PHP标头不起作用(GoDaddy) | PHP标头不起作用

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问题描述

我正在尝试创建登录页面，但似乎无法显示标题.

I am trying to make a login page but I can't seem to get the header to show up.

session_start();

$_SESSION['prevURL'] = $_SERVER['REQUEST_URI'];

if(!$_SESSION['set'])
{
header("location: main_login.php");
}

推荐答案

根据您的评论.您不能在Session_start()之前显示(打印，回显)HTML.

Based on your comment. You cannot show (print, echo) HTML before the Session_start();

<!DOCTYPE html>
<html>
<?php

session_start();

$_SESSION['prevURL']=$_SERVER['REQUEST_URI'];
//make this $_SESSION[ 'adminSet'] if it 's an admin-only page

if(!isset($_SESSION['set']))                {

    header("location: main_login.php");                 }
?>
<head>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"> </script>
    <script src="/bootstrap/js/bootstrap.js"> </script>
    <script src="/bootstrap/js/bootstrap.min.js"> </script>

应更改为此:

<?php
session_start();

$_SESSION['prevURL']=$_SERVER['REQUEST_URI'];
//make this $_SESSION['adminSet'] if it 's an admin-only page

if(!isset($_SESSION['set']))                {

    header("location: main_login.php");                 }
?>
<!DOCTYPE html>
<html>
<head>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"> </script>
    <script src="/bootstrap/js/bootstrap.js"> </script>
    <script src="/bootstrap/js/bootstrap.min.js"> </script>

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