在PHP MySQL中打印总行数困难吗？

Question

I'm trying to fetch 5 random followers of the current users. And then I'll fetch all the posted by the 5 random followers but I'm having trouble doing this. I want to print the total number of rows, but I'm getting individual rows posted by each follower.

<?php
mysql_connect("localhost","robin","mypassword");
mysql_select_db("my_db");

//Get list of posts to be paginated
$sql = mysql_query(
    "SELECT * FROM followers 
    WHERE being_followed = '".$_SESSION['username']."' LIMIT 5"
);

while($followers = mysql_fetch_array($sql)){
    $my_followers = $followers['follower_username'];
    $new_query    = mysql_query("SELECT * FROM posts WHERE poster = '$my_follower'");
    while($the_posts = mysql_fetch_array($new_query)){
        $total_posts = mysql_num_rows($new_query);
        $echo $total_posts;
        $poster = $the_posts['poster'];
        $the_post = $the_posts['the_post'];
        echo $poster;
        echo "<br>";
        echo $the_post;
        echo "<p>";
    }
}
?>

The above code print:

3 Robin
hi guys this is robin

3 Robin
I'm loving it

3 Robin
Where's he?

2 Sam going through changes

2 Sam where's da party 2nite

But that's not what I want. I simply want to print the total number of posts.
Please help me out guys.
Thanks in advance.

Answer 1

Try this:

$totalPosts = 0;
while($followers = mysql_fetch_array($sql)){
    $my_follower  = $followers['follower_username'];
    $new_query    = mysql_query("SELECT * FROM posts WHERE poster = '$my_follower'");
    $num_rows     = mysql_num_rows($new_query);
    $totalPosts   += $num_rows;
    echo $num_rows." ".$my_follower."<br/>";
}

echo $totalPosts ;

It will output something like:

3 Robin
2 Sam

Updated to include total number of posts