<com:TContent ID="body" > <h1 id="2401">TExpression</h1> <com:DocLink ClassPath="System.Web.UI.WebControls.TExpression" /> <p> <tt>TExpression</tt> evaluates a PHP expression and displays the evaluation result. To specify the expression to be evaluated, set the <tt>Expression</tt> property. Note, <tt>TExpression</tt> evaluates the expression during the rendering control lifecycle. </p> <p> The context of the expression in a <tt>TExpression</tt> control is the control itself. That is, <tt>$this</tt> represents the control object if it is present in the expression. For example, the following template tag will display the title of the page containing the <tt>TExpression</tt> control. </p> <com:TTextHighlighter Language="prado" CssClass="source"> <com:TExpression Expression="$this->Page->Title" /> </com:TTextHighlighter> <p> Be aware, since <tt>TExpression</tt> allows execution of arbitrary PHP code, in general you should not use it to evaluate expressions submitted by your application users. </p> <com:RunBar PagePath="Controls.Samples.TExpression.Home" /> </com:TContent>