silverstripe-framework/src/View/TemplateParser.php

<?php

namespace SilverStripe\View;

/**
 * This interface needs to be implemented by any template parser that is used in SSViewer
 */
interface TemplateParser
{

    /**
     * Compiles some passed template source code into the php code that will execute as per the template source.
     *
     * @param string $string The source of the template
     * @param string $templateName The name of the template, normally the filename the template source was loaded from
     * @param bool $includeDebuggingComments True is debugging comments should be included in the output
     * @return string The php that, when executed (via include or exec) will behave as per the template source
     */
    public function compileString($string, $templateName = "", $includeDebuggingComments = false);
}