需要的工具和安装:
你必须安装下面的工具和软件:
–修改口令的Shell脚本;
– Sudo访问权;
– Apache or Lighttpd web服务器;
– PHP服务端程序。
步骤1:安装可以修改用户口令的shell脚本
该脚本可以实际用于修改Linux用户的口令(已在Linux和FreeBSD测试)。
例子: shell脚本代码
#!/bin/sh # \ exec expect -f “$0″ ${1+”$@”} set password [lindex $argv 1] spawn passwd [lindex $argv 0] sleep 1 expect “assword:” send “$password\r” expect “assword:” send “$password\r” expect eof运行shell脚本(下载链接):
$ chpasswd username password下载该脚本,然后拷贝到你的web根目录或者web服务器的其它位置(用户可读):
$ cp chpasswd /var/www/或者,如果你使用Lighttpd web服务器:
$ cp chpasswd /home/lighttpd步骤2:通过sudo以root身份执行命令
Apache或Lighttpd web服务器进入后台运行后会马上使用非root权限。这样可以很好的防止口令修改,就像passwd命令需要root权限才能修改其它用户帐号的口令。
通常, Apache 2使用www-data用户, Lighttpd使用lighttpd用户(皆为普通用户,非root用户)。使用root用户登陆,然后执行下面的命令:
# visudo现在你的web服务器允许执行口令修改脚本(chpasswd)。如果你使用Apache web服务器,执行下面的命令:
www-data ALL=NOPASSWD: /var/www/chpasswd或者,如果你使用Lighttpd web服务器,执行下面的命令:
httpd ALL=NOPASSWD: /home/lighttpd/chpasswd保存和退出文件。
步骤3.创建一个基于PHP的接口
现在你需要写一个php脚本。这里有一个php脚本实例。你可以根据你的需要来修改。至少你需要正确设置好的shell脚本位置。打开php脚本和找到shellscript一行:
$shellscript = “sudo /home/lighttpd/chpasswd”;修改shellscript指向到正确的位置。PHP的源代码从这里下载:
步骤4:运行脚本
在你的web浏览器地址栏输入网地址,你将会看到用户名和口令提示:
如果口令修改成功,你会得到的确认提示:
由于一些原因,如果口令修改失败,你可以参考下面提示获得更多详细的错误信息:
步骤5:安全
◆永远不要通过http协议直接运行上面的脚本.而是使用https协议。
◆把脚本放入到受口令保护的目录。
◆永远不要信任用户的输入。上面的php脚本只是一个例子。在现实的生产环境中,你需要考虑采用更强大的用户输入确认。讨论PHP编程的安全超出了本文的范围。你可以参考一本好的PHP书籍或者使用你喜欢的搜索引擎搜索相关的网站。

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.

In PHP, use the clone keyword to create a copy of the object and customize the cloning behavior through the \_\_clone magic method. 1. Use the clone keyword to make a shallow copy, cloning the object's properties but not the object's properties. 2. The \_\_clone method can deeply copy nested objects to avoid shallow copying problems. 3. Pay attention to avoid circular references and performance problems in cloning, and optimize cloning operations to improve efficiency.

PHP is suitable for web development and content management systems, and Python is suitable for data science, machine learning and automation scripts. 1.PHP performs well in building fast and scalable websites and applications and is commonly used in CMS such as WordPress. 2. Python has performed outstandingly in the fields of data science and machine learning, with rich libraries such as NumPy and TensorFlow.

Key players in HTTP cache headers include Cache-Control, ETag, and Last-Modified. 1.Cache-Control is used to control caching policies. Example: Cache-Control:max-age=3600,public. 2. ETag verifies resource changes through unique identifiers, example: ETag: "686897696a7c876b7e". 3.Last-Modified indicates the resource's last modification time, example: Last-Modified:Wed,21Oct201507:28:00GMT.

In PHP, password_hash and password_verify functions should be used to implement secure password hashing, and MD5 or SHA1 should not be used. 1) password_hash generates a hash containing salt values to enhance security. 2) Password_verify verify password and ensure security by comparing hash values. 3) MD5 and SHA1 are vulnerable and lack salt values, and are not suitable for modern password security.

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 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.

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.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

SublimeText3 English version
Recommended: Win version, supports code prompts!

WebStorm Mac version
Useful JavaScript development tools

SublimeText3 Linux new version
SublimeText3 Linux latest version