如果多个只显示一次，则尝试在表中显示所有不同的用户名

Question

I am trying to display all the usernames in a table however if there is multiple of the same user only display once. It currently works on the first row in the database but doesn't work on the other users in the table

<?php 
$sql = " SELECT * FROM messages WHERE reciever = '".$_SESSION['name']."' LIMIT 1 ";
$mes = $pdo->query($sql);

while($mess = $mes->fetch())
{
?>         
<li><?php echo " ".$mess['sender']." <a href='my-messages.php?sender=".$mess['sender'] ."' > View</a> " ?></li>                   

<?php } ?>

Answer 1

您想使用Select DISTINCT

SELECT DISTINCT SENDER FROM messages WHERE reciever = '".$_SESSION['name']."'