if ($a = extraire_balise($header, 'description')
OR $a = extraire_balise($header, 'tagline')) {
cdata_echappe_retour($a, $echappe_cdata);
if ($a = extraire_balise($header, 'description')
OR $a = extraire_balise($header, 'tagline')) {
cdata_echappe_retour($a, $echappe_cdata);