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• PHP 7.4.x is required for FreePBX 16. 

• Before we start upgrade tool, we have to upgrade system PHP to 7.4

• If you are using Debian then you could refer/follow "Install FreePBX 16.0 on Debian" wiki guide to update PHP  version to 7.4. 

  • Please note that, for an existing system we just have to update the PHP version not all the dependent other system packages.

  • Update to SURY repository process to update PHP 7.4.x would be enough for an existing Debian system.

    • https://wiki.sangoma.com/display/FOP/Installing+FreePBX+16+on+Debian+10.9#InstallingFreePBX16onDebian10.9-InstalltheSURYRepositorySigningKey

    • https://wiki.sangoma.com/display/FOP/Installing+FreePBX+16+on+Debian+10.9#InstallingFreePBX16onDebian10.9-InstalltheSURYRepositoryandUpdateyoursystempackages

    • https://wiki.sangoma.com/display/FOP/Installing+FreePBX+16+on+Debian+10.9#InstallingFreePBX16onDebian10.9-InstallRequiredDependencies Install the SURY Repository Signing Key

    • Install the SURY Repository and Update your system packages

    • Install Required Dependencies
      

• use "php -v" command in Linux cli to confirm the PHP version.
  

  Code Block
  root@vultr:/var/www/html/admin/libraries# php -v PHP 7.4.22 (cli) (built: Jul 30 2021 13:09:18) ( NTS ) Copyright (c) The PHP Group

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1. Take Backup of your FreePBX-13/14 System.

   1. Take full backup of your FreePBX-13/14 system using Backup & Restore module of FreePBX-13/14.  Please refer to Using the Backup module for further details of how to configure and take full backup of your 13/14 system.

2. Install FreePBX-16 on another server.

   1. Install latest available FreePBX-16 ISO from https://www.freepbx.org/downloads/  to another server. Please refer to Installing SNG7 Official Distro for more details about the installation process.

3. Activate FreePBX-16 

   1.  Once FreePBX-16 installation is done, activate your FreePBX-16. Please refer to System Admin - Activation for more details about the system activation process.

4. Upgrade all FreePBX-16 modules to current 

   1. After activation , FreePBX will show you a pop up with a list of available module updates. Otherwise you can check yourself by using "Check Online" function in Module Admin. Please refer to Updates#ModuleUpdates for more details.

5. Restore 

   1. Please note that Backup & Restore has been completely re-designed in FreePBX-15/FreePBX-16 so you will see GUI differences in the way it used to work in FreePBX-13/14 vs FreePBX-15/FreePBX-16.

   2. Please refer to Backup and Restore FreePBX 15+ for more about the FreePBX-15/FreEPBX-16 Backup & Restore module. 

   3. We can restore the configurations by uploading the FreePBX-13/14 generated configuration backup to "FreePBX GUI → Admin → Backup & Restore → Restore tab".

   4. After a successful restore , your FreePBX-13/14 is successfully replicated to new FreePBX-16.

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