1: <?php
2: /*
3: You may not change or alter any portion of this comment or credits
4: of supporting developers from this source code or any supporting source code
5: which is considered copyrighted (c) material of the original comment or credit authors.
6:
7: This program is distributed in the hope that it will be useful,
8: but WITHOUT ANY WARRANTY; without even the implied warranty of
9: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
10: */
11:
12: namespace Xoops\Core\Lists;
13:
14: /**
15: * SubSet - return a list which is a subset of another list
16: *
17: * @category Xoops\Core\Lists\SubSet
18: * @package Xoops\Core
19: * @author Richard Griffith <richard@geekwright.com>
20: * @copyright 2015 XOOPS Project (http://xoops.org)/
21: * @license GNU GPL 2 or later (http://www.gnu.org/licenses/gpl-2.0.html)
22: * @link http://xoops.org
23: */
24: class SubSet extends ListAbstract
25: {
26: /**
27: * return a subset of a list
28: *
29: * @param array $list associative list array
30: * @param array $keys indexed array of keys to keep
31: *
32: * @return array
33: */
34: public static function getList($list = [], $keys = null)
35: {
36: if (is_array($keys)) {
37: $keys = array_flip($keys);
38: $subset = array_intersect_key($list, $keys);
39: return $subset;
40: }
41: return($list);
42: }
43: }
44: