PHP Copy/Paste Detector

PHP Copy-Paste Detector finds duplicated code within your PHP projects, making it easy to follow the “Don’t Repeat Yourself” (DRY) principle.

Most developers agree that copying and pasting code is a poor form of reuse and a bad practice. However, it’s common because creating proper, reusable code can take extra time and money in the short term.

Now you can save time and build a truly structured codebase. This tool empowers you to detect copy-paste mistakes, so you can focus on writing clean, reusable code. You can download the tool on our GitHub page.

PHPCPD key features:

Promotes a clean, reusable codebase

By actively identifying redundant code blocks, PHPCPD enforces the DRY (Don't Repeat Yourself) principle at an architectural level. This systemic approach significantly reduces technical debt, lowers architectural complexity, and ensures a lean, maintainable foundation for long-term project growth.

Prevents a single bug from spreading everywhere

Duplicating business logic inevitably means duplicating existing defects and potential security vulnerabilities. PHPCPD mitigates this critical risk by ensuring that core logic remains centralized, preventing a single hidden flaw from propagating across multiple endpoints in the application and exponentially increasing the attack surface.

Simplifies bug fixes and future updates

Maintaining fragmented codebases with copied logic is operationally expensive and error-prone. Eliminating duplication means that bug fixes, feature enhancements, or security patches need to be applied only once to a single source of truth. This dramatically accelerates development velocity and minimizes regression risks during critical updates.