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Objects, property visibility, and trade-offs

Note: This article was originally published at Planet PHP on 5 October 2010.
Planet PHP

As if on cue, the public vs. private debate has sprung up again within Drupal. The timing is fitting given my last blog post on programming language paradigms. Of course, property visibility is not a new debate, and the PHP community debates this subject from time to time (sometimes humorously).

What I believe is usually missing from these discussions, and what I hope to offer here, is a broader picture view of the underlying assumptions that lead to different conclusions about when different visibility is appropriate (if ever).

In short: It's the difference between procedural-think and object-think.

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