PHP登录头位置

我有以下代码，但我在这里被阻止

<?php
require 'members/core/init.php';
$general->logged_in_protect();

if (empty($_POST) === false) {

$username = trim($_POST['username']);
$password = trim($_POST['password']);

if (empty($username) === true || empty($password) === true) {
    $errors[] = 'Sorry, but we need your username and password.';
} else if ($users->user_exists($username) === false) {
    $errors[] = 'Sorry that username doesn\'t exists.';
} else if ($users->email_confirmed($username) === false) {
    $errors[] = 'Sorry, but you need to activate your account. 
                 Please check your email.';
} else {
    if (strlen($password) > 18) {
        $errors[] = 'The password should be less than 18 characters, without spacing.';
    }
    $login = $users->login($username, $password);
    if ($login === false) {
        $errors[] = 'Sorry, that username/password is invalid';
    }else {
        session_regenerate_id(true);// destroying the old session id and creating a new one
        $_SESSION['id'] =  $login;
        header('Location: http://www.site.ro/1/index.html');
        exit();
    }
}
} 
?>

以及以下各项：

<?php if ($page == 'login'): ?>
<?php endif; ?>

有人能帮我组合这部分代码吗

我试过了，但告诉我已经发送了

<?php if ($page == 'login'): ?>
<?php
require 'members/core/init.php';
$general->logged_in_protect();

if (empty($_POST) === false) {

$username = trim($_POST['username']);
$password = trim($_POST['password']);

if (empty($username) === true || empty($password) === true) {
    $errors[] = 'Sorry, but we need your username and password.';
} else if ($users->user_exists($username) === false) {
    $errors[] = 'Sorry that username doesn\'t exists.';
} else if ($users->email_confirmed($username) === false) {
    $errors[] = 'Sorry, but you need to activate your account. 
                 Please check your email.';
} else {
    if (strlen($password) > 18) {
        $errors[] = 'The password should be less than 18 characters, without spacing.';
    }
    $login = $users->login($username, $password);
    if ($login === false) {
        $errors[] = 'Sorry, that username/password is invalid';
    }else {
        session_regenerate_id(true);// destroying the old session id and creating a new one
        $_SESSION['id'] =  $login;
        header('Location: http://www.site.ro/1/index.html');
        exit();
    }
}
} 
?>
<?php endif; ?>

我是php初学者，所以请理解我。 先谢谢你

决心

这是最终代码：

<?php if ($page == 'login'):
require 'members/core/init.php';
$general->logged_in_protect();

if (empty($_POST) === false) {

$username = trim($_POST['username']);
$password = trim($_POST['password']);

if (empty($username) === true || empty($password) === true) {
    $errors[] = 'Sorry, but we need your username and password.';
} else if ($users->user_exists($username) === false) {
    $errors[] = 'Sorry that username doesn\'t exists.';
} else if ($users->email_confirmed($username) === false) {
    $errors[] = 'Sorry, but you need to activate your account. 
                 Please check your email.';
} else {
    if (strlen($password) > 18) {
        $errors[] = 'The password should be less than 18 characters, without spacing.';
    }
    $login = $users->login($username, $password);
    if ($login === false) {
        $errors[] = 'Sorry, that username/password is invalid';
    }else {
        session_regenerate_id(true);// destroying the old session id and creating a new one
        $_SESSION['id'] =  $login;
        header('Location: http://www.site.ro/1/index.html');
        exit();
    }
}
} 
endif; ?>

---

一旦将任何内容发送给用户，您就不能修改标题。这包括任何错误的空格或换行符

<?php if ($page == 'login'): ?>
<?php
require 'members/core/init.php';
$general->logged_in_protect();

您的代码中可能有一些空白

你可以找到它

或者最简单的解决方法是打开

输出缓冲允许您做的是回显/打印您想要的任何内容，并且仍然能够将页眉信息发送到页面中的任何位置。
如果您写出任何内容（即使是第一个空格和两个
块之前的空格都被发送的新行隔开。我知道兄弟。这就是我请求你帮助的原因！所以你确定在这个登录脚本之前没有内容？没有php警告或通知？这是正确的答案。我尊敬你。干杯，兄弟！事实上，最好是关闭该脚本正确输入并单击Castis答案旁边的白色复选标记，直到它变为绿色，因为它确实是正确的答案。@AvadanicLaudiu
<?php if ($page == 'login'):

require 'members/core/init.php';
$general->logged_in_protect();