一般而言,页面文件开启gzip压缩以后,其体积可以减小60%~90%,对于文字类站点,可以节省下大量的带宽与用户等待时间。但是不论是iis还是apache默认都只压缩html类静态文件,对于php文件需要模块配置才可支持(iis7.5中开启动态+静态压缩也可以),于是利用php自身功能到达gzip的效果也成为一项合理的诉求。
网上的教程基本是你抄我来我抄他,不外乎加头加尾或者自构函数两种写法。实际上每个php页面都要去加代码——当然也可以include引用,不过总显得略微麻烦。
实际上最简单的办法,打开php目录下的php.ini文件,找到zlib.output_compression = Off,改成zlib.output_compression = On,
再把;zlib.output_compression_level前面的;去掉,后面的-1改成1~5的数值。这样便可以实现所有php页面的gzip效果,不再需要单独修改网站的php文件——如果站点很多的话,会节省很多时间。
需要说明的是以下几点
一、;zlib.output_handler必须保持注释掉,因为此参数和前面的设置冲突——官方的说法。
二、一般情况下缓存是4k(output_buffering = 4096)。
三、zlib.output_compression_level 建议参数值是1~5,6以实际压缩效果提升不大,cpu占用却是几何增长。

图1.通过firebug查看请求头和回应头,实际上gzip效果已经显示

图2.站长站gzip检测工具也显示gzip有效。

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.

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.


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