Composer

Duplicate package entries in composer.json  

Reports duplicate package entries in the require and require-dev sections of composer.json.

Extension is missing in composer.json  

Reports the usages of classes, functions, and constants from the PHP extensions not specified in composer.json.

Non-installed Composer packages  

Reports the Composer packages that are required in composer.json but are not installed.

Quality tool inspection is disabled  

Highlights the quality tools' entries in composer.json in case the corresponding code inspections are disabled.

Unresolved file references  

Reports unresolved file references in composer.json.