php框架不用写sql语句就能调用数据库里表的字段是怎么实现的
据说很多框架不用写sql语句,仅凭封装就能调用数据表的字段,这个是怎么实现的,不可思议啊,因为传统的教程都说,不通过sql语句无法操作数据库啊,这到底是怎么 回事
拒绝那种发百度里的文章的帖子。要有自己的看法
回复讨论(解决方案)
这个很好实现
写个php类 把数据库操作语句写到这个类里
然后传参调用,不知我说明白没有
类里面的各个函数代表不同的操作。
把最基础的操作拆开封装成类后直接OOP调用即可。
把最基础的操作拆开封装成类后直接OOP调用即可。
能举一个例子吗,比如select 这一数据库查询语句的功能,如何封装呢,简单写写意思就行,我不想了解细节,只想了解大概!
大多 php 框架都在一定程度上模拟了 ORM (对象关系映射,一种概念性的、易于理解的模型化数据的方法)的实现,但最终是翻译成 sql 指令执行的
大多 php 框架都在一定程度上模拟了 ORM (对象关系映射,一种概念性的、易于理解的模型化数据的方法)的实现,但最终是翻译成 sql 指令执行的
这么 说最终还是要靠sql语句执行命令吗?能写一个翻译的句子看一下吗,简单点,只是稍微了解一下。
当然了,框架中的方法也是封装好的。归根结底,也是要执行SQL的。
function select($table,$field_array){ $field = implode(',', $field_array); $r = mysql_query("select $field from $table"); return $r;}
上面是一个简单的例子,完美的写法应该写成类,具体可以网上找下例子。
楼上取的例子好漂亮啊

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



Alipay PHP...

Article discusses late static binding (LSB) in PHP, introduced in PHP 5.3, allowing runtime resolution of static method calls for more flexible inheritance.Main issue: LSB vs. traditional polymorphism; LSB's practical applications and potential perfo

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,

Session hijacking can be achieved through the following steps: 1. Obtain the session ID, 2. Use the session ID, 3. Keep the session active. The methods to prevent session hijacking in PHP include: 1. Use the session_regenerate_id() function to regenerate the session ID, 2. Store session data through the database, 3. Ensure that all session data is transmitted through HTTPS.

The application of SOLID principle in PHP development includes: 1. Single responsibility principle (SRP): Each class is responsible for only one function. 2. Open and close principle (OCP): Changes are achieved through extension rather than modification. 3. Lisch's Substitution Principle (LSP): Subclasses can replace base classes without affecting program accuracy. 4. Interface isolation principle (ISP): Use fine-grained interfaces to avoid dependencies and unused methods. 5. Dependency inversion principle (DIP): High and low-level modules rely on abstraction and are implemented through dependency injection.

How to automatically set the permissions of unixsocket after the system restarts. Every time the system restarts, we need to execute the following command to modify the permissions of unixsocket: sudo...

How to debug CLI mode in PHPStorm? When developing with PHPStorm, sometimes we need to debug PHP in command line interface (CLI) mode...

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.
