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Home Backend Development PHP Tutorial session无法传递,files保存可以,mysql保存却无法传递

session无法传递,files保存可以,mysql保存却无法传递

Jun 23, 2016 pm 01:49 PM
files mysql session transfer keep

将验证码保存在session,当用files来保存session的时候,用户注册的时候能在后台$_SESSION['captcha']读取到这个验证码,也就是说能正常传递,但是改为用mysql来保存session的时候,能正常储存session(在数据库里能看到有captcha的session值),在生成验证码的那个页面用$_SESSION['captcha']也是能读到那个值的,但是之后用户注册后台另一个页面却读取不到这个值,(也就是说不能传递了),很久之前都是可以的,现在发现居然不行了,有没有谁能想到是什么原因?


回复讨论(解决方案)

如果 session 用数据库保存,那么每个使用 session 的页面都必须加载相应的代码
你做到了吗?

这有个  session问题详解  可以看下   http://www.phpthinking.com/archives/318

如果 session 用数据库保存,那么每个使用 session 的页面都必须加载相应的代码
你做到了吗?



嗯嗯,每次要用session的时候都会
if (!isset($_SESSION)){
require_once __DIR__ . '/SessionHandler.php';
new \lib\SessionHandler();
}
SessionHandler.php文件里就有相应的代码,但问题还是其它页面读取不了session的值啊~

为防止意外情况出现
程序应无条件加载 SessionHandler.php
而实例化对象和 session_start() 都应在 SessionHandler.php 中进行
你还使用了命名空间,这就更需要注意排查新的故障点

为防止意外情况出现
程序应无条件加载 SessionHandler.php
而实例化对象和 session_start() 都应在 SessionHandler.php 中进行
你还使用了命名空间,这就更需要注意排查新的故障点



去掉条件引用以及去掉命名空间还是不行。
现在不说不同的页面,就算是同一个页面也读取不了,如下
error_log($_SESSION["captcha"]);
$_SESSION["captcha"] = $text;
第一句error_log($_SESSION["captcha"]);中的$_SESSION["captcha"]是想读取前一次存在数据库中的captcha 的值,此时数据库中是有值的,但是就是读不出来,显示“PHP Notice:  Undefined index: captcha”的错误,
我的SessionHandler类中的session_read函数是这样的:
function readSession($SID){
$query = "select value from sessioninfo where sid= :sid";
$stmt = $this->dbLink->prepare($query);
$stmt->bindParam(':sid', $SID);
if($stmt->execute())
{
$value = $stmt->fetch(\PDO::FETCH_ASSOC);
/*error_log('sid:'.$SID);*/
/*error_log('value:'.implode(',', $value));*/
if(!empty($value))
{
return $value;
}
}
}
上面注释掉的代码读取到的$value是有值的,也就是说php读取到了值但是没有反序列化到内存里?


为防止意外情况出现
程序应无条件加载 SessionHandler.php
而实例化对象和 session_start() 都应在 SessionHandler.php 中进行
你还使用了命名空间,这就更需要注意排查新的故障点



去掉条件引用以及去掉命名空间还是不行。
现在不说不同的页面,就算是同一个页面也读取不了,如下
error_log($_SESSION["captcha"]);
$_SESSION["captcha"] = $text;
第一句error_log($_SESSION["captcha"]);中的$_SESSION["captcha"]是想读取前一次存在数据库中的captcha 的值,此时数据库中是有值的,但是就是读不出来,显示“PHP Notice:  Undefined index: captcha”的错误,
我的SessionHandler类中的session_read函数是这样的:
function readSession($SID){
$query = "select value from sessioninfo where sid= :sid";
$stmt = $this->dbLink->prepare($query);
$stmt->bindParam(':sid', $SID);
if($stmt->execute())
{
$value = $stmt->fetch(\PDO::FETCH_ASSOC);
/*error_log('sid:'.$SID);*/
/*error_log('value:'.implode(',', $value));*/
if(!empty($value))
{
return $value;
}
}
}
上面注释掉的代码读取到的$value是有值的,也就是说php读取到了值但是没有反序列化到内存里?

原来问题果然是出现在这里的~
不应该return $value而是应该return $value['value'];
终于解决了~谢谢你们~

这有个  session问题详解  可以看下   http://www.phpthinking.com/archives/318



这片文章讲解得非常详细~好文章啊~


这有个  session问题详解  可以看下   http://www.phpthinking.com/archives/318



这片文章讲解得非常详细~好文章啊~  谢谢  希望多多支持下  我的个人博客  可以做个朋友 QQ 541578455
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