Getting a Severity: Notice in codeigniter-phpbb community

Question

I am using a community in Codeigniter with phpbb. I don't know why but i am getting this error

    A PHP Error was encountered
    Severity: Notice
    Message: Undefined index: 43
    Filename: models/forum.php
    Line Number: 287

Here is that function

    public function forumGetter() {
        $rez = $this->db->select('*')->from('phpbb_forums')->where('forum_id != 75')->where('parent_id != 75')->get();
        $ret = array();
        $foruminfo = $this->forumInfo();
        foreach ($rez->result_array() as $k=> $v) {
            $x = $v;
            $x['usercount'] = intval($foruminfo[$v['forum_id']]['usercount']);
            $ret[$v['parent_id']][] = $x;
        }
        return $ret;
    }

and line 287 is

            $x['usercount'] = intval($foruminfo[$v['forum_id']]['usercount']);

where i am wrong or which kind of error is this?

Answer 1

Update this line:

$x['usercount'] = intval($foruminfo[$v['forum_id']]['usercount']);

To:

$x['usercount'] = isset($foruminfo[$v['forum_id']]) && isset($foruminfo[$v['forum_id']]['usercount']) ?
                  intval($foruminfo[$v['forum_id']]['usercount']) : 0;

---

The error is; you are trying to load an array value by the key 43, i.e. $foruminfo[$v['forum_id']][43] and you get that error when a value doesn't exist by the specified key. So, best option is to use isset() to assert before you use the key on the array.