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Fatal error, class 'Walker' not found

Hi,

I believe this fatal error has to do with the theme being used.

In my apache error log is the following:

[Thu Jul 04 13:18:17 2013] [error] [client 46.38.209.228] PHP Fatal error:  Class 'Walker' not found in /var/www/gemeentehollandskroon/public_html/wp-admin/includes/template.php on line 23, referer: http://hollands-kroon.nl/wp-admin/network/update.php?action=update-selected&plugins=jetpack%2Fjetpack.php%2Ctradetracker-store%2FTradetracker-Store.php%2Cwordpress-chat%2Fwordpress-chat.php

[Thu Jul 04 13:18:17 2013] [error] [client 46.38.209.228] PHP Fatal error:  Class 'Walker' not found in /var/www/gemeentehollandskroon/public_html/wp-admin/includes/template.php on line 23, referer: http://hollands-kroon.nl/wp-admin/network/update-core.php?action=do-plugin-upgrade

[Tue Jul 16 08:54:28 2013] [error] [client 46.38.209.228] PHP Fatal error:  Class 'Walker' not found in /var/www/gemeentehollandskroon/public_html/wp-admin/includes/template.php on line 23, referer: http://hollands-kroon.nl/wp-admin/network/update.php?action=update-selected&plugins=bulletproof-security%2Fbulletproof-security.php%2Cwordpress-chat%2Fwordpress-chat.php

[Tue Jul 16 08:54:33 2013] [error] [client 46.38.209.228] PHP Fatal error:  Class 'Walker' not found in /var/www/gemeentehollandskroon/public_html/wp-admin/includes/template.php on line 23, referer: http://hollands-kroon.nl/wp-admin/network/update.php?action=update-selected&plugins=bulletproof-security%2Fbulletproof-security.php%2Cwordpress-chat%2Fwordpress-chat.php

[Tue Jul 16 08:54:38 2013] [error] [client 46.38.209.228] PHP Fatal error:  Class 'Walker' not found in /var/www/gemeentehollandskroon/public_html/wp-admin/includes/template.php on line 23, referer: http://hollands-kroon.nl/wp-admin/network/update.php?action=update-selected&plugins=bulletproof-security%2Fbulletproof-security.php%2Cwordpress-chat%2Fwordpress-chat.php

[Mon Jul 22 10:11:04 2013] [error] [client 46.38.209.228] PHP Fatal error:  Class 'Walker' not found in /var/www/gemeentehollandskroon/public_html/wp-admin/includes/template.php on line 23, referer: http://hollands-kroon.nl/wp-admin/network/update.php?action=update-selected&plugins=wordpress-chat%2Fwordpress-chat.php

Can this fatal error be fixed?

Gr,

Age

Tue, 23 Jul 2013 7:39:26

PC
- WPMU DEV Initiate
- 6,409 pts: Hero points 23 pts: Rep. points LEVEL 1
Hiya,

Thanks for your post.

Let me look into this and get back to you asap.

Cheers

PC

Sales &Support
PC
- WPMU DEV Initiate
- 6,409 pts: Hero points 23 pts: Rep. points LEVEL 1
Hiya,

Thanks for standing by.

The above error seems to be coming from the 2 plugins installed on your site.

Jetpack and Bulletproof security

Can you disable the above 2 plugins and monitor the logs for a while and see if you still get errors ?

Please advise.

Cheers

PC

Sales &Support
jongag1
- The Crimson Coder
- 242 pts: Hero points 640 pts: Rep. points LEVEL 6
I’ll do that and inform you whether or not I’ll see the error again.

By the way, I’m on holiday for the next 3 weeks, so feedback can take a while…
jongag1
- The Crimson Coder
- 242 pts: Hero points 640 pts: Rep. points LEVEL 6
O, forgot to mention that Bulletproof is installed but it’s not activated.

jongag1

The Crimson Coder

242 pts: Hero points 640 pts: Rep. points LEVEL 6

Hi,

Got the error again. It only shows up when there is an update for a plugin. In this case for WordPress Chat:

[Thu Jul 25 09:33:41 2013] [error] [client 46.38.209.228] PHP Fatal error:  Class 'Walker' not found in /var/www/gemeentehollandskroon/public_html/wp-admin/includes/template.php on line 23, referer: http://hollands-kroon.nl/wp-admin/network/update.php?action=update-selected&plugins=wordpress-chat%2Fwordpress-chat.php

[Thu Jul 25 09:33:44 2013] [error] [client 46.38.209.228] PHP Fatal error:  Class 'Walker' not found in /var/www/gemeentehollandskroon/public_html/wp-admin/includes/template.php on line 23, referer: http://hollands-kroon.nl/wp-admin/network/update-core.php?action=do-plugin-upgrade

Greetings,

Age

PC
- WPMU DEV Initiate
- 6,409 pts: Hero points 23 pts: Rep. points LEVEL 1
Hello Age,

Are you using any Wootheme ?

The same kind issue (long time back) was discussed here : http://wordpress.org/support/topic/fatal-error-class-walker-not-found-1

Can you try the same suggestion as given by esmi ? (Kindly take a full backup before you try that)

Cheers

PC

Sales &Support

jongag1

The Crimson Coder

242 pts: Hero points 640 pts: Rep. points LEVEL 6

I’m back from holiday :slight_smile:

I’m not using a Wootheme, the theme I use is a WPMU theme: The Daily Theme

A week ago I still got some lines in the error log:

[Wed Aug 28 12:47:51 2013] [error] [client 46.38.209.228] PHP Fatal error:  Class 'Walker' not found in /var/www/gemeentehollandskroon/public_html/wp-admin/includes/template.php on line 23, referer: http://hollands-kroon.nl/wp-admin/network/update-core.php?action=do-plugin-upgrade

[Wed Aug 28 12:48:02 2013] [error] [client 46.38.209.228] PHP Fatal error:  Class 'Walker' not found in /var/www/gemeentehollandskroon/public_html/wp-admin/includes/template.php on line 23, referer: http://hollands-kroon.nl/wp-admin/network/update-core.php?action=do-plugin-upgrade

[Wed Aug 28 12:48:10 2013] [error] [client 46.38.209.228] PHP Fatal error:  Class 'Walker' not found in /var/www/gemeentehollandskroon/public_html/wp-admin/includes/template.php on line 23, referer: http://hollands-kroon.nl/wp-admin/network/update-core.php?action=do-plugin-upgrade

[Wed Aug 28 12:48:18 2013] [error] [client 46.38.209.228] PHP Fatal error:  Class 'Walker' not found in /var/www/gemeentehollandskroon/public_html/wp-admin/includes/template.php on line 23, referer: http://hollands-kroon.nl/wp-admin/network/update-core.php?action=do-plugin-upgrade

[Wed Aug 28 12:48:27 2013] [error] [client 46.38.209.228] PHP Fatal error:  Class 'Walker' not found in /var/www/gemeentehollandskroon/public_html/wp-admin/includes/template.php on line 23, referer: http://hollands-kroon.nl/wp-admin/network/update-core.php?action=do-plugin-upgrade

Greetings,

Age

PC
- WPMU DEV Initiate
- 6,409 pts: Hero points 23 pts: Rep. points LEVEL 1
Hey there,

Thanks for posting back. I hope you enjoyed your holiday.

Sorry for the confusion here. Walker is a WP function : http://codex.wordpress.org/Class_Reference/Walker

Walker is located in wp-includes/class-wp-walker.php

Can you FTP and check if its there ?

If not, then you could manually try re-uploading the wp-admin and wp-includes folders from a fresh download of WordPress 3.6 and see if that helps.

Please Please Please make sure you take proper backups before trying that out !

Cheers

PC

Sales &Support
jongag1
- The Crimson Coder
- 242 pts: Hero points 640 pts: Rep. points LEVEL 6
Hi,

The file class-wp-walker.php is located at wp-includes

Gr,

Age
PC
- WPMU DEV Initiate
- 6,409 pts: Hero points 23 pts: Rep. points LEVEL 1
Hey there,

sorry for the late response.

Can you kindly check the permissions for that file and wp-includes folder ?

I have also pinged @Jeffri to see if it’s the theme that might cause it.

Cheers

PC

Sales &Support
jongag1
- The Crimson Coder
- 242 pts: Hero points 640 pts: Rep. points LEVEL 6
wp-includes 755

class-wp-walker.php 644

Gr,

Age
Jeffri
- Front End Developer
- 58 pts: Hero points 209 pts: Rep. points LEVEL 4
Hi there,

It doesn’t appear to be an error caused by the theme, as it seems to happen only during the update. The theme shouldn’t add anything that interfere with that process.

Are you having this issue first hand? Are you able to replicate it?

Thank you.

Jeffri
jongag1
- The Crimson Coder
- 242 pts: Hero points 640 pts: Rep. points LEVEL 6
August 28th was the last time there was a mention about it in the log.

I’ve had several updates since then, so it look like the problem is gone.

I’ll check the log again after some weeks and let you know about it.

Greetings,

Age
PC
- WPMU DEV Initiate
- 6,409 pts: Hero points 23 pts: Rep. points LEVEL 1
Hey Age,

Thanks for posting back.

Kindly let us know if the problem reappears in the log and we will be around !

Thanks for chiming in Jeffri :slight_smile:

Cheers

PC

Sales &Support
jongag1
- The Crimson Coder
- 242 pts: Hero points 640 pts: Rep. points LEVEL 6
Just checked the log. It’s not in it anymore, so problem solved itself.

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