Get last entry in MYSQL database table using PHP - php

Question

I know this question has been asked multiple times on here but each one is a little different.
I have a table in my database with the columns entry_id(INT- Auto_Increment), user_id(INT), firstname(VARCHAR), lastname(VARCHAR) and comment(VARCHAR).
My script is pretty much a very basic timesheet I have tried creating, the user_id, firstname and lastnames are set when the user visits the script. So what I need to do is check the last comment cell for that user to see if the comment is either "in" or "out".
Whenever I try building my query and checking if the last comment in that users field is either in or out, I visit my script and it doesn't print the comment, what am I doing wrong?
$userid = $_SESSION['user_id'];
$query = mysqli_query($mysqli, "SELECT entry_id, user_id FROM timesheet WHERE user_id = '$userid' ORDER BY entry_id DESC LIMIT 1") or die('Error: ' . mysqli_error($mysqli));
if(mysqli_num_rows($query)>0){
while ($row = mysqli_fetch_array($query, MYSQL_ASSOC)) {
echo '<pre>';
print_r($row);
echo '</pre>';
$clock = $row['comment'];
echo $clock . ' Last entry';
}
Couple of notes:
I AM connected to the database and get a simple query to work.
The userid session is set.
Prior to asking this question I looked at the answers here and here.
Here is what $row is printing, notice how comment is empty although I know I have a value in the database.
Array
(
[entry_id] => 4
[user_id] => 3
[comment] =>
)

Answer 1

Just as you seen on comments, you trying to access an index which is not included with the one you queried that's why you dont get any results.
$userid = $_SESSION['user_id'];
$query = mysqli_query($mysqli,
"SELECT
entry_id,
user_id,
comment <-- you're trying to access comments, but didn't include that column in the query
FROM timesheet
WHERE user_id = '$userid' ORDER BY entry_id DESC LIMIT 1")
or die('Error: ' . mysqli_error($mysqli));
if(mysqli_num_rows($query) > 0){
while ($row = mysqli_fetch_assoc($query)) {
echo $row['comment'] . ' Last entry <br/>';
}
}
If you've had turn on error reporting:
error_reporting(E_ALL);
ini_set('display_errors', '1');
You should have seen that undefined index comment.