php框架开发4(DAO层)
php框架开发四(DAO层)
网站开发不可避免地要对一些数据进行储存,但是存储这些数据各种语言的方式基本上都是:先打开连接,然后执行SQL语句,获取结结果,关闭连接。
那么PHP在操作数据库的时候有哪些方法呢?
<?php $connect = mysql_connect($host,$user,$pass); mysql_select_db($dbname); $result = mysql_query($query); while($row = (mysql_fetch_array($result))){ print_r($row); }
用以上操作可以来操作数据库。对于在HTML嵌入PHP脚本的行业,这已经足够了,但是当我们要进行大量的增删改查时,必须要把多次的上面的脚本进行复用。那么就会出现这样的模式
DAO层http://blog.csdn.net/tomyjohn/article/details/7675770
我们暂且把上面的模式就做DAO层,但是真正的意义在于我们这个MVC框架,恰好可以用这个方式来操作。下面我们新建一个controller
<?php class index{ public function demo(){ $art = new article(); $art->title = '标题'; $art->content = '内容'; $art->save(); echo $art->id; view::show('index.htm'); } }
在数据库里新建一张表,表名为“si_article”,
DROP TABLE IF EXISTS `si_article`; CREATE TABLE `si_article` ( `id` int(8) NOT NULL AUTO_INCREMENT, `title` varchar(255) DEFAULT NULL, `content` text, PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=gbk;
在“modules”文件夹内新建一个“article.php”
<?php class article extends dao{ protected $table = __CLASS__; }
当我们执行上面的controller时,便可以看到刚插入的数据的ID。
这样我们可以很简单地实现一个在线留言的功能。
这个框架讲到现在,差不多所有的MVC都已经描述了一遍,你可以用它来开发,当然它是一个完整的但并不丰富的MVC。我们要考虑的事情还有很多。譬如分页,缓存,安全等等。但这并不影响我对这个轮子的热爱。

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

AI Hentai Generator
Generate AI Hentai for free.

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

PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

One of the major changes introduced in MySQL 8.4 (the latest LTS release as of 2024) is that the "MySQL Native Password" plugin is no longer enabled by default. Further, MySQL 9.0 removes this plugin completely. This change affects PHP and other app

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op

CMS stands for Content Management System. It is a software application or platform that enables users to create, manage, and modify digital content without requiring advanced technical knowledge. CMS allows users to easily create and organize content

The page is blank after PHP connects to MySQL, and the reason why die() function fails. When learning the connection between PHP and MySQL database, you often encounter some confusing things...
