// tableau des extras, tries par table SQL
function iextras_get_extras_tries_par_table(){
	$extras = iextras_get_extras();
	$tables = $extras_tries = array();
	foreach($extras as $e) {
		if (!isset($tables[$e->table])) {
			$tables[$e->table] = array();
		}
		$tables[$e->table][] = $e;
	}
	sort($tables);
	foreach ($tables as $table) {
		foreach ($table as $extra) {
			$extras_tries[] = $extra;
		}
	}
	return $extras_tries;
}