<?php

mysql_connect("127.0.0.1", "root", "");
mysql_select_db("test") or die(mysql_error());

mysql_query("BEGIN") or die(mysql_error());

while (true) {
  mysql_query("UPDATE t1 SET val = val + 1 WHERE id = 1") or die(mysql_error());
  echo "."; flush();
  sleep(1);
}