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<?php
/**
* TExpression class file
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link https://github.com/pradosoft/prado
* @copyright Copyright © 2005-2016 The PRADO Group
* @license https://github.com/pradosoft/prado/blob/master/COPYRIGHT
* @package System.Web.UI.WebControls
*/
/**
* TExpression class
*
* TExpression evaluates a PHP expression and renders the result.
* The expression is evaluated during the rendering stage. The expression being
* evaluated can be set via the property {@link setExpression Expression}.
* The context of the expression evaluated is the TExpression object itself.
*
* Note, since TExpression allows evaluation of arbitrary PHP expression,
* make sure {@link setExpression Expression} does not come directly from user input.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @package System.Web.UI.WebControls
* @since 3.0
*/
class TExpression extends TControl
{
/**
* @var string PHP expression to be evaluated
*/
private $_e='';
/**
* @return string the expression to be evaluated
*/
public function getExpression()
{
return $this->_e;
}
/**
* @param string the expression to be evaluated
*/
public function setExpression($value)
{
$this->_e=$value;
}
/**
* Renders the evaluation result of the expression.
* @param THtmlWriter the writer used for the rendering purpose
*/
public function render($writer)
{
if($this->_e!=='')
$writer->write($this->evaluateExpression($this->_e));
}
}
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