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:
        foreach ($keys as $key) {
            if (array_key_exists($key, $array)) {
                $array[$key] = self::convertHtmlSpecialChars($array[$key]);
            }
        }