Briefly describe the adapter pattern in PHP design patterns
This article mainly introduces and briefly describes the adapter pattern in PHP design patterns. Interested friends can refer to it. I hope it will be helpful to everyone.
Goal:
Can convert the interface of a class into another interface that the customer wants, so that originally incompatible interfaces can work together. The popular understanding is to adapt different interfaces into a unified API interface.
Role:
Target adaptation target, this role defines what interface other classes are converted to, which is our expected interface.
Adaptee is the interface that needs to be adapted.
Adapter adapter, the other two roles are existing roles, and the adapter role needs to be newly established. It is used to adapt the Adaptee and Target interfaces.
Application scenarios:
If data operations include mysql, mysqli, pdo, sqlite, postgresql, etc., if the generation environment needs to change the database, the adapter mode unified interface can be used . The same applies to the cache scenario. This will make it more convenient to change the cache strategy (memcache, redis, apc).
Advantages:
The adapted person completes the adaptation of the adaptation target through the adapter to achieve the purpose of being transparent to customers.
Sample code:
//适配目标，规定的接口将被适配对象实现
interface IDatabase
{
public function connect($host, $username, $password, $database);
public function query($sql);
}
//适配器
class Mysql implements IDatabase
{
protected $connect;
public function connect($host, $username, $password, $database)
{
$connect = mysql_connect($host, $username, $password);
mysql_select_db($database, $connect);
$this->connect = $connect;
//...
}
public function query($sql)
{
//...
}
}
//适配器
class Postgresql implements IDatabase
{
protected $connect;
public function connect($host, $username, $password, $database)
{
$this->connect = pg_connect("host=$host dbname=$database user=$username password=$password");
//...
}
public function query($sql)
{
//...
}
}
//客户端使用
$client = new Postgresql();
$client->query($sql);As above:
Target adaptation target: IDataBase interface
Adaptee is adapted Author: database operation function of mysql and postgresql
Adapter Adapter: mysql class and postgresql class
Summary: The above is the entire content of this article, I hope it can be useful for everyone's learning helped.
Related recommendations:
phpHow to get the file MIME type
php operates the database to determine whether the table exists Method
php method to operate MySQL database and session dialogue
The above is the detailed content of Briefly describe the adapter pattern in PHP design patterns. For more information, please follow other related articles on the PHP Chinese website!
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
1423
52
1317
25
1268
29
1246
24
Explain JSON Web Tokens (JWT) and their use case in PHP APIs.
Apr 05, 2025 am 12:04 AM
JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,
Explain late static binding in PHP (static::).
Apr 03, 2025 am 12:04 AM
Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.
What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases?
Apr 03, 2025 am 12:03 AM
What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.
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.
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
The Enduring Relevance of PHP: Is It Still Alive?
Apr 14, 2025 am 12:12 AM
PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.
Explain the match expression (PHP 8 ) and how it differs from switch.
Apr 06, 2025 am 12:03 AM
In PHP8, match expressions are a new control structure that returns different results based on the value of the expression. 1) It is similar to a switch statement, but returns a value instead of an execution statement block. 2) The match expression is strictly compared (===), which improves security. 3) It avoids possible break omissions in switch statements and enhances the simplicity and readability of the code.
