Create list from mysql query - php

Question

I have a feeling this is really simple. Here's the deal: I have a table with three columns. I want to take all the values in one of the columns and turn that into a list. I want to do this so I can transverse through the list. Each value in the list corresponds to a username. I want to take that username to access info about a user. Using this info, I can check which faculty the user is in and sort accordingly. This is what I've come up with:
function get_users_by_faculty($faculty) {
global $connection;
$query = "SELECT * FROM owner";
$user_set = mysql_query($query); // ERROR could not establish link to server
confirm_query($user_set);
foreach($user_set as $user) { //ERROR invalid argument
$userFaculty = get_info_by_id($user["ownerId"], "ou");
if($faculty == $userFaculty){
return $user["name"];
} else {
return NULL;
}
}
I've been quite stuck on this for a few hours.

Answer 1

I don't know your fields names, but I think you could do that with an sql query.
something like that :
SELECT user.id,user.name, faculty.name
FROM user inner join faculty on faculty.id = user.faculty_id
WHERE faculty.id=?
You should replace ? with your faculty id.
If you want a list of user names, you can use group concat :
SELECT GROUP_CONCAT(user.name SEPARATOR ';')
FROM user inner join faculty on faculty.id = user.faculty_id
WHERE faculty.id=?
GROUP BY faculty.id