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Messages in PHP

Matthias Noback continues his highly interesting series of posts with programming guidelines. Part four is about messages.

Besides having a type and a particular value, messages can also be categorized:

  • A command message is a request for change. One object wants to make the other object do something.
  • A query message is a request for information. One object wants to get something from the other object.
  • A document message is the response from the other object, based on the query that was sent to it.


Freek Van der Herten is a partner and developer at Spatie, an Antwerp based company that specializes in creating web apps with Laravel. After hours he writes about modern PHP and Laravel on this blog. When not coding he’s probably rehearsing with his kraut rock band.