在最近几年,万维网(也称环球信息网,即WWW)不断改变信息处理技术的面貌。WEB已经快速地成为一种有效的媒介,并适合人们和商业沟通和协作。几乎所有的信息技术领域都普遍受到WEB的影响。Web访问带来更多用户和更多数据,这意味着给服务器和数据库更多压力和最终用户得到越来越慢的响应速度。与不断靠增加CPU,磁盘驱动器及内存来跟上这种增长的需求相比, WEB动态网页面静态化应该是一个更实用,更经济的选择。
用PHP实现WEB动态网页静态化的具体实现函数如function gen_static_file()所示
function gen_static_file($program, $filename) { $program 1= "/usr/local/apache/htdocs/php/" . $program; $filename1 = "/usr/local/apache/htdocs/ static_html/" . $filename; $cmd_str = "/usr/local/php4/bin/php " . $program1 . " } " . $filename1 . " "; system($cmd_str); echo $filename . " generated.〈br〉"; } |
这个函数是实现静态化的关键,即PHP动态页面程序不是被送到浏览器中,而是输入到名为$filename的文件中去(如图2)。两个参数中$program是PHP动态页面程序,$filename是生成的静态页面的名字(可根据需要自己制定命名规则,这一点很重要,见下文),/usr/local/php4/bin/php是PHP中具有把程序输入文件功能的部分,System是PHP中执行外部命令的函数。我们还可以看出所有生成动态页面的php程序需放在/php/目录下,所有新产生的静态页面则会出现在/static_html/目录下(这些路径可以根据具体需要设置)。
下面让我们举个具体例子,看一下college_static.php的静态页面是怎样生成的。
function gen_college_static () { for ($i = 0; $i 〈= 32; $i 〉 { putenv("province_id=" . $i); //*.php文件从数据库取数据时要用到。 $filename = " college_static". $i . ".html"; gen_static_file("college_static.php", $filename); } |
从这个函数我们可以看到通过调用函数gen_static_file(), college_static.php经过静态化,变成了33个静态页面college.static0.html~college.static33.html,其中$filename会随着$I的变化而变化。当然也可以从数据库中直接取值,来控制生成的静态页面的个数和名字,其他程序对生成的静态页面的调用应和静态页面的命名规则一致。

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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