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(PHP 5 >= 5.4.0)

class_uses — Return the traits used by the given class

說明

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.

參數

class

An object (class instance) or a string (class name).

Whether to allow this function to load the class automatically through the __autoload() magic method.

返回值

An array on success, or FALSE on error.

范例

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));

?>

以上例程的輸出類似于：

Array
(
    [foo] => foo
)
Array
(
    [foo] => foo
)
Array
(
    [trait_of_not_loaded] => trait_of_not_loaded
)

參見

class_parents() - 返回指定類的父類。 get_declared_traits() - 返回所有已定義的 traits 的數組