search

标头 缓存

Warning: Cannot modify header information - headers already sent by (output started at E:\AppServ\www\php_cs_wenjian\yingp\qbzy.php:23) in E:\AppServ\www\php_cs_wenjian\yingp\includes\hanshu.php on line 333

这个问题以前遇过解决了用的是排除一点点的搞!这次代码很好找不出问题而且关系到很多函数所以想请教大手们给个方法!听说缓存技术可以解决!谁知道吗?我没用过缓存、

回复讨论(解决方案)

代码中两次调用了 设置header的 函数,两次调用很可能都是header()

代码中两次调用了 设置header的 函数,两次调用很可能都是header()
我只是写一个简单的判断类然后生成cookie!

是否之前有输出,比如空行。文件编码是否一致。

文件前有没有输出?
还有一个可能。BOM头

是否之前有输出,比如空行。文件编码是否一致。
是输出到浏览器还是怎么输出、我把判断放在函数集里面的、然后调用函数集到用的页面上、还用那个空行是什么意思?

具体还是要你贴出代码。

具体还是要你贴出代码。
这个又两个函数页面一个数据库页面一个出问题的页面!四个页面的代码有七八百行怎么贴啊

具体还是要你贴出代码。
class goow{
public $han = "<script>window.onload = function(){boxs(1);}</script>";
function cshu($czhi){
echo $this->han;
$this->scuo = "

$czhi
";
}
}
class goow_cd extends goow{
private $_char_pattern = '/[\|\'\$\"\ ]/';
function d($user,$pass){
if ($user == ''){
$this->cshu('用户名不得为空');
return false;
}
$this->user = $user;
if ($pass == ''){
$this->cshu('密码不得为空');
return false;
}
if (10  $this->cshu('用户名不得少于2位或大于10位');
return false;
}
if (preg_match($this->_char_pattern,$user)) {
$this->cshu('用户名不得包含敏感字符');
return false;
}
if (16  $this->cshu('密码不得少于6位或大于10位');
return false;
}
$pass = sha1(md5($pass));
$this->pass = $pass;
if (!my_shuz("select user from user where user = '$user' LIMIT 1")){
$this->cshu('没有此用户');
return false;
}
if (!my_shuz("select pass from user where pass = '$pass' LIMIT 1")){
$this->cshu('用户或密码错误');
return false;
}
if (!my_shuz("select zyuip from user where zyuip = '' and user = '$user' LIMIT 1")){
$this->cshu('该帐号还未激活');
return false;
}
setcookie("UserName",$user);
}
}


这是类





session_start();
define('IN_TG',true);
require substr(dirname(__FILE__),0,-6).'/yingp/includes/hanshu.php';
if ($_GET['shouid'] != ''){
q_mysql();
$p_xiangx = pduan_f("select * from product where p_id = '{$_GET['shouid']}'",'没有此商品');
}else{
tangc('没有此类商品');
}
$p_zp = array_filter(split(',',$p_xiangx['p_zp']));
$p_dx = array_filter(split(',',$p_xiangx['p_dx']));
$p_zps = count($p_zp);
echo "<script></script>";
if ($_GET['shul'] != '' && $_GET['hm'] != ''){
if($_POST['d_tj'] != ''){
$user = trim($_POST['user']);
$pass = trim($_POST['pass']);
$czhi = new goow_cd();
$czhi->d($user,$pass);
 }else{
 tangc('非法提交!');
 }
}
?>


这个是我调用页面的头部php

具体还是要你贴出代码。
以前输出cookie的时候就没问题!应该就是这两句代码的问题!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
PHP: An Introduction to the Server-Side Scripting LanguagePHP: An Introduction to the Server-Side Scripting LanguageApr 16, 2025 am 12:18 AM

PHP is a server-side scripting language used for dynamic web development and server-side applications. 1.PHP is an interpreted language that does not require compilation and is suitable for rapid development. 2. PHP code is embedded in HTML, making it easy to develop web pages. 3. PHP processes server-side logic, generates HTML output, and supports user interaction and data processing. 4. PHP can interact with the database, process form submission, and execute server-side tasks.

PHP and the Web: Exploring its Long-Term ImpactPHP and the Web: Exploring its Long-Term ImpactApr 16, 2025 am 12:17 AM

PHP has shaped the network over the past few decades and will continue to play an important role in web development. 1) PHP originated in 1994 and has become the first choice for developers due to its ease of use and seamless integration with MySQL. 2) Its core functions include generating dynamic content and integrating with the database, allowing the website to be updated in real time and displayed in personalized manner. 3) The wide application and ecosystem of PHP have driven its long-term impact, but it also faces version updates and security challenges. 4) Performance improvements in recent years, such as the release of PHP7, enable it to compete with modern languages. 5) In the future, PHP needs to deal with new challenges such as containerization and microservices, but its flexibility and active community make it adaptable.

Why Use PHP? Advantages and Benefits ExplainedWhy Use PHP? Advantages and Benefits ExplainedApr 16, 2025 am 12:16 AM

The core benefits of PHP include ease of learning, strong web development support, rich libraries and frameworks, high performance and scalability, cross-platform compatibility, and cost-effectiveness. 1) Easy to learn and use, suitable for beginners; 2) Good integration with web servers and supports multiple databases; 3) Have powerful frameworks such as Laravel; 4) High performance can be achieved through optimization; 5) Support multiple operating systems; 6) Open source to reduce development costs.

Debunking the Myths: Is PHP Really a Dead Language?Debunking the Myths: Is PHP Really a Dead Language?Apr 16, 2025 am 12:15 AM

PHP is not dead. 1) The PHP community actively solves performance and security issues, and PHP7.x improves performance. 2) PHP is suitable for modern web development and is widely used in large websites. 3) PHP is easy to learn and the server performs well, but the type system is not as strict as static languages. 4) PHP is still important in the fields of content management and e-commerce, and the ecosystem continues to evolve. 5) Optimize performance through OPcache and APC, and use OOP and design patterns to improve code quality.

The PHP vs. Python Debate: Which is Better?The PHP vs. Python Debate: Which is Better?Apr 16, 2025 am 12:03 AM

PHP and Python have their own advantages and disadvantages, and the choice depends on the project requirements. 1) PHP is suitable for web development, easy to learn, rich community resources, but the syntax is not modern enough, and performance and security need to be paid attention to. 2) Python is suitable for data science and machine learning, with concise syntax and easy to learn, but there are bottlenecks in execution speed and memory management.

PHP's Purpose: Building Dynamic WebsitesPHP's Purpose: Building Dynamic WebsitesApr 15, 2025 am 12:18 AM

PHP is used to build dynamic websites, and its core functions include: 1. Generate dynamic content and generate web pages in real time by connecting with the database; 2. Process user interaction and form submissions, verify inputs and respond to operations; 3. Manage sessions and user authentication to provide a personalized experience; 4. Optimize performance and follow best practices to improve website efficiency and security.

PHP: Handling Databases and Server-Side LogicPHP: Handling Databases and Server-Side LogicApr 15, 2025 am 12:15 AM

PHP uses MySQLi and PDO extensions to interact in database operations and server-side logic processing, and processes server-side logic through functions such as session management. 1) Use MySQLi or PDO to connect to the database and execute SQL queries. 2) Handle HTTP requests and user status through session management and other functions. 3) Use transactions to ensure the atomicity of database operations. 4) Prevent SQL injection, use exception handling and closing connections for debugging. 5) Optimize performance through indexing and cache, write highly readable code and perform error handling.

How do you prevent SQL Injection in PHP? (Prepared statements, PDO)How do you prevent SQL Injection in PHP? (Prepared statements, PDO)Apr 15, 2025 am 12:15 AM

Using preprocessing statements and PDO in PHP can effectively prevent SQL injection attacks. 1) Use PDO to connect to the database and set the error mode. 2) Create preprocessing statements through the prepare method and pass data using placeholders and execute methods. 3) Process query results and ensure the security and performance of the code.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Chat Commands and How to Use Them
1 months agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Atom editor mac version download

Atom editor mac version download

The most popular open source editor

MinGW - Minimalist GNU for Windows

MinGW - Minimalist GNU for Windows

This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

EditPlus Chinese cracked version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor