How to change the PHP version for webmail on a Plesk for Linux server

Question

How to change the PHP version for webmail on Plesk for Linux?

Answer

1. Connect to a Plesk server via SSH.

2. Create a directory for custom configuration templates:

   # mkdir -p /usr/local/psa/admin/conf/templates/custom/webmail

3. Copy the original files roundcube.php and horde.php to the created directory:

   • Roundcube:

     # cp /usr/local/psa/admin/conf/templates/default/webmail/roundcube.php /usr/local/psa/admin/conf/templates/custom/webmail/

   • Horde:

     # cp /usr/local/psa/admin/conf/templates/default/webmail/horde.php /usr/local/psa/admin/conf/templates/custom/webmail/

4. Run the command below to list all available PHP versions. If a required PHP version is not listed, install it according to this KB article.

   # plesk bin php_handler --list

5. Now open the files roundcube.php and horde.php located in /usr/local/psa/admin/conf/templates/custom/webmail/ in a text editor one-by-one and change the PHP handler from "fastcgi" to a required one. Use any fastcgi version under the "id" column from step 4. In the example below, PHP version 5.6 is used:

   # grep fastcgi /usr/local/psa/admin/conf/templates/custom/webmail/roundcube.php
   FcgidInitialEnv PP_CUSTOM_PHP_CGI_INDEX plesk-php56-fastcgi
   
   # grep fastcgi /usr/local/psa/admin/conf/templates/custom/webmail/horde.php
   FcgidInitialEnv PP_CUSTOM_PHP_CGI_INDEX plesk-php56-fastcgi

6. Regenerate configuration files to apply the changes:

   # plesk repair web -server