Plane den Trolleydienst für deine Versammlung kinderleicht. Du kannst das Trolley Programm auf deinen Server installieren und nach belieben in der Programmiersprache PHP an die Bedürfnisse deiner Versammlung anpassen.
The question is how many people have a webserver with php5 or php7.
I chose PHP7 because it includes features that it make easier to write the tool, such as the type declarations.
I know security issues are maintance decision for PHP7 but PHP5 is always standard at all yet...