Language: PHP
Label: safe
CWE: CWE-79 \u2014 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Code:
    private function _listify($lookup)
    {
        $list = array();
        foreach ($lookup as $name => $b) {
            $list[] = $name;
        }
        return implode(', ', $list);
    }