Temporarily switch back to the default WordPress theme and see if the error goes away. If not, temporarily disable plugins and see if it goes away. If it does, re-enable plugins one by one until you find the issue.
[edit] you may need to use your ftp client if you can’t get into the dashboard: Info on troubleshooting themes and plugins can be found here: Login Trouble
If a plugin or a theme is causing the issue, you should first check with the developer to see if there is an updated version available.
You can/should also turn off the php error reporting feature (or debugging) for your live site when you are done. Your hosts FAQ should have some documentation to help you with that if you need it.
Some additional info about WordPress debug features and error reporting in general can be found here; Debugging in WordPress
Hi Clayton,
Thanks for the quick reply. i have renamed both the themes and the plugins on ftp but no joy. does the dubug error message point to a plugin/theme issue?
thanks
mark
i have renamed both the themes and the plugins on ftp but no joy. does the dubug error message point to a plugin/theme issue?
It sure seems like either the current theme or an activated plugin is probably causing the notice.
Try temporarily renaming just the /designfolio-pro theme directory as well as the entire /plugins directory and then revisit your site using yoursite.com/wp-login.php to see if that makes any difference in the error or the navigation.
I have just tried that and now have the following error
Fatal error: Call to undefined function wp_json_encode() in /websites/123reg/LinuxPackage23/ih/at/ew/ihateworkinginretail.com/public_html/wp-admin/includes/misc.php on line 668
thanks
mark
I’m not seeing any errors in the front end or the login page anymore. Is that wp_json_encode error just visible in the backend?
i have just switched it back.. as after renaming the designfolio plugin and plugin folder my front end turned white and delivered that message
thanks for your help so far clayton. this is driving me crazy!!! 🙂
I do remember reading some issues with that particular error recently. It looks like there might be some similar discussions in the forums. Link goes to Google, but the results are all from forum discussions. Maybe something will spark an idea.
site:wordpress.org/support “Fatal error: Call to undefined function wp_json_encode() in” line 668
thanks for that clayton, i have just seen the discussions that say i need to re-install wordpress manually(which i have done) and replace everything in the root directory except the wp config and wp config directory from my root directory.
as i have only used filezila once this sounds a bit daunting. is there an idiots guide on how to do this?
I Dont want to get it wrong and screw up my site
thanks
There is a guide for updating/upgrading here: Updating WordPress. The Manual Update process will probably be what you’re looking for.
I know you are already aware of this, but it’s worth repeating – it’s important to pay particular attention to the part about not deleting your wp-config.php file and your /wp-content directory.
It’s also best practice to always make sure you have a complete file and database backup before any major or manual procedures. Some great info on backups can be found here: WordPress Backups
