How to get session variable from 2 different tables? - php

Question

I am new in PHP. I use session first time. I have two tables in db. First table with name pacra_teams with column id and title. Second table is og_users with multiple column but i use team_title as foreign key as store id against team title.
Now i want to create a session and want to display team name from table pacra_teams and user name from table og_users.
I try following code but i failed.
<?php
// starts session
session_start();
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "pacra1";
$conn = new mysqli($servername, $username, $password, $dbname);
$sql="SELECT *
FROM og_users
LEFT JOIN pacra_teams
ON og_users.id = pacra_teams.id
LIMIT 1
";
// setting variable values during session
$_SESSION['og_users.username']=$username;
$_SESSION['pacra_teams.title']=$title;
?>
call these variables
<?php
session_start();
?>
<?php
print_r($_SESSION);
?>
Please help me how i can do this?
One Thing More. if i run seesion.php page it display undefine variable "title"
and if i run print code. It display username "root" but i dont have any user name root in my db

Answer 1

You already defined a query but didn't execute it.
// starts session
session_start();
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "pacra1";
$conn = new mysqli($servername, $username, $password, $dbname);
$sql="SELECT *
FROM og_users
LEFT JOIN pacra_teams
ON og_users.id = pacra_teams.id
LIMIT 1
";
$result = $conn->query($sql);
$row = $result->fetch_object();
// setting variable values during session
$_SESSION['og_users.username'] = $row->USER_NAME; // Change to correct column name in table og_users
$_SESSION['pacra_teams.title'] = $row->TITLE_COLUMN_NAME; // Change to correct column name in table pacra_teams

Answer 2

The result will be the same every time without a WHERE clause in your sql statement. It's only going to return the first row it finds. It looks like you're trying to set user information in a session variable so you can call the data throughout your application so here's a possible solution assuming you grab an ID for the user somewhere (IE web form).
This is a simple answer to explain a concept, not a tutorial.
<?php
//Setup your connection stuff here
session_start();
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "pacra1";
//Get a user's name from a form
$userName = $_POST['username'];
// Perform your query
$db= new mysqli($servername, $username, $password, $dbname);
$sql = "SELECT *
FROM og_users
LEFT JOIN pacra_teams
ON og_users.id = pacra_teams.id
WHERE og_users.username = {$userName} LIMIT 1";
if(!$result = $db->query($sql)){
die('Error [' . $db->error . ']');
}
// Setting variable values during session
while($row = $result->fetch_assoc()) {
$_SESSION['ogUsername'] = $row['USERNAME']; // USERNAME is a placeholder for the example
$_SESSION['pacraTeamsTitle'] = $row['TITLE']; // Same here
}
It's not perfect, but hopefully it helps explain the concept and helps you complete your task.