通过PHP CLI实现简单的数据库实时监控调度

!#/usr/local/php/bin/php
<?php
mysql_connect('localhost', 'username', 'password');
mysql_select_db("test");
echo 'PID: '.posix_getpid().' '; //当前进程PID（linux下）
$old_id = 0;
while (1)
{
$sql = "SELECT `id` FROM `user` ORDER BY `id` DESC LIMIT 1";
$result = mysql_query($sql);
$item = mysql_fetch_assoc($result);
$new_id = $item['id'];
$values_arr = array();
for ($i=$new_id; $i>$old_id && $old_id!=0; $i--)
{
$sql = "SELECT `name`,`age` FROM `user` WHERE `id`='{$i}' LIMIT 1";
$result = mysql_query($sql);
$item = mysql_fetch_assoc($result);
$name = $item['name'];
$age = $item['age'];
$values_arr[] = "('{$name}', '{$age}')";
}
if (!emptyempty($values_arr))
{
$values_str = implode(',', $values_arr);
$sql = "INSERT INTO `user2`(`name`, `age`) VALUES {$values_str}";
mysql_query($sql);
}
$old_id = max($old_id, $new_id);
sleep(3); //3秒后进入下次循环
}