Code Quality — Code Glossary | CodeClarityLab

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Missing Return Type Declarations PHP 7.0+

Functions without declared return types lose static analysis coverage, allow type confusion bugs, and make code harder to understand without reading the implementation.

3mo ago Code Quality beginner

Poor Variable Naming

Single-letter variables, cryptic abbreviations, or meaningless names like $data and $tmp — forcing readers to hold context in their head that the name should provide.

3mo ago Code Quality beginner

Prototype Pattern PHP 5.0+

Creating new objects by cloning a prototype — fast when object creation is expensive and variations are needed.

3mo ago Code Quality intermediate

Table Module Pattern

One class per database table handling all logic — a pragmatic middle ground between Transaction Script and full Domain Model.

3mo ago Code Quality intermediate

Transaction Script Pattern

A pattern where each business operation is a single procedure — simple, linear, and appropriate for straightforward workflows without complex domain logic.

3mo ago Code Quality intermediate

Unreachable Code PHP 5.0+

Code that can never execute because it follows a return, throw, exit, or an always-true condition — a sign of logic errors or forgotten cleanup.

3mo ago Code Quality beginner

Unused Function PHP 7.0+

A function or method that is defined but never called — dead code that increases maintenance burden and confuses readers about what is part of the active API.

3mo ago Code Quality beginner

Unused Variable PHP 5.0+

A variable that is assigned but never read — indicating a logic error, incomplete refactoring, or unnecessary computation.

3mo ago Code Quality beginner

ABC Metric (Assignments, Branches, Conditions) PHP 5.0+ 🧠 4

Code complexity metric using vector magnitude of assignments, branches, and conditions — more expressive than line count.

3mo ago Code Quality advanced

Diagram: Anemic Domain Model (Anti-Pattern)

Anemic Domain Model (Anti-Pattern) 🧠 2

Domain objects with only data (getters/setters) and no behaviour — business logic scattered across service classes.

3mo ago Code Quality advanced

Boy Scout Rule 🧠 1

Always leave the codebase slightly cleaner than you found it — small, consistent improvements prevent entropy accumulation.

3mo ago Code Quality beginner

Diagram: Builder Pattern

Builder Pattern PHP 5.0+

Constructs complex objects step-by-step using a fluent interface, separating construction from representation.

3mo ago Code Quality intermediate

Diagram: Chain of Responsibility Pattern

Chain of Responsibility Pattern PHP 5.0+

Passes a request along a chain of handlers, each deciding whether to process it or pass it to the next handler.

3mo ago Code Quality intermediate

Diagram: Code Ownership & CODEOWNERS

Code Ownership & CODEOWNERS

CODEOWNERS defines which team members must review changes to specific files or directories — enforcing expertise-based review and preventing unreviewed changes to critical code.

3mo ago Code Quality beginner

The degree to which elements within a module belong together; high cohesion means a class does one thing and does it well.

3mo ago Code Quality intermediate

Command Pattern PHP 5.0+

Encapsulates a request as an object, enabling queuing, logging, undo/redo, and decoupling of request sender from receiver.

3mo ago Code Quality intermediate

Command Query Separation (CQS) 🧠 1

Methods should either return a value (query) or change state (command), but never both.

3mo ago Code Quality intermediate

Comments as Code Smell

Excessive or explanatory comments often indicate that the code itself is too complex or poorly named to be self-explanatory.

3mo ago Code Quality beginner

Composite Pattern

Treats individual objects and compositions of objects uniformly through a shared interface, enabling tree-structured hierarchies.

3mo ago Code Quality intermediate

Composition Over Inheritance 🧠 1

Favour assembling behaviour from injected collaborator objects rather than inheriting it from a parent class.

3mo ago Code Quality intermediate

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