Fatal error: Call to undefined function filter_var()

• Berdych

• October 28, 2013 at 8:48 pm

What is mean this error when I click “Categories” (URL: /wp-admin/edit-tags.php?taxonomy=category):
“Fatal error: Call to undefined function filter_var() in /home/host/site.com/docs/wp-content/plugins/advanced-custom-fields/core/controllers/everything_fields.php on line 266”?

• Elliot

• October 29, 2013 at 5:41 pm

Hi @Berdych

the filter_var function is a core PHP function since 5.2

Perhaps you are running an older version of PHP?

I’ll take a look at the core of WP and see what I can use for better compatibility with old PHP versions.

For now, you can either modify the core code or upgrade your PHP version

Thanks
E

• Berdych

• October 29, 2013 at 8:00 pm

I don`t know, but server reply: “Apache/1.3.42 (Unix) PHP/5.3.13″… maybe the reason something else?

• Elliot

• October 30, 2013 at 4:23 pm

Hi @Berdych

Would you mind contacting your host and asking them why you are seeing this error?

Thanks
E