After contacting Synology support and receiving a reply, I learned that an upcoming WebStation update, which will make PHP 7.2.13 work, will be released on the 22nd of January, 2019, and be available for download via the Synology Package Center. The current version of WebStation (version 0143) cannot detect PHP 7.2.13 yet. The official answer from the Synology support team is as follows:

PHP 7.2 is released now, but it must work with newer version of Web Station, which is not released yet. It's deferred to ~Tuesday 22 January because of some issues.

Once the new update to the WebStation package is released, you need to “stop” all the processes that are reliant on WebStation which are PHP version 5.6, PHP version 7.0, PHP version 7.2, phpMyAdmin, Apache server 2.2, Apache server 2.4 and the WordPress package from Synology.

Then, after installing the new WebStation version, you have to reactivate all the processes that you’ve previously stopped and everything will work well again.

WebStation version 0146 was released today at 5:00 AM. Everything is working like a charm, especially PHP version 7.2.13 which is perfectly compatible with the new WebStation version.

This post was updated on Thursday / April 7th, 2022 at 11:46 PM