Question

我写了一个全新的脚本来将我的会话存储在数据库中，一切似乎都在起作用。出于某种原因，每当我打开页面时，会话变量就会消失。

我假设这与我使用session_start（）;当我使用session_start（$ session_id）时，在页面顶部;在我的脚本上启动会话。这会重置session_id吗？

这是设置变量/会话

的主要php脚本

<?php 
    session_start();
    include($_SERVER['DOCUMENT_ROOT']. '/../db_connect.php');
    if (!Isset($_SESSION['crecketgaming_usergroup'])){
        $_SESSION['crecketgaming_usergroup'] = "Guest";
    }
    try {
        $conn = new PDO("mysql:host=$servername:3307;dbname=$dbname", $username, $password);
    }catch(PDOException $e){
        echo "Connection failed: " . $e->getMessage();
    }

    onLoad($conn);
    function onLoad($conn){
        $session_id = "";
        if(isset($_COOKIE['Crecketgaming_sessionid'])){
            $time = time();
            $session_id = $_COOKIE['Crecketgaming_sessionid'];
            $addrip = $_SERVER['REMOTE_ADDR'];
            $sql = "SELECT * FROM sessions WHERE session_id = :sessionid AND ip = :addrip"; 
            $sth = $conn->prepare($sql);
            $sth->bindParam(':sessionid', $session_id, PDO::PARAM_STR);
            $sth->bindParam(':addrip', $addrip, PDO::PARAM_STR);
            if($sth->execute()){
            }else{
                echo "error";
            }
            $rowcount = $sth->rowCount();
            $row = $sth->fetch();   
            $userid = $row['user_id'];  
            //echo $row['user_id'];
            if ($rowcount > 0) {
            } else {
                $session_id = storeUID($conn);
            }
        } else {
            $session_id = storeUID($conn);
        }
        if($session_id !== "") {
            if($userid === NULL){
            }else{
                //echo $userid;
                setSessionDetails($conn, $userid);
            }
        }
    }

    function storeUID($conn){

        $addrip = $_SERVER['REMOTE_ADDR'];
        $session_id = createUID(100);
        $time = time();
        if(setcookie("Crecketgaming_sessionid", $session_id, mktime(). time()+60*60*24*30)){
            $agent = $_SERVER['HTTP_USER_AGENT']; 
            $ip = $ip = $_SERVER['REMOTE_ADDR'];
            $sql = "INSERT INTO sessions (session_id, ip, time) VALUES (:sessionid, :addrip, :time)";
            $sth = $conn->prepare($sql);
            $sth->bindParam(':sessionid', $session_id, PDO::PARAM_STR);
            $sth->bindParam(':addrip', $addrip, PDO::PARAM_STR);
            $sth->bindParam(':time', $time, PDO::PARAM_INT);
            $sth->execute();
        }
        return $session_id;
        session_start($session_id);
    }

    function createUID($length) {
        $chars = "abcdefghijkmnopqrstuvwxyz0123456789"; 
        srand((double)microtime()*1000000); 
        $i = 0; 
        $pass = '' ;
        while ($i < $length) { 
            $num = rand() % 33; 
            $tmp = substr($chars, $num, 1); 
            $pass = $pass . $tmp; 
            $i++; 
        }
        return $pass;
    }

    function setSessionDetails($conn, $userid) {
        session_start($session_id);
        session_id($session_id);
        $sql = "SELECT * FROM users WHERE user_ID = :user_ID";
        $sth = $conn->prepare($sql);
        $sth->bindParam(':user_ID', $userid);
        $sth->execute();
        $row = $sth->fetch();   
        $_SESSION['crecketgaming_usergroup'] = $row['Usergroup'];

        $_SESSION['crecketgaming_username'] = $row['Username'];

        $_SESSION['crecketgaming_userid'] = $row['user_ID'];

    }   
?>

例如，在我的索引页面的顶部，这是我唯一的PHP代码：

<?php
    session_start();
    include($_SERVER['DOCUMENT_ROOT']. '/../db_connect.php');
    include($_SERVER['DOCUMENT_ROOT']. '/includes/page_load.php');
    include($_SERVER['DOCUMENT_ROOT']. '/includes/check_session.php');
?>

这在页面顶部调用。 db_connect包含我对服务器的连接详细信息，page_load计算ip地址刷新页面的次数，check_session是上面显示的文件。

我检查过，如果我把

echo $_SESSION['crecketgaming_userid']; //outputs "1"
echo $_SESSION['crecketgaming_usename '];  //outputs "crecket"
exit;

在check_session.php的底部，它显示了id 1。但是在索引页面或任何页面上，它们都是空的，好像没有人登录一样。

所以我的问题是session_start（）;像我一样删除以前的会话。我读到它启动或恢复会话但我从未见过有关会话ID的任何内容。

我对php有点新鲜，所以如果有人在任何地方看到改进的地方请告诉我。

Answer 1

尝试更改：

$_COOKIE

到

$_SESSION

Answer 2

我在启动之后设置了session_id（）。我所要做的只是交换这两个：

session_id($session_id);
session_start();

打开新页面时会话变量重置

2 个答案: