$arr = [1, 4, 3, 3, 3, 4, 4, 4];
$maxCount = [];
$len = count($arr);
$zhongshu = '';
for($i=0; $i<$len; $i++)
{
    $count = 0;
    for($j=0; $j<$len; $j++)
    {
        if($arr[$i] == $arr[$j])
        {
            $count++;
            $maxCount[$arr[$i]] = $count ; 
        }
    }
}


$cishu
 
 = max($maxCount);
if($cishu > 1 )
{
    foreach($maxCount as $k => $v)
    {
        if($v == $cishu)
        {
            $zhongshu = $k;
        }

    }
}else
{
    $zhongshu = '無眾數';
    $cishu = '值出現的個數都唯一！';
}

echo '<pre>';
print_r($maxCount);
echo '</pre>';
echo '<br />'
 
.'眾數：' . $zhongshu . '<br />';
echo '<br />'.'出現次數：' . $cishu ;