Display particular loggedin user name - php

Question

I want to display the particular username after login successful. by using session I am calling my username. But it is displaying all user names.
Please give suggestion to display only particular username.
Here is my code.
In session :
$_SESSION ['admin_name'] = $row['name'];
$admin_name = $_SESSION['admin_name'];
Inserting in to DB :
$sql = "INSERT INTO account_info (name)
VALUES ( '$admin_name')";
Displaying :
<?php
$count = 1;
$sel_query = "Select * from account_info ORDER BY id;";
$result = mysql_query($sel_query);
while ($row = mysql_fetch_assoc($result)) {
?>
<td align="left"><?php echo $row["name"]; ?></td>
<?php
$count++;
}
?>
I think while displaying I need to filter name. Please reply to me anybody knows how to filter.
Update:

Answer 1

You should re-approach this as it's poor design, but to get what you want to achieve:
while($row = mysql_fetch_assoc($result)) {
if($row['name'] == $_SESSION['admin_name']) {
...
}
}
Or even better...
$sel_query="Select name from account_info WHERE name = '$admin_name'";

Answer 2

$sel_query="Select * from account_info WHERE name = '$admin_name' ";

Answer 3

You don't need to save session values into database to show it after login successful.
Only store it into session array like this:
$_SESSION['user_name'] = $row['name'];
and in login page check this session array is set or not.If set then display it
like:
if(isset($_SESSION['user_name'])) { echo $_SESSION['user_name']; }

Answer 4

You are getting the all username because of this query:
Select * from account_info ORDER BY id;
This will return all user data, you need to add username in WHERE clause for particular user as:
Select * from account_info WHERE name = '$admin_name';
More important, i didn't see session_start() function in your code, don't forgot to use this, otherwise you can't get the $_SESSION values.
Other important thing, your code is open for SQL Injection, you can use Prepared Statement for preventing SQL Attack. This will help you: How can I prevent SQL injection in PHP?
Very Special point, mysql_* is deprecated and closed in PHP 7.
Side Notes:
In your current query, no need to use ORDER BY id because when you use WHERE for particular user this part should be useless here.
Don't know, where are you using $count++; in your requirement, you need to print only particular user data so this is also useless here.