自学php快2个多月了。学着做点东西,基本函数用的还凑合,用help点开加search找。基本没问题
不过那个php主页的说明实在是很模糊,很多参数说完了还是看不懂,有实践才有真理。这点到哪里都没有错。
碰到最初的就是echo和print的区别了,自己总结了下:
同是字符串输出echo和echo、到底有啥区别尼?!!
PHP?言里说,其实哪个都不算很严密。他们都可以不用括弧()而正常工作。
目前只发现3点比较大的区别。
print " Hello " , " World " ; // syntax error。
echo " Hello " , " World " ; // syntax ok!!
※echo()用了括弧「()」以后,加逗号「,」区分?数字符串也不行!请注意。
2. print()返回?果、 echo()却不返回。 1 $output1 = print " Hello World " ; // 这个有输出结果的
2 $output2 = echo " Hello World " ; // 这个却没有哦
3.如果不需要返回结果操作的话、echo()要稍微快一些。
echo ()vs print ()
Echoing 100000 of nothing
Exe Time is 0.034925937652588 secs .
Printing 100000 of nothing
Exe Time i s 0.037981986999512 secs .
这种差距你需要么请自己判断吧

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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