Parse Error on mysql_query

Hi, I'm beginning to learn PHP/MySQL, i have problem 'parse error' when using 'mysql_query' although it was simple code, like this : ===== 1 <?php 2 $host = localhost; 3 $user = root; 4 $pass = alpha; 5 $konek = mysql_connect("$host","$user","$pass"); 6 if (!$konek) { 7 die ('failed'.mysql_error()); 8 } 9 echo 'Connect'; 10 $dbname = testdb; 11 12 $db = mysql_select_db ("$dbname",$konek); 13 if (!$db) { 14 die ('not connect'.mysql_error()); 15 } 16 echo 'ok' 17 $query = mysql_query("select * from clients",$konek); 18 ? ====== Parse error: parse error, expecting ','' or ';'' in d:\www\test\refer1.php on line 17 Can anyone help me to explain this problem Thanks in advance