PHP selected mysql data view as number

I'm selecting data from mysql database and print it in a webpage. I'm using wamp server. why I can't fetch the data ?

$result = mysql_query("SELECT userid FROM user WHERE logid = 'root'") or die(mysql_error());
echo $result; //result view as Resource id #7

but I count number of rows which equels to root it views as 1

$result = mysql_query("SELECT userid FROM user WHERE logid = 'root'") or die(mysql_error());
$no_of_rows = mysql_num_rows($result);
echo $no_of_rows; //result view as 1

Copyright License：
Author:「Dumindu Madushanka」,Reproduced under the CC 4.0 BY-SA copyright license with link to original source & disclaimer.
Link to：https://stackoverflow.com/questions/23455236/php-selected-mysql-data-view-as-number