Select Data From a Database Table with PHP Mysql

$con = mysql_connect("localhost","peter","abc123");
if (!$con)
{ die('Could not connect: ' . mysql_error());
}
mysql_select_db("my_db", $con);
$result = mysql_query("SELECT * FROM person");
while($row = mysql_fetch_array($result))
{
echo $row['FirstName'] . " " . $row['LastName'];
}
mysql_close($con);