php 操作数据库

         $datetoday = date('Y-m-d');
         $datetime  = $thedate;
         $data_info = $data;

         $db = array(
             'dsn' => 'mysql:host=192.168.1.111;dbname=wz_action',
             'host' => '192.168.1.111',
             'dbname' => 'wz_action',
             'username' => 'root',
             'password' => '',
             'charset' => 'utf8',
             'port' => '',
         );
         //建立连接
         $link = mysql_connect($db['host'], $db['username'], $db['password']) or die( 'Could not connect: '  .  mysql_error ());
         //选择数据库
         mysql_select_db($db['dbname'], $link) or die ( 'Can\'t use foo : '  .  mysql_error ($link));
         // 设置字符集
         mysql_set_charset($db['charset'], $link);

         // 删除数据
         mysql_query("delete from calendar where datetoday = '{$datetime}'");
         // 保存数据
         $exec="insert into calendar(datetoday,datetime,data_info) values('$datetoday','$datetime','$data_info')";
         $result=mysql_query($exec);
         // 查询语句
         $sel_sql = "select datetoday from calendar where datetime = '{$thedate}'";
         $res     = mysql_query($sel_sql);
         $timeArr = mysql_fetch_array($res,MYSQL_NUM);