array_filter,匿名函数

    static function get_categoryII() {
        return array(
            array(‘id‘ => 1, ‘c1id‘ => 1, ‘name‘ => ‘1aaaa‘),
            array(‘id‘ => 2, ‘c1id‘ => 1, ‘name‘ => ‘1bbb‘),
            array(‘id‘ => 3, ‘c1id‘ => 2, ‘name‘ => ‘1bbbb‘),
            array(‘id‘ => 4, ‘c1id‘ => 3, ‘name‘ => ‘1cccccc‘),
        );
    }

    function mytest() {
        $res = self::get_categoryII();
        $catid = 2;
        $r = array_filter($res, function($t) use ($catid) {
            return $t[‘c1id‘] == $catid;
        });
        dump($r);
    }