<?php
include_once("functions/is_login.php");
session_start();
if(!is_login()){
	echo "请您登录系统后，再访问该页面！";
	return;
}

include_once("functions/database.php");
$title = $_POST["title"];
get_connection();
$resultSet = mysql_query("select * from category where title=$title");
if (mysql_num_rows($resultSet)) {
	$message = "该类别已存在！";
} else {
	$sql = "insert into category values(null,'$title')";
	mysql_query($sql);
}close_connection();		
header("Location:index.php?url=category_list.php&message=$message");
?>