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











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 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

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 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 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.

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.

PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.

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.
