When you will create a workflow you will use special patterns in setting fields of actions and triggers to get values of variables that belong to currently executing workflow, system variables, WordPress global variable and constants. During the execution of the workflow all of the patterns will be replaced with actual values.
The current PHP version as a string in "major.minor.release[extra]" notation.
The current PHP "major" version as an integer (e.g., int(5) from version "5.2.7-extra"). Available since PHP 5.2.7.
The current PHP "minor" version...
Yes, you can rapidly create native WordPress filters by using workflows. Workflows, created by using JetFlow.io plugin are extremely fast and the filter can be made in a few minutes without coding and having knowledge of PHP. You will get your new filter instantly having created and enabled the workflow.