Question

我正在尝试存储会话值并检查是否填写了字段，然后将表单函数返回到注册表单。

但是在下面的行中出现错误。

if(($_SESSION['name'] == '') && ($_SESSION['email'] == '') && ($_SESSION['phone'] == ''))

及以下是在表单页面中使用的完整php代码。

<?php 

session_start(); 

   if (isset($_POST['signup']))  
    {

    $_SESSION['name'] = $_POST['name'];
    $_SESSION['email'] = $_POST['email'];
    $_SESSION['phone'] = $_POST['phone'];
    }


    if(($_SESSION['name'] == '') && ($_SESSION['email'] == '') && ($_SESSION['phone'] == ''))
        {
        exit(); 
    }
    else
    {
        header('Location : signup-form.php');
        exit();     
    }



 ?>

Answer 1

这是最好的一个

<?php 

session_start(); 

   if (isset($_POST['signup']))  
    {

    $_SESSION['name'] = $_POST['name'];
    $_SESSION['email'] = $_POST['email'];
    $_SESSION['phone'] = $_POST['phone'];
    }


    if(!isset($_SESSION['name'])){ // if name is empty
        exit('Type your name.'); 
    }elseif(!isset($_SESSION['email'])){ // if email is empty
        exit('Type your email.'); 
    }elseif(!isset($_SESSION['phone'])){ // if phone number is empty
        exit('Type your phone.'); 
    }else{ // ohh look, they're all fine
        header('Location : signup-form.php');
        exit();     
    } 
 ?>

Answer 2

使用标题时从代码中删除空格，然后使用isset()检查该会话是否已设置

<?php 
 session_start(); 
   if (isset($_POST['signup']))  
    {

    $_SESSION['name'] = $_POST['name'];
    $_SESSION['email'] = $_POST['email'];
    $_SESSION['phone'] = $_POST['phone'];
    }
   if(!isset($_SESSION['name']) && !isset($_SESSION['email']) && !isset($_SESSION['phone']))
        {
        exit(); 
    }
    else
    {
        header('Location : signup-form.php');
        exit();     
    }
 ?>

Answer 3

您正在使用 isset()

设置之前检查SESSION

正确的方法是：

if(!isset($_SESSION['name']) && !isset($_SESSION['email']) && !isset($_SESSION['phone'])){
  exit();
}
else{
 //...
}

PHP会话表单提交条件

3 个答案: