Issue
PHP Error Log contains errors similar to:
PHP Warning: Unknown: Input variables exceeded 1000. To increase the limit change max_input_vars in php.ini. in Unknown on line 0
And/or the website has some of the following symptoms:
- Users cannot use drag and drop or the weights feature on certain menu lists.
- The Permissions page cannot be edited or updated.
Resolution
For sites on Acquia Cloud Professional, go to "Prod >> Configure" and increase the setting for Prod environment. See https://docs.acquia.com/acquia-cloud/manage/php/
For sites on Acquia Cloud Enterprise, Acquia Cloud Site Factory, or if needing a setting higher than 2500, please file a support ticket.
Cause
Website was exceeding max_input_variables default setting of 1000 on one or more forms. This configuration should generally not be set to over 5000 since this intruduces security vulnerabilities. Instead, please reduce form complexity.