PHP 组件化编程技巧_php技巧

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 <BR>/** <BR>* Component Library <BR>* <BR>* @author Chris Mao <BR>* @package Component <BR>* @description All components must be extened from the class <BR>* and override the both methods of toString. <BR>* @copyright Copyright (c) 2009 JueRui Soft Studio <BR>* <BR>**/ <BR>class AbstractComponent { <br><br>/* <BR>* @var _style the component style's array <BR>* <BR>* @access protected <BR>* <BR>*/ <BR>protected $_style = array(); <BR>/* <BR>* @var _attributes the component attribute's string <BR>* <BR>* @access protected <BR>* <BR>*/ <BR>protected $_attributes = array(); <br><br>/** <BR>* constructor function <BR>* <BR>* @access public <BR>* <BR>*/ <BR>public function __construct($options = null, $style = null) { <BR>if (!is_null($options) && (gettype($options) != "array")) { <BR>throw new Exception("The options must be a array!!"); <BR>} <BR>if (!empty($options) && is_array($options)) { <BR>if (array_key_exists("style", $options)) { <BR>if (is_array($options["style"])) { <BR>$this->_style = array_merge($this->_style, $options["style"]); <BR>} <BR>unset($options["style"]); <BR>} <BR>$this->_attributes = array_merge($this->_attributes, $options); <BR>} <BR>if (!empty($style) && is_array($style)) { <BR>$this->_style = array_merge($this->_style, $style); <BR>} <BR>} <br><br>/** <BR>* set the component attributes <BR>* <BR>* @access protected <BR>* <BR>* @param $name attribute name <BR>* @param $value attribute value, option <BR>* <BR>* @return AbstractComponent <BR>*/ <BR>protected function setAttr($name, $value) { <BR>if (array_key_exists($name, $this->_attributes)) { <BR>unset($this->_attributes[$name]); <BR>} <BR>$this->_attributes[$name] = $value; <BR>return $this; <BR>} <br><br>/** <BR>* get the component attributes' value <BR>* <BR>* @access protected <BR>* <BR>* @param $name attribute name <BR>* <BR>* @return string <BR>*/ <BR>protected function getAttr($name) { <BR>return array_key_exists($name, $this->_attributes) ? $this->_attributes[$name] : null; <BR>} <br><br>/** <BR>* set the component style <BR>* <BR>* @access protected <BR>* <BR>* @param $name style name <BR>* @param $value style value, option <BR>* <BR>* @return AbstractComponent <BR>*/ <BR>protected function setStyle($name, $value) { <BR>if (array_key_exists($name, $this->_style)) { <BR>unset($this->_style[$name]); <BR>} <BR>$this->_style[$name] = $value; <BR>return $this; <BR>} <br><br>/** <BR>* get the component style's value <BR>* <BR>* @access protected <BR>* <BR>* @param $name attribute name <BR>* <BR>* @return string <BR>*/ <BR>protected function getStyle($name) { <BR>return array_key_exists($name, $this->_style) ? $this->_style[$name] : null; <BR>} <br><br>/** <BR>* convert the component all attributes to string like name = "value" <BR>* <BR>* @access protected <BR>* <BR>* @return string <BR>*/ <BR>protected function attributeToString() { <BR>//$s = array_reduce(; <BR>$s = ""; <BR>foreach($this->_attributes as $key => $value) { <BR>$s .= " $key=\"$value\" "; <BR>} <BR>return $s; <BR>} <br><br>/** <BR>* convert the component style to string like style = "....." <BR>* <BR>* @access protected <BR>* <BR>* @return string <BR>*/ <BR>protected function styleToString() { <BR>if (empty($this->_style)) return ""; <BR>$s = ""; <BR>foreach($this->_style as $key => $value) { <BR>$s .= " $key: $value; "; <BR>} <BR>$s = " style=\"$s\" "; <BR>return $s; <BR>} <br><br>/** <BR>* set or get the component attributes <BR>* <BR>* @access public <BR>* <BR>* @param $name attribute name <BR>* @param $value attribute value, option <BR>* <BR>* @return string || AbstractComponent <BR>*/ <BR>public function attr() { <BR>$name = func_get_arg(0); <BR>if (func_num_args() == 1) { <BR>return $this->getAttr($name); <BR>} <BR>else if (func_num_args() == 2) { <BR>$value = func_get_arg(1); <BR>return $this->set<p style="color:transparent">。本文来源gao!%daima.com搞$代*!码网1</p><cite>搞代gaodaima码</cite>Attr($name, $value); <BR>} <BR>} <br><br>/** <BR>* set or get the component style <BR>* <BR>* @access public <BR>* <BR>* @param $name style name <BR>* @param $value style value, option <BR>* <BR>* @return string || AbstractComponent <BR>*/ <BR>public function style() { <BR>$name = func_get_arg(0); <BR>if (func_num_args() == 1) { <BR>return $this->getStyle($name); <BR>} <BR>else if (func_num_args() == 2) { <BR>$value = func_get_arg(1); <BR>return $this->setStyle($name, $value); <BR>} <BR>} <br><br>/** <BR>* return the HTML string <BR>* <BR>* @access public <BR>* <BR>* @return string <BR>**/ <BR>public function toString() { <BR>thorw New AbstractException("subclass must be override this method!!"); <BR>} <br><br>/** <BR>* render the component <BR>* <BR>* @access public <BR>* <BR>* @return void <BR>**/ <BR>public function render() { <BR>echo $this->toString(); <BR>} <BR>} <BR>

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