Вывод с ограничением

$query = mysqli_query($connect, "select * from `ls` where `sender` = $_cookie[user] or `receiver` = $_cookie[user] order by `date` desc");
while ($row = mysqli_fetch_assoc($query)) {
if ($row['sender'] == $_cookie[user]) { echo $row['receiver']; } else { echo $row['sender']; }
}

$query = mysqli_query($connect, "select * from `ls` where `sender` = $_cookie[user] or `receiver` = $_cookie[user] order by `date` desc");
$contacts = array();
while ($row = mysqli_fetch_assoc($query)) {
if ($row['sender'] == $_cookie[user]) {
if (!in_array($row['receiver'],$contacts)) $contacts[] = $row['receiver'];
} else {
if (!in_array($row['sender'],$contacts)) $contacts[] = $row['sender'];
}
}
$i=1;
foreach($contacts as $item)
{
if ($i>1) echo ", ";
echo $item;
$i++;
}

$query = mysqli_query($connect, "select * from `ls` where `sender` = $_cookie[user] or `receiver` = $_cookie[user] order by `date` desc");
$contacts = array();
while ($row = mysqli_fetch_assoc($query)) {
if ($row['sender'] == $_cookie[user]) {
if (!in_array($row['receiver'],$contacts)) $contacts[] = $row['receiver'];
} else {
if (!in_array($row['sender'],$contacts)) $contacts[] = $row['sender'];
}
}
$i=1;
foreach($contacts as $item)
{
if ($i>=1) echo ", ";
echo $item;
$i++;
}