PHP Traits vs Abstract Classes vs Interfaces: When to Use Each
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PHP Traits vs Abstract Classes vs Interfaces: When to Use Each PHP's OOP system gives you three tools for sharing behavior -- traits, abstract classes, and interfaces -- but each one solves a fundamentally different problem. Picking the wrong one leads to brittle hierarchies, duplicated logic, or code that's nearly impossible to test. PHP powers 72.0% of all websites with a known server-side language (W3Techs, February 2026), and 76% of PHP developers identify as using object-orient