Question

突然$ _SESSION [“用户名”];从登录屏幕发送，在：

    session_start();
    $_SESSION["username"]=$username;
    echo $username;
    echo $_SESSION["username"]; // THESE 2 ECHOes WORK

在索引中：

    <?php
    session_start();
    echo $_SESSION["username"];
    // THIS ECHO IS BLANK ALREADY TRIED IT WIWH OTHER ECHOES THE PAGE WORKS
     ?>

Answer 1

你的来电session_start();太多次了。尝试简单检查会话是否已启动例如：

// start session if not session_id not present
    if(session_id()=='') session_start();

您还可以检查是否有会话变量：

if(isset($_SESSION['username']) && $_SESSION['username'] !== "") // this checks if its set and does not equal nothing
{
  //do your code
}
else
{
  //reset $_SESSION['username'];
}

$ _SESSION [“username”]不打印任何内容

1 个答案: