Home php教程 php手册 php框架练习

php框架练习

Jun 06, 2016 pm 07:50 PM
php effect Function operate database frame stencil practise

框架的作用: 功能:操作数据库 模版引擎smarty 分析,应该具备什么功能? a:具体配置文件 ,配置文件的读取功能 b:数据库处理类 c:目录结构 先建一个includes文件放入,配置文件(config.php),配置类(conf.class.php),mysql数据库处理类(mysql.class.php),

框架的作用:

功能:操作数据库 模版引擎smarty

分析,应该具备什么功能?

a:具体配置文件 ,配置文件的读取功能
b:数据库处理类
c:目录结构

先建一个includes文件放入,配置文件(config.php),配置类(conf.class.php),mysql数据库处理类(mysql.class.php),网站初始化文件(init.php)

config.php  文件:

 

//网站的配置文件

$_cfg=array();

$_cfg['host']='localhost';
$_cfg['user']='root';
$_cfg['pwd']='root';
$_cfg['db']='xxzdb';
$_cfg['char']='utf8';
//$_cfg['']='';
//$_cfg['']='';
Copy after login


conf.class.php

 

//配置文件的读取类
//作用:读取config.php 并能返回某个配置选项的值
class Conf{
	private static $ins = false;
	private $info = array();
	
	
	final protected function __construct(){
		require(ROOT .'includes/config.php');
		$this->info = $_cfg;
	} 
	
	//单例
	public static function getIns(){
		if(self::$ins === false){
			self::$ins = new self();
		
		}
		return self::$ins;
		
	}
	
	//读取配置文件的信息
	public function __get($key){
		if(array_key_exists($key,$this->info)){
		return $this->info[$key];
		} else {
		return null;
		}
	}

	public function __set($key,$value){
		$this->info[$key] = $value;
	
	}
	//测试方法
	public function printc(){
	
		print_r($this->info);
	}
}

//调用
/*
$conf = Conf::getIns();

$conf->template_dir='d:/www';
echo $conf->printc();
*/
Copy after login

 

mysql.class.php

//require('conf.class.php');
//数据库的处理类

//抽象类 没有方法体
abstract class abs_db{
	abstract protected function connect();
	abstract protected function select_db($dbname='');
	abstract protected function setChar();
	abstract protected function	query($sql);
	abstract protected function	getAll($sql);
	abstract protected function	getRow($sql);
	abstract protected function getOne($sql);
	abstract protected function error();
}	

class Mysql extends abs_db{
	private static $ins = false;
	private $conn = false;
	private $conf = false;
	
	protected function __construct(){
		
		$this->conf = Conf::getIns();
	    $this->connect();
		$this->select_db();
		$this->setChar();
	}
	
	public static function getIns(){
		if(self::$ins === false){
			self::$ins= new self();
		}
		return self::$ins;
	}
	
	//创建连接
	protected function connect(){
		$this->conn = mysql_connect($this->conf->host,$this->conf->user,$this->conf->pwd);
		if(!$this->conn){
			$err = new Exception('连接失败');
			throw $err;
		}
	}
	
	//选择数据库
	protected function select_db($dbname=''){
		if($dbname == ''){
			$sql='use '.$this->conf->db;
			$this->query($sql);
		}
	}
	
	//设置字符集
	protected function setChar(){
		$sql='set names '.$this->conf->char;
		$this->query($sql);
	}
	
	//执行sql语句
	public function query($sql){
		return mysql_query($sql,$this->conn);
	}
	
	//取回所有行
	public function getAll($sql){
		$rs = $this->query($sql);
		
		$list=array();
		while($row = mysql_fetch_assoc($rs)){
			$list[] = $row;
		}
		return $list;
	}
	
	//取回一行
	public function getRow($sql){
		$rs = $this->query($sql);
		return mysql_fetch_assoc($rs);
	}
	
	public function getOne($sql){
	
	}
	
	public function error(){
		print_r(mysql_error($this->conn));
	}
	
	//关闭资源
	public function __destruct(){
	}
}
/*
$db = Mysql::getIns();

print_r($db);
$sql="select * from art limit 5";
print_r($db->getAll($sql));
*/
Copy after login


init.php

//网站的初始化文件
/**

魔术方法
__FILE__ 当前绝对路径


文件作用:
负责当前网站的根目录
引入所以页面都需要的文件

*/

//ROOT 代表网站的跟路径
define('ROOT',str_replace('\\','/',str_replace('includes\init.php','',__FILE__)));

require(ROOT .'includes/conf.class.php');
require(ROOT .'includes/mysql.class.php');
//echo ROOT;
Copy after login



 

 

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian Dec 24, 2024 pm 04:42 PM

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

How To Set Up Visual Studio Code (VS Code) for PHP Development How To Set Up Visual Studio Code (VS Code) for PHP Development Dec 20, 2024 am 11:31 AM

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

Explain JSON Web Tokens (JWT) and their use case in PHP APIs. 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,

How do you parse and process HTML/XML in PHP? How do you parse and process HTML/XML in PHP? Feb 07, 2025 am 11:57 AM

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

PHP Program to Count Vowels in a String PHP Program to Count Vowels in a String Feb 07, 2025 pm 12:12 PM

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

Explain late static binding in PHP (static::). 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? 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.

Explain the match expression (PHP 8 ) and how it differs from switch. 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.

See all articles