class_uses
(PHP 5 >= 5.4.0, PHP 7, PHP 8)
class_uses — Return the traits used by the given class
說明
class_uses(object|string
$object_or_class, bool $autoload = true): array|false
This function returns an array with the names of the traits that the
given object_or_class uses. This does however not include
any traits used by a parent class.
參數
-
object_or_class -
An object (class instance) or a string (class name).
-
autoload -
Whether to call __autoload by default.
返回值
An array on success, or false when the given class doesn't exist.
範例
示例 #1 class_uses() example
<?php
trait foo { }
class bar {
use foo;
}
print_r(class_uses(new bar));
print_r(class_uses('bar'));
spl_autoload_register();
// use autoloading to load the 'not_loaded' class
print_r(class_uses('not_loaded', true));
?>
以上例程的輸出類似於：
Array
(
[foo] => foo
)
Array
(
[foo] => foo
)
Array
(
[trait_of_not_loaded] => trait_of_not_loaded
)