How to change the list of predefined values, set the default value and forbid to use custom values for PHP parameters in domain’s PHP Settings in Plesk

Question

How to change the list of predefined PHP values, set the default PHP value and forbid to use custom values for PHP parameters in domain’s PHP Settings?

Answer

These adjustments can be done in the Plesk configuration file panel.ini either via Plesk interface or directly on the server (Linux – /usr/local/psa/admin/conf/panel.ini, Windows Server – %plesk_dir%adminconfpanel.ini)

The list of all PHP parameters and detailed instructions are available on this documentation page:

• Customizing PHP Parameters | Plesk Obsidian documentation

Example

In this example, the values of the upload_max_filesize PHP parameter are customized this way:

• set 128M and 256M as predefined values in the drop-down list
• set 128M as the default size
• forbid user-defined values

1. Log in to Plesk.

2. Install the Panel.ini Editor extension at Extensions > Extensions Catalog.

3. Go to Extensions > My Extensions > Panel.ini Editor > Open and switch to the Editor tab.

4. Add the following lines to the field (if the editor field is not empty, scroll to the end):

   [php]
   
   ; Predefined values in the drop-down list
   settings.performance.upload_max_filesize.values[] = 128M
   settings.performance.upload_max_filesize.values[] = 256M
   
   ; Default value
   settings.performance.upload_max_filesize.default = 128M
   
   ; Forbid to specify custom values
   settings.performance.upload_max_filesize.custom = false

5. Click Save.