PHP数据库链接代码

 <?php$mydbhost ="localhost"; //配置主机$mydbuser ="root"; //数据库用户$mydbpw ="8312836"; //数据库密码$mydbname ="jingyun"; //数据库名//$mydbcharset ="GBK";$conn=mysql_connect($mydbhost,$mydbuser,$mydbpw) or die ("服务器连接错误".mysql_error());mysql_select_db($mydbname,$conn);mysql_query("SET NAMES 'utf8'");date_default_timezone_set ('PRC'); $addtime=date("y-m-d H:i:s");//定义常量define('ALL_PS',"nkfwe24tot");//二次加密，密码字符//echo md5("admin".ALL_PS);//信息提示函数function showmsg($text,$urlstr="") { if($urlstr){ echo '<Script>alert("'.$text.'");window.location.href="'.$urlstr.'";</Script>'; exit; } else { echo "<Script>alert('".$text."');history.go(-1);</Script>"; exit; } }?>