PHP页面未发布且if语句已损坏

<?php
            $srver = $_GET['S'];
            $fnum = $_GET['F'];
            if ($srver == '')($connect = odbc_connect('van' ,'user' , 'password'));
            if ($srver == '')   {$other_srvr = 'T' ; $other = 'Toronto';}
            if ($srver == 'V') ($connect = odbc_connect('van' ,'user' , 'password'));
            if ($srver == 'V')  {$other_srvr = 'T' ; $other = 'Toronto';}
            if ($srver == 'T') ($connect = odbc_connect("tor" ,"user" , "password"));
            if ($srver == 'T')  {$other_srvr = 'V' ; $other = 'Vancouver';}
            if ($fnum == '')    {$Fnumber = '&F=' ;}
            echo "<form method='post' action=$PHP_SELF> ";
            echo "<a href='mypage.php?S=$other_srvr$Fnumber'>Change Server to $other</a>" ;
            echo "<br>";
            echo "<strong> Filter Number : </strong><input name='F' type='text' size='20'>";
            echo" <input type='submit' name='submit' value='Search' />"; # Create submit button
            echo "</form>"; 
            $sum = array();
            if (isset($_POST['submit'])) 
                    {

                        $r = "1" ; 
                    }
            else
                    {                   

                    $query = Select abc from table;

                    }

                    odbc_close($connect);
?>

So this is my code. The problem is how do i get the page to submit it just refreshes. Can someone please explain and secondly i am checking for server with if statements on top, is there to way to do that in single line. I cant seem to find it to work.

Thanks

if ($srver == '')($connect = should be if ($srver == ''){$connect =... and so on, curly braces and whatnot.

First off, if $PHP_SELF somehow worked, it's not in "". Second, you need to look up how use SQL with PHP. Something like this maybe?

$query = mysql_query("SELECT abc FROM table");