我有以下脚本，如果用户一天没有访问该网站，它会创建一个cookie并更新数据库记录中的站点计数器，否则，它只会显示当前的访问次数。目前，每次我重新加载索引页时，cookie 都会显示 NULL，因此表格的更新次数超过了应有的水平。当包含此脚本时，如何维护索引页上的 cookie 值？
if (empty($_COOKIE["visits"])) {
// increment the counter in the database
mysql_query("UPDATE visit_counter ".
" SET counter = counter + 1 ".
" WHERE id = 1");
/* Query visit_counter table and assign counter
value to the $visitors variable */
$QueryResult = mysql_query("SELECT counter ".
" FROM visit_counter WHERE id = 1");
// Place query results into an associative array if there are any
if (($row = mysql_fetch_assoc($QueryResult)) !== FALSE) {
$visitors = $row['counter'];
} else {
// else if this is the first visitor set variable to 1
$visitors = 1;
}
// Set cookie value
setcookie("visits", $visitors, time()+(60*60*24));
} else {
$visitors = $_COOKIE["visits"];
}
cookie 脚本包含在索引文件中，因此以下是索引文件...
<?php include("Includes/cookie.php"); ?>
var_dump($_COOKIE["visits"]); /* Always returns NULL on this page but
returns the cookies real value if
run straight from cookie.php script */
/* Some main page content goes here */
/* The cookie value is echoed in the footer file that is included by
creating a statement that says echo "total visitors: ".$visitors; */
<?php include("Includes/footer.php"); ?>
问题出在set_cookie
从以下位置设置它：
<?php
// Set cookie value
setcookie("visits", $visitors, time()+(60*60*24));
?>
自
<?php
// Set cookie value
setcookie("visits", $visitors, time()+(60*60*24),'/'); // Define the cookie path to be used on this domain
?>
祝你好运