Unable to change the PHP settings when using LiteSpeed Web Server with Plesk

Symptoms

• LiteSpeed extension is installed, Plesk is running with active LiteSpeed Web Server

• PHP-FPM is set at Domains > example.com > PHP Settings

• Changes in PHP Settings are not reflected on the page Domains > example.com > PHP Settings > View the phpinfo() (other parameters are shown)

• Website with Magento CMS shows the following message while the proper or later PHP version is set in Plesk at Domains > example.com > PHP Settings:

  Magento supports PHP 7.0.2, 7.0.4, and 7.0.6 or later. Please read Magento System Requirements

• The following record might be shown in the /var/www/vhosts/system/example.com/logs/error_log file:

  MIME type [application/x-httpd-php] for suffix '.php' does not allow serving as static file, access denied!

Cause

LiteSpeed Web Server does not support PHP-FPM configuration in the Plesk interface.

Resolution

Since LiteSpeed extension does not support FPM try the following solution:

1. Log into Plesk

2. Go to Domains > example.com > PHP Settings

3. Switch to switch PHP to FastCGI application:

   

Additional information

Refer to LiteSpeed Official documentation for more details on PHP support: Using PHP with Plesk and LSWS.

The extension is developed by LiteSpeed Technologies, for assistance with the configuration of LiteSpeed + PHP contact the LiteSpeed Support Team.

LiteSpeeed documentation: Plesk Mismatched PHP Configuration