<?php
trait T1 { function m1() { } function m2() { } }

class C1 { }
class C2 { use T1; }
class C3 { use T1 { m1 as a1; } }
class C4 { use T1 { m1 as a1; m2 as a2; } }

$classes  = ['C1', 'C2', 'C3', 'C4'];
foreach ($classes as $c) {
    echo "class $c:\n";
    $r = new ReflectionClass($c);
    var_dump($r->getTraitAliases());
    echo "\n";
}
?>