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:
    protected function getTagName($node)
    {
        if (isset($node->tagName)) {
            return $node->tagName;
        } else if (isset($node->nodeName)) {
            return $node->nodeName;
        } else if (isset($node->localName)) {
            return $node->localName;
        }
        return null;
    }