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 (php.net) for details.
Locating this inspection
- By ID
Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.
PhpTraitUsageOutsideUseInspection- 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.
Inspection ID: PhpTraitUsageOutsideUseInspection
Suppressing Inspection
You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:
More detailed instructions as well as other ways and options that you have can be found in the product documentation:
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By default bundled with: | IntelliJ IDEA 2025.3, PhpStorm 2025.3, Qodana for JVM 2025.3, Qodana for PHP 2025.3, |