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Complex class should be refactored

Reports the classes that are too complex.

Class complexity is evaluated based on three metrics:

  • TCC (Tight class cohesion) — the measure of class cohesiveness (more is better).

  • WMC (Weighted Method count) — the sum of cyclomatic complexities for all methods in a class (less is better).

  • ATFD (Access to foreign data) — the number of properties from another class that are accessed in the current class (less is better).

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 | Refactoring opportunities

Inspection options

Here you can find the description of settings available for the Complex class should be refactored inspection, and the reference of their default values.

TCC threshold


WMC threshold


ATFD threshold



By default bundled with

PhpStorm 2024.1, Qodana for PHP 2024.1,

Can be installed with plugin

PHP Architecture, 241.SNAPSHOT

Last modified: 18 June 2024