提到PHP开发web,自然离不开开发框架,开发框架为我们提供了灵活的开发方式,MVC层分离,业务解耦等。。。
第一篇先来简单点的,说说MVC框架的路由功能。。。
一般的单入口框架路由都是这样的结构:
domain/index.php/classname/functionname/var1/var2
这里的index.php 就被称为入口文件。。。对于服务器而言,你这里访问的就只有index.php 后面调用的controller 和里面的方法,甚至传值都是在框架内部基于PHP层面实现的。
Talk is cheap, show you the code !!
首先,先建立好下面的文件结构
我们来动手试试,怎么才能访问到controllers里面的文件。。。
在index.php里面输入以下内容
print_r($_SERVER);
然后访问 以下地址试试。
yourdomain/index.php/class/function/var1
这里作者我是用本地环境的,我访问的地址是localhost/MVC/index.php/class/function/var1
我贴出最重要的2个变量
[REQUEST_URI] => /MVC/index.php/class/function/var1
[SCRIPT_NAME] => /MVC/index.php
其实路由最基本的原理就在这里:
通过这2个变量来提取url地址里的class 和 function,参数等,然后把class include进来,通过PHP的回调函数call_user_func_array 调用对应的function和传递相应的参数。
接下来上代码,读代码应该比我写的易懂。哈哈~~
index.php 的内容如下
<?php # 定义application路径 define(‘APPPATH', trim(__DIR__,'/')); # 获得请求地址 $root = $_SERVER['SCRIPT_NAME']; $request = $_SERVER['REQUEST_URI']; $URI = array(); # 获得index.php 后面的地址 $url = trim(str_replace($root, ”, $request), ‘/'); # 如果为空,则是访问根地址 if (empty($url)) { # 默认控制器和默认方法 $class = ‘index'; $func = ‘welcome'; } else { $URI = explode(‘/', $url); # 如果function为空 则默认访问index if (count($URI) < 2) { $class = $URI[0]; $func = ‘index'; } else { $class = $URI[0]; $func = $URI[1]; } } # 把class加载进来 include(APPPATH . ‘/' . ‘application/controllers/' . $class . ‘.php'); #实例化 $obj = new ucfirst($class); call_user_func_array( # 调用内部function array($obj,$func), # 传递参数 array_slice($URI, 2) );
在application/controllers 里面添加下面2个文件
index.php 用于作为默认控制器
<?php class Index { function welcome() { echo ‘I am default controller'; } } ?> hello.php <?php class Hello { public function index() { echo ‘hello world'; } public function name($name) { echo ‘hello ‘ . $name; } } ?>
测试一下看看,能不能访问了。根据上面的路由结构。我们来试试
这个访问正常,正确调用了hello这个class内部的name方法,然后把参数barbery传递过去了。。。
再试试不输入function name,看看能不能默认调用index。。
答案也是可以的。。。
最后一个,访问root地址看看
也正确的映射到了默认控制器上。。。
ok,一个简单的MVC路由功能就完成了。。。

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.

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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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