404页面ThinkPHP
首先在ACTION中新建一个文件EmptyAction.class.php,其代码如下:
<?php class EmptyAction extends Action{ function _empty(){ header("HTTP/1.0 404 Not Found");//使HTTP返回404状态码 $this->display("Public:404"); } } ?>
使用apache服务器的情况下需在apache中的网站配置中加入 ErrorDocument 404 /404.html 即可。
使用iis服务器的情况下需在iis中的IIS/ASP.net下设置404错误页面。
打开apache httpd.conf配置文件或者新建.htaccess配置文件
首先,修改应用程序根目录的设置,打开 “web.config” 文件编辑,在其中加入如下内容:
<configuration> <system.web> <customErrors mode=”On” defaultRedirect=”error.asp”> <error statusCode=”404″ redirect=”notfound.asp” /> </customErrors> </system.web> </configuration>
注:上文例中“error.asp”为系统默认的404页面,“notfound.asp”为自定义的404页面,使用时请修改相应文件名。
然后,在自定义的404页面“notfound.asp”中加入:
<% Response.Status = “404 Not Found” %>
php的404页面:
if(//如果没有任何结果) { //以前是仅仅显示“该帖子已经不存在”的提示,现在是: require('/404.php'); @header('HTTP/1.1 404 Not Found''); @header('Status: 404 Not Found'); exit; }

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

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.


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