统计过去数据一个php脚本

<!-- lang: php -->

<pre><code>
<?php
$con=mysql_connect('xxxx', 'xxx', 'xxx');
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db('promo', $con);
//$time="2013-09-13";
//$date =date('Y-m-d');
$i=70;
while($i>=30){
$date = date('Y-m-d', strtotime("-". $i." day"));
//echo $date;
$sql = "select count(*) as ant from adm_sys_op_log where last_changed_date like '%s%%'";
$sql=sprintf($sql,$date);
//echo $sql."\n";
$rs = mysql_query($sql, $con);

$row = mysql_fetch_array($rs);
$product_id = $row['ant'];
echo $date." ".$product_id."\n";
$i--;
}
mysql_close($con);
exit;

var_dump(strtotime($date)>strtotime('2013-09-3'));exit;
$sql = "select count(*) as ant from adm_sys_op_log where last_changed_date like '%s%%'";
$sql=sprintf($sql,$time);
var_dump($sql);exit;
$rs = mysql_query($sql, $con);

$row = mysql_fetch_array($rs);
$product_id = $row['ant'];
var_dump($product_id);

mysql_close($con);
?>
</code></pre>