自己写的第一个php小程序

<?php
/**
 * 首页
 */
require '../init.php';
require PATH_ADMIN .'/config/cfg_database.php';
$db = mysql_connect( $GLOBALS ['database'] ['db_host'],$GLOBALS ['database'] ['db_user'],$GLOBALS ['database'] ['db_pass']);//链接数据库
echo 10;
mysql_select_db($GLOBALS ['database'] ['db_name'],$db);
mysql_query("set names UTF8" , $db);
$cur_page = intval($_POST['start']);
if($cur_page<1)
{
$cur_page=1;
}
$offset   = 50;
$start    = ($cur_page - 1) * $offset;

$sql="SELECT * FROM `dh_site` WHERE url LIKE '%14168411%'";
$sql .= ' limit '.$start.','.$offset;
$result = mysql_query($sql,$db);//获取结果集
if($result){
   while($row = mysql_fetch_array($result))//这里将结果集转换成了数组{
            $url=str_replace("14168411","24739801",$row["url"]);//替换掉里面淘宝客的ID为自己的
   echo $url."<br>";//这里输出查看当前的记录
           $sql="update dh_site set url='$url' where id=".$row["id"]; //开始更新   
     mysql_query($sql);
   
           }

}

?>