Matching id's from two database tables to get username from one - php

Question

I am wanting to match my user_id column from my announcements table to the id column in my users table. I then want to get the username from the users table where the id's match.
I initially had the following query
if ($announcements_stmt = $con->prepare("SELECT * FROM announcements"))
I am getting the following error with my current code..
Warning: mysqli_stmt::bind_result(): Number of bind variables doesn't match number of fields in prepared statement in
Which I know what this means, but do I need to add in every column table from my users table for this to work or is there another way to do this? If I do need to add all of the columns as variables in my bind_result, does it matter which order I put them in? Announcements first or users or vise versa?
if ($announcements_stmt = $con->prepare("SELECT * FROM announcements
INNER JOIN users
ON announcements.user_id = users.id")) {
$announcements_stmt->execute();
$announcements_stmt->bind_result($announcements_id,
$announcements_user_id, $announcements_messages, $announcements_date);
if (!$announcements_stmt) {
throw new Exception($con->error);
}
$announcements_stmt->store_result();
$announcements_result = array();
?>
Current Announcements
<table>
<tr>
<th>ID</th>
<th>Username</th>
<th>Message</th>
<th>Date</th>
</tr>
<?php
while ($row = $announcements_stmt->fetch()) {
?>
<tr>
<td><?php echo $announcements_id; ?></td>
<td><?php echo $announcements_username; ?></td>
<td><?php echo $announcements_messages; ?></td>
<td><?php echo $announcements_date; ?></td>
</tr>
<?php
}
?>
}
update..
if ($announcements_stmt = $con->prepare("SELECT announcements.id, announcements.user_id, announcements.messages, announcements.date, users.username FROM announcements
INNER JOIN users
ON announcements.user_id = users.id")) {
$announcements_stmt->execute();
$announcements_stmt->bind_result($announcements_id,
$announcements_user_id, $announcements_messages, $announcements_date, $announcements_username);
if (!$announcements_stmt) {
throw new Exception($con->error);
}
$announcements_stmt->store_result();
$announcements_result = array();
?>
Current Announcements
<table>
<tr>
<th>ID</th>
<th>Username</th>
<th>Message</th>
<th>Date</th>
</tr>
<?php
while ($row = $announcements_stmt->fetch()) {
?>
<tr>
<td><?php echo $announcements_id; ?></td>
<td><?php echo $announcements_username; ?></td>
<td><?php echo $announcements_messages; ?></td>
<td><?php echo $announcements_date; ?></td>
</tr>
<?php
}
?>
}
</table>
<?php
}
}

Answer 1

The warning indicates when you are binding the result fields into variables, the number of variables does not match the number of fields in the result set:
$announcements_stmt->bind_result($announcements_id, $announcements_user_id, $announcements_messages, $announcements_date, $announcements_username);
The easy way around this is to always specify the fields in the SELECT statement (just an example):
SELECT t1.id, t1.user_id, t1.messages, t1.date, t2.username
Instead of:
SELECT *