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Trait usage is not allowed

Reports the class references that are resolved to traits but are specified outside use statements. Such usages are most probably the result of a programming mistake, since traits cannot be instantiated and any instanceof-like behaviour is not supported for traits by design.

See Traits ( for details.

Locating this inspection


Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | PHP | Code style


By default bundled with

PhpStorm 2024.1, Qodana for PHP 2024.1,

Can be installed with plugin


Last modified: 18 June 2024