将mysqli用户名显示为正确的大小写

Question

我有一个简单的成员表，当在页面上的php中输出时，总是显示为小写。

成员名称不是mysqli中的全部小写字母，但是当我使用

时

<?php echo $_SESSION['username'];?>

它们总是显示为小写字母..

以下是我正在使用的一些代码。

<?php
session_start(); 
require "config.php"; 
if(isset($_SESSION['username'])){ 
} 
if(isset($_POST['submit'])) 
{ 
   $user  = $_POST['user']; 
   $pass  = $_POST['pass']; 

   $user  = stripslashes($user); 
   $pass  = stripslashes($pass); 
   $user  = mysqli_real_escape_string($con, $user);
   $pass  = mysqli_real_escape_string($con, $pass);  
}
?>

$query = mysqli_query($con,"SELECT * FROM members WHERE username = '$user'") or die("Can not query the TABLE!"); 
$add = mysqli_query($con,"INSERT INTO members (id, username, password) VALUES (null, '$user' , '$pass') ") or die("Can't Insert! ");