Question

我正在使用登录系统。我的登录表单发布到check.php。

如果用户详细信息不正确，我试图编写一个函数来测试失败的登录尝试次数。

<?php
//from check.php
if (blah)
{
    $_SESSION['error'] = "<strong>Details not correct.</strong> Please try again.";     
    //$_SESSION['email'] = $email;
    $_SESSION['attempts'] = 1; //first attempt
    if(isset($_SESSION['attempts']))
    {
        $_SESSION['fail'] = $_SESSION['attempts']++; //increment
    }
    //$_SESSION['fail'] is echo'd on my login form 
}

Answer 1

此代码除逻辑外没有错误。

如果以下代码在任何函数内。然后，显然它会在递增到2后停止。因为，$_SESSION['attempts']在每个函数调用中都设置为1。您必须在该函数调用之前设置$_SESSION['attempts'] = 1。

<?php
if (blah)
{
    $_SESSION['error'] = "<strong>Details not correct.</strong> Please try again.";
    if(isset($_SESSION['attempts']))
    {
          $_SESSION['fail'] = $_SESSION['attempts']++; //increment
    }
}

登录表单发布到check.php，其中包含该功能如果生成错误，反过来又会重定向回登录表单。 〜@ user3464091

如果是那个场景，那么请修改我的代码。

解释：在这种情况下，每次提交登录凭据后，它都会进入此功能。并且，如果已定义$_SESSION['attempts']。然后，它将增加到1.并且，如果未设置$_SESSION['attempts']。然后，它将初始化为1。

[注意：成功登录后不要忘记unset($_SESSION['attempts']);。]

<?php
if (blah)
{
  $_SESSION['error'] = "<strong>Details not correct.</strong> Please try again.";
  if(isset($_SESSION['attempts']))
  {
        $_SESSION['fail'] = $_SESSION['attempts']++; //increment
  } else {
        $_SESSION['attempts'] = 1;
  }
}

Answer 2

删除$ _SESSION [＆＃39;尝试＆＃39;] = 1;在你的if条件之前

它应该是这样的......

if(isset($_SESSION['attempts'])) { $_SESSION['fail'] = ++$_SESSION['attempts']; } else { $_SESSION['attempts'] = 1; }

Answer 3

你可以使用：

简单地增加它

$_SESSION['fail']= $_SESSION['attempts']+1;

它遇到的问题是它首先定义会话变量然后执行程序。因此，除非尚未设置变量，否则请确保不设置变量。

那是：

if(!isset($_SESSION['attempts'])) { $_SESSION['attempts']=1;}

然后继续代码。

Answer 4

在将会话值存储在变量中之后，您将会话值递增。改变

$_SESSION['fail'] = $_SESSION['attempts']++;

到

$_SESSION['fail'] = ++$_SESSION['attempts'];

此外，在$_SESSION['attempts']存储失败的尝试，否则它不会超过2。

$_SESSION['attempts'] = $_SESSION['fail'];

Answer 5

使用代码就像

一样

//from check.php
if (blah)
{
    $_SESSION['error'] = "<strong>Details not correct.</strong> Please try again.";     
    //$_SESSION['email'] = $email;

    if(!isset($_SESSION['attempts']))
    {
        $_SESSION['attempts'] = 1; //first attempt
    }
    else
    {
       $_SESSION['attempts']++; //increment
    }
    $_SESSION['fail'] = $_SESSION['attempts'];

//$_SESSION['fail'] is echo'd on my login form 
}

Answer 6

<?php 
if (blah)
{
$_SESSION['error'] = "<strong>Details not correct.</strong> Please try again.";     
//$_SESSION['email'] = $email;

if(isset($_SESSION['attempts'])) // check session attempts exist
{
    $_SESSION['fail'] = $_SESSION['attempts']++; //session exist so do increment
}
else
{
    $_SESSION['attempts'] = 1; //  session attempts not exist condition so make first attempt
}


//$_SESSION['fail'] is echo'd on my login form 
}

如何在php中增加会话值

6 个答案: