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<?php
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/**
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* TExpression class file
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @link http://www.pradosoft.com/
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* @copyright Copyright © 2005-2008 PradoSoft
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* @license http://www.pradosoft.com/license/
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* @version $Id: TExpression.php 2541 2008-10-21 15:05:13Z qiang.xue $
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* @package System.Web.UI.WebControls
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*/
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/**
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* TExpression class
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*
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* TExpression evaluates a PHP expression and renders the result.
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* The expression is evaluated during the rendering stage. The expression being
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* evaluated can be set via the property {@link setExpression Expression}.
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* The context of the expression evaluated is the TExpression object itself.
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*
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* Note, since TExpression allows evaluation of arbitrary PHP expression,
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* make sure {@link setExpression Expression} does not come directly from user input.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @version $Id: TExpression.php 2541 2008-10-21 15:05:13Z qiang.xue $
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* @package System.Web.UI.WebControls
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* @since 3.0
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*/
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class TExpression extends TControl
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{
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/**
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* @var string PHP expression to be evaluated
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*/
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private $_e='';
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/**
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* @return string the expression to be evaluated
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*/
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public function getExpression()
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{
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return $this->_e;
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}
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/**
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* @param string the expression to be evaluated
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*/
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public function setExpression($value)
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{
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$this->_e=$value;
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}
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/**
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* Renders the evaluation result of the expression.
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* @param THtmlWriter the writer used for the rendering purpose
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*/
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public function render($writer)
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{
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if($this->_e!=='')
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$writer->write($this->evaluateExpression($this->_e));
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}
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}
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