Question

我遇到设置session_set_save_handler的问题。我将php.ini配置为session.handler = user

这个简单的测试失败了：

//Define custom session handler
if(session_set_save_handler("sess_open", "sess_close", "sess_read", "sess_write",     "sess_destroy", "sess_gc")){
die('set fine');
}else{
die('Couldn\'t set session handler');

这是我的会话课。

//Constructor
function __construct(){

//Define custom session handler
if(session_set_save_handler("sess_open", "sess_close", "sess_read", "sess_write", "sess_destroy", "sess_gc")){
    die('set fine');
}else{
    die('Couldn\'t set session handler');
}

//Start session
session_start();
}


//Custom session functions
function sess_open($sess_path, $sess_name) {

return true;
}

function sess_close() {

return true;
}

function sess_read($sess_id) {

//Query for session record in
$results = $db->QuerySingleRow("SELECT data FROM sessions WHERE session_id = '$sess_id'");

//Check that record is returned
if ($results != false)
{
    //Session found, pull out data field value
    $sess_data = $results->data;

    //Grab current time
    $CurrentTime = time();

    //Update session record with current timestamp
    $db->Query("UPDATE sessions SET last_updated = $CurrentTime WHERE session_id = '$sess_id'");

    //Return 
    return $sess_data;
}
else
{
    //No session found

    //Grab current timestamp
    $CurrentTime = time();

    //Insert new session to DB
    $db->Query("INSERT INTO sessions (session_id, last_updated) VALUES ('$sess_id', $CurrentTime)");

    //Return blank per nature of session_set_save_handler read()
    return '';
}
}

function sess_write($sess_id, $data) {

//Grab current timestamp
$CurrentTime = time();

//Update session record to hold new data and update last_updated field
$db->Query("UPDATE sessions SET data = '$data', last_updated = $CurrentTime WHERE session_id = '$sess_id'");

return true;
}

function sess_destroy($sess_id) {

//Delete session from DB
$db->Query("DELETE FROM sessions WHERE session_id = '$sess_id'");

return true;
}

function sess_gc($sess_maxlifetime) {

//Get current timestamp
$CurrentTime = time();

//Delete from session based on garbage collection
$db->Query("DELETE FROM sessions WHERE last_updated < $CurrentTime");

return true;
}


}

我唯一能想到的是$ db假设是我的MySQL DB类的一个对象，但我不能包含该类，然后创建它的实例。

我不想重新发明数据库类，所以我从杰夫威廉姆斯那里抓住它：http://www.phpclasses.org/package/3698-PHP-MySQL-database-access-wrapper.html

我已经尝试将它包含在类体内放置然后页面不呈现，只是空白页面没有错误。：

<?php
include 'mysql.class.php';
$db = new MySQL(true);

class session
{

//Constructor
function __construct(){
....

Answer 1

设置会话保存处理程序失败：

session_set_save_handler("sess_open", "sess_close", "sess_read", "sess_write", "sess_destroy", "sess_gc")

因为您要注册的这些回调不存在：

var_dump(is_callable("sess_open")); # FALSE

这是因为您的对象方法需要正确注册为回调。对象方法回调以具有两个元素的数组的形式写入，第一个是对象，第二个是方法名的字符串。来自PHP net的示例与您的类似：

$handler = new FileSessionHandler();
session_set_save_handler(
    array($handler, 'open'),
    array($handler, 'close'),
    array($handler, 'read'),
    array($handler, 'write'),
    array($handler, 'destroy'),
    array($handler, 'gc')
);

如您所见，每个方法都被编写为单个数组，第一个元素始终为$handler。

在课程中，您可以使用$this来引用同一个对象。但在您完全自己编写之前，请查看session_set_save_handler() PHP manual page的信息，示例和用户提供的注释。您可以通过不同的方式为您的案例进行组织。

Answer 2

如果您在构造函数中使用该函数，那么您需要传递$this，如下所示：

session_set_save_handler(
    array($this, 'sess_open'),
    array($this, 'sess_close'),
    array($this, 'sess_read'), 
    array($this, 'sess_write'),
    array($this, 'sess_destroy'),
    array($this, 'sess_gc')
);

然后实例化类

new SessionClass;

如果您有疑问，可以随时查看the documentation。一定要阅读评论;他们通常非常有帮助。

Session_set_save_handler未设置

2 个答案: