Reducing MSQL Query to a specific session - php

Question

Using the code below, I was able to display each username and trial 1/0 flag in the table. What I want to do is display the data only for the existing user so I can say something like "Hello USERNAME, you have TRIAL access..." etc...
We're using standard HTACESS as the un/pass to enter the info area.
What needs to change here to only show the existing user's session?
<?PHP
$user_name = "blahblahblah";
$password = "blahblahblah";
$database = "blahblahblah";
$server = "127.0.0.1";
$db_handle = mysql_connect($server, $user_name, $password);
$db_found = mysql_select_db($database, $db_handle);
if ($db_found) {
$SQL = "SELECT * FROM member_auth";
$result = mysql_query($SQL);
while ( $db_field = mysql_fetch_array($result) ) {
print $db_field['username'] . " : ";
print $db_field['trial'] . " <br> ";
}
mysql_close($db_handle);
}
else {
print "Database NOT Found ";
mysql_close($db_handle);
}
?>

Answer 1

please don't use mysql_ functions.. look into PDO or MySQLi here: http://www.phptherightway.com/#databases
Update your query to only return specific user results.
Using Form POST:
$username = mysql_real_escape_string($_POST["username"]);
$password = mysql_real_escape_string($_POST["password"]);
Using URL Parameters:
$username = mysql_real_escape_string($_GET["username"]);
$password = mysql_real_escape_string($_GET["password"]);
So your SQL query will now look like:
$SQL = "SELECT * FROM member_auth WHERE username = '" . $username . "' AND password = '" . $password . "'";