Erreur SQL !
SELECT * FROM flux_actu WHERE theme_src="monde" and id_flux_actu="535938$article=matteo-salvini-le-capitaine-naufrageur" UNION (SELECT * FROM flux_sport WHERE theme_src="monde" and id_flux_sport="535938$article=matteo-salvini-le-capitaine-naufrageur") UNION (SELECT * FROM flux_tech WHERE theme_src="monde" and id_flux_tech="535938$article=matteo-salvini-le-capitaine-naufrageur") UNION (SELECT * FROM flux_foot WHERE theme_src="monde" and id_flux_foot="535938$article=matteo-salvini-le-capitaine-naufrageur")