Fatal error: Function name must be a string in 请问怎么解决？？？急求解决的方法！！！！

<?php 
require "../inc/func.php";
$ip=$_SERVER("REMOTE_ADDR");
$adminName=$HTTP_POST_VARS["adminName"];
$adminPassword=md5($HTTP_POST_VARS["adminPassword"]);switch ($_SESSION["cip"]){
case $_SESSION["cip"]=="null" :
session_start();
session_register("cip");
$_SESSION["cip"]=$ip;
$_SESSION["i"]=0;
case $_SESSION["cip"]==$ip:
session_start();
session_register("cip");
$_SESSION["cip"]=$ip;
$_SESSION["i"]++;
case $_SESSION["cip"]>3:
echo("<script type='text/javascript'>alert ('sorry!您登入的次数超过3次,IP被锁!!');history.go(-1);</script>");
}
$sql="select adminName,adminPassword from partyAdmin where adminName='".$adminName."'&& adminPassword='".$adminPassword."'";
$result=mysql_query($sql);
if($result){
if($row=mysql_fetch_array($result))
{
session_register("admin");
$admin=$adminName;
echo ("<script   type='text/javascript'> alert('登入成功!!');location.href='all.htm' </script>");
}else {
echo ("<script type='text/javascript'> alert('用户名或密码有误,请重新输入!!'); location.href='../index.php'</script>");
 }
}
?>