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首页 > 资讯列表 > 编程/数据库 >> PHP

PHP 组件化编程技巧

PHP 2014-12-10 10:00:11 转载来源: 网络整理/侵权必删

本文为大家讲解了PHP 组件化编程技巧,感兴趣的同学参考下. PHP（外文名: Hypertext Preprocessor，中文名：“超文本预处理器”）是一种通用开源脚本语言。语法吸收了C语言、Java和Perl的特点，入门门槛较低，易于学习，使用广泛，主要适用于Web开发领域

本文为大家讲解了PHP 组件化编程技巧,感兴趣的同学参考下.

PHP（外文名: Hypertext Preprocessor，中文名：“超文本预处理器”）是一种通用开源脚本语言。语法吸收了C语言、Java和Perl的特点，入门门槛较低，易于学习，使用广泛，主要适用于Web开发领域。PHP的文件后缀名为php。

但其在UI方便却有些力不从心，不仅是PHP，任何一种Web编程语言在设计UI都有类似的问题，宿主语言与HTML混和在一个文件中，大量重复的 HTML代码，毫无任何技术含量，但又非常的费时费力。于是我就希望能够对之前做过的PHP项目UI部分进行总结和归纳，将其封装为一个个小的组件（就像 Delphi中的组件一样），在界面上呈现为统一的风格，日后可以再针对这结组件编写多个CSS文件，提供“换肤”功能。

所有的组件都继承自AbatractComponent这个类，并实现其中的toString()和render()方法。AbatractComponent又有三个主要的子类，一个是容器类Continer，其又派生出Panel、PopPanel和GroupPanel等类，第二个是控件类Control，是所有可视控件类的父类，如Button、LinkButton等类，第三个则是列表类List，实现有列表，名-值对的UI。

AbstractComponent部分代码：


<?php
/**
* Component Library
*
* @author Chris Mao
* @package Component
* @description All components must be extened from the class
* and override the both methods of toString.
* @copyright Copyright (c) 2009 JueRui Soft Studio
*
**/
class AbstractComponent {

/*
* @var _style the component style's array
*
* @access protected
*
*/
protected $_style = array();
/*
* @var _attributes the component attribute's string
*
* @access protected
*
*/
protected $_attributes = array();

/**
* constructor function
*
* @access public
*
*/
public function __construct($options = null, $style = null) {
if (!is_null($options) && (gettype($options) != "array")) {
throw new Exception("The options must be a array!!");
}
if (!empty($options) && is_array($options)) {
if (array_key_exists("style", $options)) {
if (is_array($options["style"])) {
$this->_style = array_merge($this->_style, $options["style"]);
}
unset($options["style"]);
}
$this->_attributes = array_merge($this->_attributes, $options);
}
if (!empty($style) && is_array($style)) {
$this->_style = array_merge($this->_style, $style);
}
}

/**
* set the component attributes
*
* @access protected
*
* @param $name attribute name
* @param $value attribute value, option
*
* @return AbstractComponent
*/
protected function setAttr($name, $value) {
if (array_key_exists($name, $this->_attributes)) {
unset($this->_attributes[$name]);
}
$this->_attributes[$name] = $value;
return $this;
}

/**
* get the component attributes' value
*
* @access protected
*
* @param $name attribute name
*
* @return string
*/
protected function getAttr($name) {
return array_key_exists($name, $this->_attributes) ? $this->_attributes[$name] : null;
}

/**
* set the component style
*
* @access protected
*
* @param $name style name
* @param $value style value, option
*
* @return AbstractComponent
*/
protected function setStyle($name, $value) {
if (array_key_exists($name, $this->_style)) {
unset($this->_style[$name]);
}
$this->_style[$name] = $value;
return $this;
}

/**
* get the component style's value
*
* @access protected
*
* @param $name attribute name
*
* @return string
*/
protected function getStyle($name) {
return array_key_exists($name, $this->_style) ? $this->_style[$name] : null;
}

/**
* convert the component all attributes to string like name = "value"
*
* @access protected
*
* @return string
*/
protected function attributeToString() {
//$s = array_reduce(;
$s = "";
foreach($this->_attributes as $key => $value) {
$s .= " $key="$value" ";
}
return $s;
}

/**
* convert the component style to string like style = "....."
*
* @access protected
*
* @return string
*/
protected function styleToString() {
if (empty($this->_style)) return "";
$s = "";
foreach($this->_style as $key => $value) {
$s .= " $key: $value; ";
}
$s = " style="$s" ";
return $s;
}

/**
* set or get the component attributes
*
* @access public
*
* @param $name attribute name
* @param $value attribute value, option
*
* @return string || AbstractComponent
*/
public function attr() {
$name = func_get_arg(0);
if (func_num_args() == 1) {
return $this->getAttr($name);
}
else if (func_num_args() == 2) {
$value = func_get_arg(1);
return $this->setAttr($name, $value);
}
}

/**
* set or get the component style
*
* @access public
*
* @param $name style name
* @param $value style value, option
*
* @return string || AbstractComponent
*/
public function style() {
$name = func_get_arg(0);
if (func_num_args() == 1) {
return $this->getStyle($name);
}
else if (func_num_args() == 2) {
$value = func_get_arg(1);
return $this->setStyle($name, $value);
}
}

/**
* return the HTML string
*
* @access public
*
* @return string
**/
public function toString() {
thorw New AbstractException("subclass must be override this method!!");
}

/**
* render the component
*
* @access public
*
* @return void
**/
public function render() {
echo $this->toString();
}
}

 


标签: PHP 组件 编程技巧


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