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<?php trait Blah { function getOne() { return 1;} } abstract class AbstractTest { use Blah; } class Test extends AbstractTest {} function hier($class) { $traits = class_uses($class) ?: []; $parents = class_parents($t) ?: []; foreach ($parents as $parent) { array_merge($traits, hier($parent)); } return $traits; } $t = new Test; echo $t->getOne() . "\n"; var_dump(hier($t));

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