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
  }    
?>