// thinkphp framework 里面的命名空间问题
<code><?php namespace Home\Controller; use Think\Controller; use Think\Vender; class IndexController extends Controller { } </code></code>
问题来了,namespace Home\Controller; 第一行代码就声明了本文件的空间,
那么 IndexController 这个类就是在 Home\Controller这个命名空间下面的,
这个类继承了 Controller 这个类,此时 Home\Controller 下面没有Controller这个类,
虽然 use Think\Controller; 导入了另外一个空间,为什么
class IndexController extends Controller 不报错?因为此时 Home\Controller 下面没有Controller这个类
为什么不写成 class IndexController extends Think\Controller\Controller ?
回复内容:
// thinkphp framework 里面的命名空间问题
<code><?php namespace Home\Controller; use Think\Controller; use Think\Vender; class IndexController extends Controller { } </code></code>
问题来了,namespace Home\Controller; 第一行代码就声明了本文件的空间,
那么 IndexController 这个类就是在 Home\Controller这个命名空间下面的,
这个类继承了 Controller 这个类,此时 Home\Controller 下面没有Controller这个类,
虽然 use Think\Controller; 导入了另外一个空间,为什么
class IndexController extends Controller 不报错?因为此时 Home\Controller 下面没有Controller这个类
为什么不写成 class IndexController extends Think\Controller\Controller ?
<code>php</code><code>use Think\Controller; </code>
这行代码就已经导入了命名空间Think\Controller,不就有了Controller类么
如果你不使用:
<code>php</code><code>use Think\Controller; </code>
则需要写成
<code>php</code><code>class IndexController extends \Think\Controller\Controller {} </code>
试试下面两句:
<code>$controller = new Controller(); //$controller = new IndexController(); var_dump($controller); </code>
controller这个类已经自动加载到框架中来了
http://www.php-internals.com/book/ 建议看下内核源码是怎么实现的

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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