1

可能重复：
PHP 已发送的标头

昨天我终于拿到了我的第一本 Mac Book。我喜欢它，但有一个问题真的困扰着我。出于某种原因，我从 Windows 笔记本电脑转移的项目无法正常工作。XAMPP 启动，我转到 localhost/CI_BUHZ 并且登录页面按预期工作，我输入我的凭据并按 Enter，但由于某种原因，整个事情都卡在了我的登录控制器中的 validate_credentials 函数上。它没有给我任何错误，只有 2 个警告 - 包括在下面

我想指出：*这个项目在我转移它的旧 Windows 笔记本电脑上完美运行。*据我所知，Mod Rewrite 已开启——如果我的其他控制器方法调用（例如 CI_PROJECT/Login 和 CI_PROJECT/Feeds/Home）正常工作？*即使我删除了 validate_credentials 函数并仅使用以下内容重新创建它：

function validate_credentials()
    {  



    redirect('site/home');
    }

它仍然不会从我的 Mac 上的登录 -> 站点/主页。

这是原始的验证凭据功能：

function validate_credentials()
    {       
        $this->load->model('membership_model');
        $query = $this->membership_model->validate();
        if($query) // if the user's credentials validated...
        {
            $uid = $this->membership_model->grab_uid();
            $data = array(
                'username' => $this->input->post('username'),
                'uid' => $uid,
                'is_logged_in' => true
        );
        $this->session->set_userdata($data);
        redirect('site/home');
        }
        else // incorrect username or password
        {
            $this->index();
        }
    }

这是.htaccess：

<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /CI_BUHZ/

    #Removes access to the system folder by users.
    #Additionally this will allow you to create a System.php controller,
    #previously this would not have been possible.
    #'system' can be replaced if you have renamed your system folder.
    RewriteCond %{REQUEST_URI} ^system.*
    RewriteRule ^(.*)$ /index.php?/$1 [L]

    #When your application folder isn't in the system folder
    #This snippet prevents user access to the application folder
    #Submitted by: Fabdrol
    #Rename 'application' to your applications folder name.
    RewriteCond %{REQUEST_URI} ^application.*
    RewriteRule ^(.*)$ /index.php?/$1 [L]

    #Checks to see if the user is attempting to access a valid file,
    #such as an image or css document, if this isn't true it sends the
    #request to index.php
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^(.*)$ index.php?/$1 [L]
</IfModule>

<IfModule !mod_rewrite.c>
    # If we don't have mod_rewrite installed, all 404's
    # can be sent to index.php, and everything works as normal.
    # Submitted by: ElliotHaughin

    ErrorDocument 404 /index.php
</IfModule>

这是它抱怨的 img_model （即使被调用的函数根本不需要这个模型：

<?php

class Image_model extends CI_Model {


function get_images ($album_id, $uid){
    $album_id =(int)$album_id;
    $q = $this->db->query("SELECT image_id, album_id_fk, timestamp, ext, uid_fk FROM images WHERE album_id_fk = $album_id AND uid_fk = $uid");
        if($q->num_rows() > 0) {
            foreach($q->result() as $row) {
                $data[] = $row;
            }

            return $data;
        }
    }


function image_check($image_id , $uid_fk){
$image_id = (int)$image_id;
$query = mysql_query("SELECT COUNT(image_id) FROM images WHERE image_id = $image_id AND $uid_fk");
return (mysql_result($query, 0)==1) ? true : false;

}

function delete_image($uid_fk, $image_id){
$image_id =(int)$image_id;

$image_query = mysql_query("SELECT album_id_fk , ext , uid_fk FROM images WHERE image_id = $image_id AND uid_fk = $uid_fk");
$image_result = mysql_fetch_assoc($image_query);
$album_id = $image_result['album_id_fk'];
$ext = $image_result['ext'];
$uid = $image_result['uid_fk'];

unlink('uploads/'.$uid.'_'.$album_id.'_'.$image_id.'.'.$ext);
unlink('uploads/thumbs/'.$uid.'_'.$album_id.'_'.$image_id.'.'.$ext);

mysql_query("DELETE FROM images WHERE image_id = $image_id AND uid_fk = $uid_fk");


}
}

?>


A PHP Error was encountered
Severity: Warning
Message: Cannot modify header information - headers already sent by (output started at /Applications/XAMPP/xamppfiles/htdocs/CI_BUHZ/application/models/image_model.php:2)
Filename: libraries/Session.php
Line Number: 672
A PHP Error was encountered
Severity: Warning
Message: Cannot modify header information - headers already sent by (output started at /Applications/XAMPP/xamppfiles/htdocs/CI_BUHZ/application/models/image_model.php:2)
Filename: helpers/url_helper.php
Line Number: 546
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1 回答 1

0

确保在修改标头之前没有输出任何内容。

?>出现此错误消息的一个非常常见的原因是结束 PHP标记后有换行符或其他文本。如果文件中只有 PHP，最好不要使用?>（这不是强制性的，也不是必需的）。

于 2012-12-24T00:33:46.063 回答