To know if a class uses a trait

is-class-uses-a-trait.php

<?php
/**
 * To know if a class uses a trait
 * @param string $className The class name to inspect
 * @param string $traitName The trait class name
 * @return bool true if $className uses $traitName
 */
function is_using($className,$traitName){
    return in_array($traitName,class_uses($className));
}