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:
    public function destroy($name)
    {
        if (!array_key_exists($name, $this->_storage)) {
            trigger_error(
                "Attempted to destroy non-existent variable $name",
                E_USER_ERROR
            );
            return;
        }
        unset($this->_storage[$name]);
    }