June 2010
Intermediate to advanced
536 pages
16h 52m
English
Content preview from PHP Objects, Patterns, and Practice, Third Edition
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CHAPTER 9 ■ GENERATING OBJECTS
150
to installation. The object may also be used as a notice board, a central location for messages that could
be set or retrieved by otherwise unrelated objects in a system.
Passing a Preferences object around from object to object may not always be a good idea. Many
classes that do not otherwise use the object could be forced to accept it simply so that they could pass it
on to the objects that they work with. This is just another kind of coupling.
You also need to be sure that all objects in your system are working with the same Preferences object.
You do not want objects setting values on one object, while others read from an entirely different one.
Let’s distill the forces in this problem:
• A Preferences ...
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