PHP-Features die Du kennen solltest
summary
Explains concrete uses: Enums as real types replace ad‑hoc class constants and enable typed, backed values that prevent invalid states and make serialization and validation consistent; match expressions for exhaustive branching remove fallthrough and ambiguous truthiness so logic maps to intent; shows code patterns converted from conditionals to enums+match, describes resulting fewer runtime-assertions and clearer error paths, and notes practical migration steps and pitfalls.
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