<?php
$valore=$_POST['valore'];
$con=mysql_connect('localhost' , 'root' , '') or die(mysql_error());
mysql_select_db('tutorial_mysql' , $con) or die (mysql_error());
$result= mysql_query(" SELECT * FROM cities WHERE city LIKE '%$valore%' LIMIT 0,30 ") or die(mysql_error());

while($row=mysql_fetch_array($result)){
	echo $row['city']."<br>";
}
?>