duda con uso de json

[xoceunder]

Código PHP:

$salida_xml .= "<MoviesId>".$res['cve']."</MoviesId>";
$salida_xml .= "<Title>".utf8_encode($res['titulo_latino'])."</Title>"; 
$salida_xml .= "<ContentType>Movies</ContentType>";
$salida_xml .= "<Description>".utf8_encode($description['sinopsis'])."</Description>";  
$salida_xml .= "<ReleaseDate>".$res['anio']."</ReleaseDate>"; 
$salida_xml .= "<Rating>".$res['clasificacion']."</Rating>"; 
$salida_xml .= "<StarRating>80</StarRating>"; 
$salida_xml .= "<Actors>".$res['director']."</Actors>";
$salida_xml .= "<Directors>".$res['reparto']."</Directors>";
$salida_xml .= "<Categories>".$generos."</Categories>";
$salida_xml .= "<Length>".$res['duracion']."</Length>";
$salida_xml .= "<StreamUrls>".$res['url_video']."</StreamUrls>";
$salida_xml .= "<StreamFormat>".strtolower($res['formato_video'])."</StreamFormat>";
$salida_xml .= "<HDPosterURL>http://144.217.94.67/posters/".$poster."</HDPosterURL>";
$salida_xml .= "<hdbackgroundimageurl>".$res['fondo']."</hdbackgroundimageurl>";
$salida_xml .= "<Pin>".$res['pedir_pin']."</Pin>";
$salida_xml .= "<SubtitleUrl>".$sub['subtitulo']."</SubtitleUrl>";
 
$salida_xml .= "</item>\n";  
 
}
 
 
$salida_xml .= "</category>\n";
 
}
 
$salida_xml .= "</channel>";
$salida_xml .= "</rss>";
echo $salida_xml;