php连接mysql数据库连接测试文件

<?php   define("RelativePath", ".");  include_once(RelativePath."/DB_mysql.class.php"); # DB_mysql.class.php 在我的资源里面   $db_mysql = new DB_mysql();  $db_mysql->set_values("localhost","***","***","***");  # eg: "localhost","root","","test"  # eg: "localhost或远程IP地址","root","","test"  $link = mysql_connect($db_mysql->mysql_remote_db_host,$db_mysql->mysql_remote_db_username,$db_mysql->mysql_remote_db_password);  if(!$link){    die("Not connectted:".mysql_error($link));  }  $db_selected = mysql_select_db($db_mysql->mysql_remote_db_name,$link);  if(!$db_selected){    die("Can't use ".$db_mysql->mysql_remote_db_name." "."错误提示为"." ".mysql_error($db_selected));  }  /*  else{    echo "已经成功选择:"." ".$db_mysql->mysql_remote_db_name;  }  */  $sql = "select user_id,user_email from user_info limit 100";  $query = mysql_query($sql,$link);   if(!$query){    die(mysql_error($query));  }  else{    # $num_rows = mysql_num_rows($query);# echo $num_rows;echo mysql_num_rows($query); # the result is 100  }    ?>