Erreur SQL !
FROM posts WHERE (titre_post REGEXP "[[:<:]]pr(o|ô|ö)d(u|ù|û|ü)(i|î|ï)ts[[:>:]]" OR texte_post REGEXP "[[:<:]]pr(o|ô|ö)d(u|ù|û|ü)(i|î|ï)ts[[:>:]]") AND (titre_post REGEXP "[[:<:]]d(e|é|è|ê|ë)r(i|î|ï)v(e|é|è|ê|ë)s1[[:>:]]" OR texte_post REGEXP "[[:<:]]d(e|é|è|ê|ë)r(i|î|ï)v(e|é|è|ê|ë)s1[[:>:]]") AND affiche_post="1" AND sujet_post="1" ORDER BY id_post DESC