1.2.1063. Self Using Trait

Trait uses itself : this is unnecessary. Traits may use themselves, or be used by other traits, that are using the initial trait itself.

PHP handles the situation quietly, by ignoring all extra use of the same trait, keeping only one valid version.

<?php

// empty, but valid
trait a {}

// obvious self usage
trait b { use b; }

// less obvious self usage
trait c { use d, e, f, g, h, c; }

// level 2 self usage
trait i { use j; }
trait j { use i; }

?>

See also Traits.

1.2.1063.1. Suggestions

• Remove the extra usage of the trait.

1.2.1063.2. Specs

Short name	Traits/SelfUsingTrait
Rulesets	All, Changed Behavior, Class Review, Dead code
Exakat since	1.5.7
PHP Version	All
Severity	Minor
Time To Fix	Slow (1 hour)
Precision	High
Features	trait
Available in	Entreprise Edition, Exakat Cloud