1 - only_alphanum_and_dot - filtrer les caractères pour un fichier
function only_alphanum_and_dot($string){return preg_replace('#[^a-zA-Z0-9\. ]#','',$string);}
function only_alphanum_and_dot($string){return preg_replace('#[^a-zA-Z0-9\. ]#','',$string);}