ใช้ if else ไม่ได้ครับ Parse error: syntax error, unexpected T_ELSE in

<?
include "connect.php";
$strSQL = "SELECT * FROM borrow ";
mysql_query("SET NAMES TIS620");
$objQuery = mysql_query($strSQL);

$dead = $objResult["Deadline"];
$d = date('d-m-Y');
$n = -7;
$u = 5;
$t = -$dead - -$d ; //ใส่ลบไว้ข้างหน้า
$t2 = $t - $n;
$t3 = $t2 * $u;

	 if ($t >="8");
	 {
	 echo "$t3"; 
	 } 
	 else (  $t <="7");
	 {
	 echo ""; 
	 } 
?>