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<com:TContent ID="body" ><h1 id="2401">TExpression</h1><com:DocLink ClassPath="System.Web.UI.WebControls.TExpression" /><p id="290254" class="block-content"><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 id="290255" class="block-content">The context of the expression in a <tt>TExpression</tt> control is the control itself. That is, <tt>$this</tt> represents the control object if it is present in the expression. For example, the following template tag will display the title of the page containing the <tt>TExpression</tt> control.</p><com:TTextHighlighter Language="prado" CssClass="source block-content" id="code_290104"><com:TExpression Expression="$this->Page->Title" /></com:TTextHighlighter><p id="290256" class="block-content">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" /><div class="last-modified">$Id: Expression.page 1650 2007-01-24 06:55:32Z wei $</div></com:TContent>