1.__construct()
实例化对象是被自动调用。当__construct和以类名为函数名的函数 同时存在时调用__construct,另一个不背调用。
类名为函数名的函数为老版的构造函数。
2.__destruct()
当删除一个对象或一个对象操作结束是被调用。
3.__call()
对象调用某个方法。若方法不存在,这调用__call 这个方法
4.__get()
读取一个对象属性,如果对象属性是私有的会调用它
5.__set()
给一个对象属性赋值时如果属性是私有的会调用它
6.__toString()
打印一个对象的时候会被调用。
7.__clone()
克隆对象时被调用,如:$a=new test(); $a1=clone $a;
8.__sleep()
Serialize 之前被调用,若对象比较大,想删减一点东西在序列化可以用它。
9.__wakeup()
Unserialize时被调用,做些对象的初始化工作。
10.__isset()
检测一个对象的属性是否存在如果 检测的属性是私有的时候会被调用。
11.__unset()
删除一个对象属性时如果 删除的对象属性是私有的会被调用
12.__set_state()
调用var_export时,被调用。用__set_state的返回值做为var_export的返回值。
13.__autoload()
实例化一个对象时,如果对应的类不存在,则该方法被掉用。

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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