(PHP 5 >= 5.4.0, PHP 7)
class_uses — Return the traits used by the given class
This function returns an array with the names of the traits that the
given class uses. This does however not include
any traits used by a parent class.
classAn object (class instance) or a string (class name).
autoloadWhether to allow this function to load the class automatically through the __autoload() magic method.
An array on success, or FALSE on error.
Example #1 class_uses() example
<?php
trait foo { }
class bar {
use foo;
}
print_r(class_uses(new bar));
print_r(class_uses('bar'));
function __autoload($class_name) {
require_once $class_name . '.php';
}
// use __autoload to load the 'not_loaded' class
print_r(class_uses('not_loaded', true));
?>
以上例程的输出类似于：
Array
(
[foo] => foo
)
Array
(
[foo] => foo
)
Array
(
[trait_of_not_loaded] => trait_of_not_loaded
)