Laravel入门：MVC框架
本文基于Laravel 4.2编写。1. 路由Hello World在app/routes.php里面添加下面代码，然后在浏览器里访问http://<laravel host prefix>/helloworld可以见到结果。 ```Route::get('/helloworld', function() { return '<html><body>hello world</body></html>';});```2. 视图（View）理论上可以把所有代码都写在app/routes.php里面，但是这会令代码难以维护。于是，我们可以把具体的页面内容搬到视图里，让路由文件简短一些。app/routes.php ```Route::get('/helloworld', function() { return View::make('helloworld');});app/views/helloworld.php <html> <body> hello world </body></html>```3. 控制器（Controller） 我们写的是动态网页，页面里有变量，变量通过Controller传入View。app/routes.php（这次我们的路由要先指向Controller，然后再由Controller返回View内容） Route::get('/helloworld', 'HelloworldController@say');app/controllers/HelloworldController.php ```<?phpclass HelloworldController extends BaseController { public function say() { $action = 'hello'; $name = 'kitty'; return View::make('hello.world', compact('action', 'name')); // hello.world表示hello目录里的world.php文件; 我们传入两个变量$action和$name }}```app/views/hello/world.php（这次我们放在一个子目录里，避免views目录文件太多） ```<html> <body> {{$action}} {{$name}} </body></html>```页面将显示“hello kitty”4. 模型（Model）随着业务逻辑的复杂，Controller文件会变长不好维护，那么我们可以把和数据库查询相关的逻辑分到模型层里，甚至可以安排一个擅长数据库表设计和写SQL的人专门负责这一层。app/routes.php ```Route::get('/helloworld', 'HelloworldController@say');app/controllers/HelloworldController.php <?phpclass HelloworldController extends BaseController { public function say() { $name = 'kitty'; $contacts = Contact::getContacts(); return View::make('hello.world', compact('name', 'contacts')); }}```app/models/Contact.php``` <?php// 假设有个表contacts(uid, name, phone)class Contact extends Eloquent { public $timestamps = false; protected $primaryKey = 'uid'; static public function createContact($uid, $name, $phone) { // 这个方法只是演示Model可能有些什么内容，并没有实际调用。 $item = new Contact; $item->uid = $uid; $item->name = $name; $item->phone = $phone; $item->save(); return $item; } // 假设有两行内容:(1, ‘kitty’, ‘800888’), (2, 'dingdong', '900999') static public function getContacts { return DB::table('contacts')->get(); }}```app/views/hello/world.blade.php（由于需要使用循环等超越HTML语法的功能，我们需要使用blade模板语言，文件名里需要添加blade部分） ```<html> <body>@foreach ($contacts as $contact) {{ $contact->name }}’s number is {{ $contact->phone }},@endforeach </body></html>```页面将显示“kitty's number is 800888, dingdong's number is 900999,”模板语言更多语法可参考：https://laravel.com/docs/4.2/templates至此，MVC（Model-View-Controller）的框架进化完成。
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1664
14
1421
52
1315
25
1266
29
1239
24
PHP and Python: Comparing Two Popular Programming Languages
Apr 14, 2025 am 12:13 AM
PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.
PHP in Action: Real-World Examples and Applications
Apr 14, 2025 am 12:19 AM
PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.
Explain secure password hashing in PHP (e.g., password_hash, password_verify). Why not use MD5 or SHA1?
Apr 17, 2025 am 12:06 AM
In PHP, password_hash and password_verify functions should be used to implement secure password hashing, and MD5 or SHA1 should not be used. 1) password_hash generates a hash containing salt values to enhance security. 2) Password_verify verify password and ensure security by comparing hash values. 3) MD5 and SHA1 are vulnerable and lack salt values, and are not suitable for modern password security.
PHP: A Key Language for Web Development
Apr 13, 2025 am 12:08 AM
PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7
What are HTTP request methods (GET, POST, PUT, DELETE, etc.) and when should each be used?
Apr 09, 2025 am 12:09 AM
HTTP request methods include GET, POST, PUT and DELETE, which are used to obtain, submit, update and delete resources respectively. 1. The GET method is used to obtain resources and is suitable for read operations. 2. The POST method is used to submit data and is often used to create new resources. 3. The PUT method is used to update resources and is suitable for complete updates. 4. The DELETE method is used to delete resources and is suitable for deletion operations.
Explain the difference between self::, parent::, and static:: in PHP OOP.
Apr 09, 2025 am 12:04 AM
In PHPOOP, self:: refers to the current class, parent:: refers to the parent class, static:: is used for late static binding. 1.self:: is used for static method and constant calls, but does not support late static binding. 2.parent:: is used for subclasses to call parent class methods, and private methods cannot be accessed. 3.static:: supports late static binding, suitable for inheritance and polymorphism, but may affect the readability of the code.
How does PHP handle file uploads securely?
Apr 10, 2025 am 09:37 AM
PHP handles file uploads through the $\_FILES variable. The methods to ensure security include: 1. Check upload errors, 2. Verify file type and size, 3. Prevent file overwriting, 4. Move files to a permanent storage location.
How does PHP type hinting work, including scalar types, return types, union types, and nullable types?
Apr 17, 2025 am 12:25 AM
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.
