PHP: Left Join 2 table and print all records - php

Question

I have two table records in my database which look like this:
Table 1 with the column 1:
topic_id name
21 my computer
table 2 with columns as follows:
reply_id topic_id message
1 21 blabla
2 21 blue
In which the topic_id column in the table 2 is the foreign key of the table 1
I wanted to echo all replies in the table 2 along with the topic name (#21) in the table 1. So, I made the query like this
$q="SELECT name, message
FROM table1
LEFT JOIN table2
ON table1.topic_id = table2.topic_id
";
However, the result/ output returns the topic's name and ONLY ONE reply, but not 2 (or all) as expected. Did I miss something?
I used LEFT JOIN because some topics are still waiting for replies. In case that there is not any reply, the topic's name is still printed in browsers.
I also tried adding
GROUP BY table1.topic_id
but still NO LUCK!
Can you help? Thanks
EDIT: To clarify the question I add the php code to fetch records as follows:
As you know, The name needs to be printed only once. So, I code like this:
$tid = FALSE;
if(isset($_GET['qid']) && filter_var($_GET['qid'], FILTER_VALIDATE_INT, array('min_range'=>1) ) ){
// create the shorthand of the question ID:
$tid = $_GET['tid'];
// run query ($q) as shown above
$r = mysqli_query($dbc, $q) or die("MySQL error: " . mysqli_error($dbc) . "<hr>\nQuery: $q");
if (!(mysqli_num_rows($r) > 0) ){
$tid = FALSE; // valid topic id
}
}//isset($_GET['qid']
if ($tid) { //OK
$printtopic = FALSE; // flag variable to print topic once
while($content = mysqli_fetch_array($r, MYSQLI_ASSOC)){
if (!$printtopic) {
echo $content['name'];
$printtopic= TRUE;
}
}
} // end of $tid
// Print the messages if any:
echo $content['message'];

Answer 1

Try this with inner join
$q="SELECT name, message
FROM table1
INNER JOIN table2
ON table1.topic_id = table2.topic_id";

Answer 2

Try:
$q="SELECT table2.reply_id, table1.name, table2.message
FROM table2
LEFT JOIN table1
ON table1.topic_id = table2.topic_id
";

Answer 3

After struggling with this issue, I can find out that the problem is that I had to change the query to INNER JOIN and add the WHERE clause like this:
WHERE table2.reply_id = {the given topic_id}
Then it works well!
Sorry to disturb you all!