SimpleXMLElement addChild
     ( string $name
    [, string $value
    [, string $namespace
   ]] )
    mixed asXML
     ([ string $filename
   ] )
    SimpleXMLElement attributes
     ([ string $ns
    [, bool $is_prefix
   ]] )
    SimpleXMLElement children
     ([ string $ns
    [, bool $is_prefix = false
   ]] )
    array getDocNamespaces
     ([ bool $recursive
   ] )
    string getName
     ( void
    )
    array getNamespaces
     ([ bool $recursive
   ] )
    bool registerXPathNamespace
     ( string $prefix
    , string $ns
    )
    array xpath
     ( string $path
    )
   }