optimize
    Deactivate | Edit
    This plugin helps you to keep your database clean by removing post revisions and spams in a blaze. allows you to rename your admin name also. Additionally it allows you to run optimize command on your wordpress core tables (use with caution).

    Version 0.9.4 | By Ruhani Rabin | Visit plugin site
    Select WP Hide Post
    WP Hide Post
    Deactivate | Edit
    Enables a user to control the visibility of items on the blog by making posts and pages selectively hidden in different views throughout the blog, such as on the front page, category pages, search results, etc… The hidden item remains otherwise accessible directly using permalinks, and also visible to search engines as part of the sitemap (at least). This plugin enables new SEO possibilities for authors since it enables them to create new posts and pages without being forced to display them on their front and in feeds.

    Version 1.1.9 | By Robert Mahfoud | Visit plugin site
    Select WP Multibyte Patch
    WP Multibyte Patch
    Deactivate | Edit
    Multibyte functionality enhancement for the WordPress Japanese package.

    Version 1.6.4 | By Seisuke Kuraishi | Visit plugin site
    Select YouTube Subscribe widget
    YouTube Subscribe widget
    Deactivate | Edit

    Are any of these likely to cause me the same problem again?

    Please help, I don’t want to lose the site again having done well with SEO in the rankings.



    Hi @chris-thomas,
    I have installed all of the above plugins and tested with wordpress 3.6 and they work fine (no obvious issue).

    I believe issue lies in the theme you are using, is it custom coded or you are using free or premium purchased theme?

    Let me know what is the theme name and I will suggest you accordingly.

    Same problem for me on the latest update but because my friend and colleague who i do trust didt’t save the website back up file correctly because he had a problem trying to do this and now I cannot even get to admin login. H ow do i get around this? I use 123 reg as host and someone mentioned logging into that and playing around with it a bit and it sometimes clears the fault? I have seen that happen in the past but last year on another update.

    Any help appreciated because the site and data and all uploaded info and plugins are obviously still there but wordpress don’t seem bothered evne though myself and thousands of others have tried to speak to them via the telephone abou t this.

    It’s a clear issue they have i reckon as it happens alot…



    Forum Moderator

    wordpress don’t seem bothered evne though myself and thousands of others have tried to speak to them via the telephone abou t this.

    WordPress.ORG does not have phone support – the only support is here – and it’s 100% volunteer. If you’d like help troubleshooting your site, please start a new thread per the forum guidelines –

    Hi @shropshire,
    If you read my reply above I have clearly mentioned that issue doesn’t lies in wordpress (in this case v3.6), its your plugin or theme which is not updated to meet wordpress 3.6 requirements.

    And this issue happened because of your ignorance, if you would have read the pre-caution before updating the website to latest version 3.6 (take backup before proceeding to updating wordpress), you would not have been in this position. Also you would have to investigate whether your theme / plugins are compatible with v3.6 or not.

    And also if you want help, hire a professional to fix the conflicts between wordpress 3.6 and your theme / plugin, as the errors you are facing (most likely are the same as most of the other people have), after updating to wordpress 3.6 are relevant to code, and it can be few lines of code to hours of work, so don’t expect to get it resolved here.

    WordPress forums are for helping you with troubleshooting issues, fixing obvious bugs (wordpress, themes, plugins etc) etc….

    But they are not meant to replace your development work, for that you need to hire professional to quickly solve your issues.

    like @wpyogi said,

    WordPress.ORG does not have phone support – the only support is here – and it’s 100% volunteer

    and if you need help troubleshooting then you are welcome (but you will have to open a new thread for that).

Viewing 7 replies - 1 through 7 (of 7 total)
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