Refactoring

A thorough reference covering 89 refactoring techniques and code smells — featuring PHP 8.3+ examples, rationale, step-by-step mechanics, and before/after comparisons.

Refactoring Techniques (67)

Composing Methods

• Extract Method — Pull code fragments into named methods → reference
• Inline Method — Substitute a method call with its body → reference
• Extract Variable — Give complex expressions meaningful names through explanatory variables → reference
• Inline Temp — Substitute a temporary variable with its expression → reference
• Replace Temp with Query — Swap temp variables for method calls → reference
• Split Temporary Variable — Assign separate variables for separate purposes → reference
• Remove Assignments to Parameters — Introduce local variables rather than reassigning parameters → reference
• Replace Method with Method Object — Convert a complex method into its own class → reference
• Substitute Algorithm — Swap an algorithm for a clearer alternative → reference

Moving Features Between Objects

• Move Method — Relocate a method to the class that depends on it most → reference