Unable to override the default value of "disable_functions" via global php.ini

Symptoms

• The directive disable_functions cannot be changed using the article How to disable PHP functions globally?

• After changing the directive disable_functions in Plesk in Domains > example.com > PHP Settings, domain's phpinfo still shows the old value.

• The configuration file /var/www/vhosts/system/example.com/etc/php.ini contains the default value:

  # grep "disable_functions" /var/www/vhosts/system/example.com/etc/php.ini
  disable_functions = "opcache_get_status"

Cause

This is Plesk bug PPPM-9216, which is planned to be fixed in one of the future product updates.

Resolution

Subscribe to this article to be notified when the bug would be fixed.

Until that, use the following workaround:

1. Log into Plesk.

2. Install the extension Panel.ini Editor.

3. Go to Extensions > My Extensions > Panel.ini Editor > Open > Editor.

4. Put the desired values for the parameter disable_functions as follows and click Save:

   CONFIG_TEXT: [php]
   settings.performance.disable_functions.values[]=base64_decode
   settings.performance.disable_functions.default=base64_decode

5. Go to Service Plans > plan_name > PHP Settings.

6. Check that the parameter disable_functions has the correct value.

7. Click Update & Sync.

   Warning: So the value of the parameter disable_functions is propagated to the domain's PHP Settings, the Hosting performance settings management permission must be disabled in Service Plans > plan_name > Permissions.

8. Repeat the steps 5-7 for each service plan.

Additional information

Plesk Onyx Administrator's Guide - Customizing PHP Parameters