Quality terms
Because working code and good code are not the same thing
Code that works today but cannot be understood, tested, or modified tomorrow is a liability, not an asset. Code quality covers metrics, static analysis, design principles like SOLID and DRY, refactoring techniques, and the habits that separate codebases teams love from ones they dread maintaining. Good quality is not about perfection — it is about making the next change easier than the last.
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Most referenced — Code Quality
Maintainability Index 1Type Safety in PHP (strict_types & Static Analysis) 1Interface Segregation Principle 1KISS Principle 1Dead Code 1Fail Fast Principle 1Builder Pattern 1Transaction Script Pattern 1
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Code Readability Metrics
Readability can be measured — cyclomatic complexity, cognitive complexity (SonarQube), lines per function, parameter count, and nesting depth are all quantifiable proxies for readability.
2mo ago
quality intermediate
Extract Class Refactoring
Extract Class splits a large class into two — moving a cohesive subset of fields and methods into a new class that the original delegates to.
2mo ago
quality intermediate
Inline Temp Variable Refactoring
Inline Temp removes a temporary variable used only once when its name adds no clarity — replacing the variable reference with its expression directly.
2mo ago
quality beginner
IoC Container PHP 7.0+
An Inversion of Control container automatically resolves and injects class dependencies — you declare what a class needs, the container figures out how to create it, eliminating manual dependency wiring.
2mo ago
quality intermediate
Method Chaining Pitfalls & Alternatives
Method chaining (fluent interfaces) improves readability for builders but creates debugging difficulties, encourages temporal coupling, and can hide null returns.
2mo ago
quality intermediate
Reducing Cyclomatic Complexity Techniques
Cyclomatic complexity counts independent code paths — reduce it by early returns, extracting conditions to named functions, using lookup tables, and replacing switch/if chains with polymorphism.
2mo ago
quality intermediate
Refactoring Boolean Flag Parameters
Boolean flags as function parameters obscure intent — replace with enums, separate functions, or named options objects for self-documenting APIs.
2mo ago
quality intermediate
Replace Magic Literal with Symbolic Constant
Magic literals (numbers/strings hardcoded without context) should become named constants — MAX_RETRIES = 3 is self-documenting; the literal 3 is not.
2mo ago
quality beginner
Types of Code Duplication (Clone vs Semantic)
Not all duplication is equal — clone duplication (copy-paste) always warrants extraction, but semantic duplication (similar logic, different context) may be acceptable.
2mo ago
quality intermediate
Abstract Factory Pattern PHP 5.0+
Creates families of related objects ensuring they are used together consistently without mixing implementations.
2mo ago
quality intermediate
Active Record Pattern PHP 5.0+
A design pattern where a database row is wrapped in an object that includes both the data and the persistence logic — the object knows how to save, update, and delete itself.
2mo ago
quality intermediate
Dead Condition PHP 5.0+
A boolean condition that is always true or always false due to logic errors, making the branch either always execute or never execute.
2mo ago
quality intermediate
Domain Model Pattern
An object model of the domain that incorporates both behaviour and data — entities with methods expressing domain operations rather than just data containers.
2mo ago
quality advanced
Error Suppression Operator (@) PHP 5.0+
Prefixing a PHP expression with @ silently suppresses all errors and warnings it generates — hiding bugs instead of handling them.
2mo ago
quality beginner
Fluent Builder Pattern
Returns $this from each setter enabling method chaining — used in query builders, test factories, and configuration objects.
2mo ago
quality intermediate
Gateway Pattern
A class that encapsulates access to an external system or resource — wrapping HTTP APIs, queues, or legacy systems behind a clean interface that the rest of the application uses.
2mo ago
quality intermediate
Global Variable Abuse PHP 5.0+
Using global variables or the global keyword to share state between functions — making code unpredictable, untestable, and impossible to reason about.
2mo ago
quality intermediate
Interpreter Pattern
A grammar represented as a class hierarchy — used for search query parsers, expression evaluators, and rule engines.
2mo ago
quality advanced
Low Cohesion
A class or module that does many unrelated things — high coupling's counterpart, making code hard to understand, test, and reuse.
2mo ago
quality intermediate
Memento Pattern PHP 5.0+
A behavioural pattern that captures an object's internal state and stores it externally so it can be restored later — enabling undo, snapshots, and versioning without exposing internals.
2mo ago
quality intermediate