PHP code is not showing OutPut. It showing code in index.php

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Javascript

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PHP

I am trying to showing news scroling in Index.php but, I am showing the code in my page. Very funny.
Code:

<?
                                          
$query="select * from newsroom order by nwsroom_date desc limit 0,4";

$res=mysql_query($query);

while($row=mysql_fetch_object($res)){
$e_dat1=$row->nwsroom_date;
list($year, $month, $day) = preg_split('/[: -]/', $e_dat1);
//list ($year, $month, $day) = split ('[-./]', $e_dat1);
$e_dat=$month."-".$day."-".$year;

$homenews .='<a class=news href=news_detail.php?nid='.$row->newsroom_id.'>'.$row->nwsroom_title.'</a><br>'.$e_dat.'<br><br>';
 }
?>

Please, help me how can I do it ?
Thank you