1.2.461. Final Traits Are Final

A final method in a trait is also final when in its importing class. This means that the importing class may redefine it, but not the children.

<?php

trait t {
     final function FFinal() {}
     final function FNotFinalInClass() {}
     function FNotFinal() {}     // This is a normal method
}

class x {
     use t;

     function FNotFinalInClass() {}

}

class y extends x  {
     function FFinal() {}            // This is KO, as it is final in the trait
     function FNotFinalInClass() {}  // This is OK, the class as priority
     function FNotFinal() {}
}
?>

1.2.461.1. Specs

Short name	Traits/FinalTraitsAreFinal
Rulesets	All, CompatibilityPHP53, CompatibilityPHP54, CompatibilityPHP55, CompatibilityPHP56, CompatibilityPHP70, CompatibilityPHP71, CompatibilityPHP72, CompatibilityPHP73, CompatibilityPHP74, CompatibilityPHP80, CompatibilityPHP81, CompatibilityPHP82
Exakat since	2.5.3
PHP Version	With PHP 8.3 and older
Severity	Minor
Time To Fix	Quick (30 mins)
Precision	High
Available in	Entreprise Edition, Exakat Cloud