错误：本地主机重定向您太​​多次

Question

您好，我是一名新学生，开始专门学习 PHP 的编码/编程。我尝试学习了一些代码，我遇到了这个问题。

此页面无法正常工作

localhost 重定向您的次数过多。 尝试清除您的 cookie。 ERR_TOO_MANY_REDIRECTS

这是我的代码：

session_start();

include('_includes/config.php');
include('_includes/db.php');

    if(isset($_POST['register'])){
        $_SESSION['uname'] = $_POST['uname'];
        $_SESSION['fname'] = $_POST['fname'];
        $_SESSION['lname'] = $_POST['lname'];
        $_SESSION['email'] = $_POST['email'];
        $_SESSION['address'] = $_POST['address'];
        $_SESSION['postal'] = $_POST['postal'];
        $_SESSION['pass'] = $_POST['pass'];
        $_SESSION['con-pass'] = $_POST['con-pass'];
    }

    if(strlen($_POST['uname'])<3){
        header("Location:register.php?err=" . urlencode("The username must be at least 3 characters long"));
        die();
    }

我真的不知道该怎么办我在php中遇到了一些错误但我还没有遇到过这种错误请帮助并请告诉我我做错了什么。

Answer 1

检查用户是否请求注册而不是重定向，更新代码如下：

session_start();

include('_includes/config.php');
include('_includes/db.php');

    if(isset($_POST['register'])){
        $_SESSION['uname'] = $_POST['uname'];
        $_SESSION['fname'] = $_POST['fname'];
        $_SESSION['lname'] = $_POST['lname'];
        $_SESSION['email'] = $_POST['email'];
        $_SESSION['address'] = $_POST['address'];
        $_SESSION['postal'] = $_POST['postal'];
        $_SESSION['pass'] = $_POST['pass'];
        $_SESSION['con-pass'] = $_POST['con-pass'];
    }

    if(strlen($_POST['uname'])<3 && isset($_POST['register'])){ // add && isset($_POST['register'])
        header("Location:register.php?err=" . urlencode("The username must be at least 3 characters long"));
        die();
    }

注意： 我建议您不要重定向用户以在某些文件中有代码时显示错误消息！您可以将错误消息存储在 vars 中并检查错误 var 是否为空 echo it！

session_start();

include('_includes/config.php');
include('_includes/db.php');
$error = ''; //add this var
    if(isset($_POST['register'])){
        $_SESSION['uname'] = $_POST['uname'];
        $_SESSION['fname'] = $_POST['fname'];
        $_SESSION['lname'] = $_POST['lname'];
        $_SESSION['email'] = $_POST['email'];
        $_SESSION['address'] = $_POST['address'];
        $_SESSION['postal'] = $_POST['postal'];
        $_SESSION['pass'] = $_POST['pass'];
        $_SESSION['con-pass'] = $_POST['con-pass'];
    }

    if(strlen($_POST['uname'])<3 && isset($_POST['register'])){ // add && isset($_POST['register'])
        /*header("Location:register.php?err=" . urlencode("The username must be at least 3 characters long"));
        die();*/
        $error = 'this is error message';
    }
//add below code anywhere you want show error
if($error){
    echo $error;
}