Question

我真的无法弄清楚为什么这不起作用。我想将存储在php会话变量中的内容显示为输入字段中的值。

<?php
    if($_SESSION['id'])
          echo ' <input type="text" value="'.$_SESSION['friday'].'"></input>'; ?>

提前致谢！

更新：在我的登录页面index.php，我开始会话并为它们分配值。

$row = mysql_fetch_assoc(mysql_query("
        SELECT * 
        FROM knine_settings_login, knine_school_db, knine_class_db 
        WHERE usr='{$_POST['username']}' AND pass='".md5($_POST['password'])."' AND knine_settings_login.School = knine_school_db.School AND knine_settings_login.ClassID = knine_class_db.ClassID AND knine_class_db.week = 0
        "));

        if($row['usr'])
        {
            // If everything is OK login

            $_SESSION['usr']=$row['usr'];
            $_SESSION['id'] = $row['id'];
            $_SESSION['homework'] = $row['homework']; 
            $_SESSION['pe'] = $row['pe'];
            $_SESSION['pm'] = $row['pm'];
            $_SESSION['pc'] = $row['pc'];
            $_SESSION['School'] = $row['School'];
            $_SESSION['Class'] = $row['Class'];
            $_SESSION['level'] = $row['level'];
            $_SESSION['rememberMe'] = $_POST['rememberMe'];
            $_SESSION['schoolurl'] = $row['schoolurl'];
            $_SESSION['monday']=$row['monday'];
            $_SESSION['tuesday'] = $row['tuesday'];
            $_SESSION['wednesday'] = $row['wednesday'];
            $_SESSION['thursday'] = $row['thursday'];
            $_SESSION['friday'] = $row['friday'];
            $_SESSION['peone'] = $row['peone'];
            $_SESSION['petwo'] = $row['petwo'];

Answer 1

Session在使用之前需要先启动它。试试吧。

<?php
    session_start();
    if(isset($_SESSION['id']))
    echo '<input type="text" value="'.$_SESSION['friday'].'"></input>'; 
?>

Answer 2

确保在回显任何session_start()数据之前调用了$_SESSION。

<?php
session_start();

if ($_SESSION['id']) {
    echo ' <input type="text" value="'.$_SESSION['friday'].'"></input>';
}
?>

Answer 3

<?php
// Start the session on every page at the top first
session_start();
?>
<!DOCTYPE html>
<html>
<body>

<?php
// Set session variables
$_SESSION["animals"] = "dog";
$_SESSION["cars"] = "ford";
echo ' <input type="text" value="'.$_SESSION['animals'].'"></input>';
?>

将php会话设置为html输入值

3 个答案: