function post_edition($flux){

	if (
		($action = $flux['args']['action']) == 'instituer' // action instituer
		and ($table = $flux['args']['table']) == 'spip_articles' // on institue un article
		and $id_article = $flux['args']['id_objet'] // identifiant de l'article
		and $statut = $flux['data']['statut'] // nouveau statut
	) {

		// ton code...
}