(PHP 5, PHP 7)
get_declared_interfaces — Returns an array of all declared interfaces
Gets the declared interfaces.
Returns an array of the names of the declared interfaces in the current script.
Example #1 get_declared_interfaces() example
<?php
print_r(get_declared_interfaces());
?>
The above example will output something similar to:
Array
(
    [0] => Traversable
    [1] => IteratorAggregate
    [2] => Iterator
    [3] => ArrayAccess
    [4] => reflector
    [5] => RecursiveIterator
    [6] => SeekableIterator
)