Erreur SQL :
SELECT * FROM formulaire_valeur_champ vc LEFT JOIN formulaire_champ c ON c.id_formulaire_champ=vc.id_formulaire_champ WHERE c.id_formulaire=1 AND id_centre= AND (id_lang=1 OR id_lang=0)
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'AND (id_lang=1 OR id_lang=0)' at line 3