codice:
$Limit = 5;
$s=$_POST["s"];

$SearchResult=mysql_query("SELECT * FROM `mysql_table` WHERE `ragionesociale` LIKE '%$s%' OR `indirizzo` LIKE '%$s%' OR `cap` LIKE '%$s%' OR `citta` LIKE '%$s%' OR `provincia` LIKE '%$s%' OR `regione` LIKE '%$s%' ORDER BY `ragionesociale` ASC") or die(mysql_error());