错误：本地主机重定向你太多次

Question

嗨，我是一名新学生，开始专门在 PHP 上学习编码/编程。我尝试学习了一些代码，但遇到了这个问题。

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localhost 将您重定向了太多次。 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，请帮助并请让我了解我做错了什么。

Answer 1

检查用户是否请求注册而不是重定向，更新如下代码：

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

注意：如果某些文件中有代码，我建议您不要重定向用户以显示错误消息！您可以将错误消息存储在 vars 中并检查错误 var 是否不为空回显它！

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;
}