Automatic Detection of PHP Namespace and Class Constant Issues in Laravel Projects

1. Background – PHP namespaces resolve name collisions and improve readability; however, missing imports or undefined class constants cause fatal errors that may reach production.

2. Detection analysis – The tool parses each file to collect used classes, imported namespaces, the file's own namespace, and class constants, then checks whether the referenced classes exist and whether constants are defined, recursively inspecting parent classes.

3. File parsing – Four class usage patterns are identified and extracted via regular expressions, while namespace imports are captured using use statements (including PHP 7 group imports). The token_get_all function is employed to retrieve namespaces, class names, parent classes, and implemented interfaces.

4. Core implementation – Namespace detection is performed by getClassNameSpace and checkNamespace functions, which resolve fully‑qualified class names and verify their existence against Composer's class map. Class‑constant detection uses constantIsDefine , checkConstant , and recursive parent‑class checks.

5. Detection workflow – Integrated into GitLab CI, the scanner runs on each commit, reports missing imports or undefined constants via enterprise WeChat, and provides example alarm cases.

6. Future plans – The platform, already deployed in nine projects, will be integrated with the internal KeOnes code‑inspection system to broaden coverage across Laravel applications.