PHP所谓的免费是指什么?
是指我学习它是免费,不用付钱,但用于商业要钱吗?
MYSQL用于商业要钱的吗?
还有相关的软件用于商业要钱的吗?
求扫盲!!
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asp.net也可以不要钱(买服务器的系统除外)。装个iis,用记事本写asp.net
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没有谁说过 php 是免费的吧?
你说的“PHP所谓的免费”应该是一种误解
php 系统是开源的,任何人都可以无偿使用。但你需要将你对他的任何修改都向其作者通报并提交副本。(脑力也是钱)
但是php程序可以开源,也可以不开源,也不一定都是无偿使用的
php的开发工具基本上都是有偿的(虽然你可能使用的是破解版)
mysql 系统也是这样的
开源系统经济来源可以是:政府拨款、社会捐赠、技术服务以及广告等等
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php应该说是免费的,有谁用php付过费。
php的license在这里http://www.php.net/license/
“The PHP license is a BSD-style license which does not have the "copyleft" restrictions associated with GPL.”
php的许可协议是BSD风格的,这个开源协议基本没有限制,包括商业和私用。无非就是要保留个版权声明而已。
php有个网站叫zend.com,这里提供的开发软件和服务就是要收费的。这应该只是一个盈利项目,具体还有什么就不清楚了。
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这个“保留个版权声明而已”也只是指再分发php系统的源代码(需要用C++编译器编译的),而不是用php语言写的程序。
绝大多数的开源协议对产品(利用开源项目生成的产品,比如blender生成的3d模型)都是没有任何限制的。

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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