CRITICAL
Rule Definition
A class with many parents is an indicator of an unbalanced and incorrect class hierarchy. A refactoring of this class hierarchy should be considered.
Remediation
Review the architecture of the application to reduce the number of parents of the class.
Reference
PHPMD - http://phpmd.org/rules/design.html#depthofinheritance
Related Technologies
Technical Criterion
Complexity - OO Inheritance and Polymorphism
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