登陆问题-PHP 튜토리얼-php.cn

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PHP 튜토리얼

登陆问题

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Jun 23, 2016 pm 02:12 PM

로그인 문제

登录的时候报错
Warning: Cannot modify header information - headers already sent by (output started at D:\wamp\www\bbb\login.php:2) in D:\wamp\www\bbb\includes\login.func.php on line 36

Warning: Cannot modify header information - headers already sent by (output started at D:\wamp\www\bbb\login.php:2) in D:\wamp\www\bbb\includes\login.func.php on line 37

Warning: Cannot modify header information - headers already sent by (output started at D:\wamp\www\bbb\login.php:2) in D:\wamp\www\bbb\includes\global.func.php on line 40
?

global.func.php代码如下：
/**
* TestGuest Version1.0
* ================================================
* Copy 2010-2012 yc60
* Web: http://www.yc60.com
* ================================================
* Author: Lee
* Date: 2010-8-11
*/

/**
*_runtime()是用来获取执行耗时
* @access public 表示函数对外公开
* @return float 表示返回出来的是一个浮点型数字
*/
function _runtime() {
$_mtime = explode(' ',microtime());
return $_mtime[1] + $_mtime[0];
}

/**
* _alert_back()表是JS弹窗
* @access public
* @param $_info
* @return void 弹窗
*/
function _alert_back($_info) {
echo "<script>alert('$_info');history.back();</script>";
exit();
}

function _location($_info,$_url) {
if (!empty($_info)) {
echo "<script>alert('$_info');location.href='$_url';</script>";
exit();
} else {
header('Location:'.$_url);
}
}

/**
* _login_state登录状态的判断
*/

function _login_state() {
if (isset($_COOKIE['username'])) {
_alert_back('登录状态无法进行本操作！');
}
}

/**
* _session_destroy删除session
*/

function _session_destroy() {
session_destroy();
}

/**
* 删除cookies _unsetcookies()
*/

function _unsetcookies() {
setcookie('username','',time()-1);
setcookie('uniqid','',time()-1);
_session_destroy();
_location(null,'index.php');
}

/**
*
*/

function _sha1_uniqid() {
return _mysql_string(sha1(uniqid(rand(),true)));
}

/**
* _mysql_string
* @param string $_string
* @return string $_string
*/

function _mysql_string($_string) {
//get_magic_quotes_gpc()如果开启状态，那么就不需要转义
if (!GPC) {
return mysql_real_escape_string($_string);
}
return $_string;
}

/**
* _check_code
* @param string $_first_code
* @param string $_end_code
* @return void 验证码比对
*/

function _check_code($_first_code,$_end_code) {
if ($_first_code != $_end_code) {
_alert_back('验证码不正确!');
}
}

/**
* _code()是验证码函数
* @access public
* @param int $_width 表示验证码的长度
* @param int $_height 表示验证码的高度
* @param int $_rnd_code 表示验证码的位数
* @param bool $_flag 表示验证码是否需要边框
* @return void 这个函数执行后产生一个验证码
*/
function _code($_width = 75,$_height = 25,$_rnd_code = 4,$_flag = false) {

//创建随机码
for ($i=0;$i $_nmsg .= dechex(mt_rand(0,15));
}

//保存在session
$_SESSION['code'] = $_nmsg;

//创建一张图像
$_img = imagecreatetruecolor($_width,$_height);

//白色
$_white = imagecolorallocate($_img,255,255,255);

//填充
imagefill($_img,0,0,$_white);

if ($_flag) {
//黑色,边框
$_black = imagecolorallocate($_img,0,0,0);
imagerectangle($_img,0,0,$_width-1,$_height-1,$_black);
}

//随即画出6个线条
for ($i=0;$i $_rnd_color = imagecolorallocate($_img,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255));
imageline($_img,mt_rand(0,$_width),mt_rand(0,$_height),mt_rand(0,$_width),mt_rand(0,$_height),$_rnd_color);
}

//随即雪花
for ($i=0;$i $_rnd_color = imagecolorallocate($_img,mt_rand(200,255),mt_rand(200,255),mt_rand(200,255));
imagestring($_img,1,mt_rand(1,$_width),mt_rand(1,$_height),'*',$_rnd_color);
}

//输出验证码
for ($i=0;$i $_rnd_color = imagecolorallocate($_img,mt_rand(0,100),mt_rand(0,150),mt_rand(0,200));
imagestring($_img,5,$i*$_width/$_rnd_code+mt_rand(1,10),mt_rand(1,$_height/2),$_SESSION['code'][$i],$_rnd_color);
}

//输出图像
header('Content-Type: image/png');
imagepng($_img);

//销毁
imagedestroy($_img);
}

?>

回复讨论(解决方案)

output started at D:\wamp\www\bbb\login.php:2
是说在 D:\wamp\www\bbb\login.php 第2行发现有输出

output started at D:\wamp\www\bbb\login.php:2
是说在 D:\wamp\www\bbb\login.php 第2行发现有输出

这是login.php的代码：

/**
* TestGuest Version1.0
* ================================================
* Copy 2010-2012 yc60
* Web: http://www.yc60.com
* ================================================
* Author: Lee
* Date: 2010-8-21
*/
session_start();
//定义个常量，用来授权调用includes里面的文件
define('IN_TG',true);
//定义个常量，用来指定本页的内容
define('SCRIPT','login');
//引入公共文件
require dirname(__FILE__).'/includes/common.inc.php';
//登录状态
_login_state();
//开始处理登录状态
if ($_GET['action'] == 'login') {
//为了防止恶意注册，跨站攻击
_check_code($_POST['code'],$_SESSION['code']);
//引入验证文件
include ROOT_PATH.'includes/login.func.php';
//接受数据
$_clean = array();
$_clean['username'] = _check_username($_POST['username'],2,20);
$_clean['password'] = _check_password($_POST['password'],6);
$_clean['time'] = _check_time($_POST['time']);
//到数据库去验证
if (!!$_rows = _fetch_array("SELECT tg_username,tg_uniqid FROM tg_user WHERE tg_username='{$_clean['username']}' AND tg_password='{$_clean['password']}' AND tg_active='' LIMIT 1")) {
_close();
_session_destroy();
_setcookies($_rows['tg_username'],$_rows['tg_uniqid'],$_clean['time']);
_location(null,'index.php');
} else {
_close();
_session_destroy();
_location('用户名密码不正确或者该账户未被激活！','login.php');
}
}
?>
nbsp;html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">