September 2016
Intermediate to advanced
1091 pages
21h 41m
English
Content preview from PHP 7: Real World Application DevelopmentBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 3. SOLID Design Principles
Building modular software requires strong knowledge of the class design. There are numerous guidelines out there, addressing the way we name our classes, number of variables they should have, what the size of methods should be, and so on. The PHP ecosystem managed to pack these into official PSR standard, more precisely PSR-1: Basic Coding Standard and PSR-2: Coding Style Guide. These are all general programming guidelines that keep our code readable, understandable, and maintainable.
Aside from programming guidelines, there are more specific design principles that we can apply during the class design. Ones that address the notions of low coupling, high cohesion, and strong encapsulation. We call them SOLID ...
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