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<?php
/*
* This file belongs to the package "TYPO3 Fluid".
* See LICENSE.txt that was shipped with this package.
*/
namespace TYPO3Fluid\Fluid\ViewHelpers;
use TYPO3Fluid\Fluid\Core\Compiler\TemplateCompiler;
use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;
/**
* This ViewHelper prevents rendering of any content inside the tag.
*
* Contents of the comment will still be **parsed** thus throwing an
* Exception if it contains syntax errors. You can put child nodes in
* CDATA tags to avoid this.
*
* Using this ViewHelper won't have a notable effect on performance,
* especially once the template is parsed. However, it can lead to reduced
* readability. You can use layouts and partials to split a large template
* into smaller parts. Using self-descriptive names for the partials can
* make comments redundant.
*
* Examples
* ========
*
* Commenting out fluid code
* -------------------------
*
* ::
*
* Before
* <f:comment>
* This is completely hidden.
* <f:debug>This does not get rendered</f:debug>
* </f:comment>
* After
*
* Output::
*
* Before
* After
*
* Prevent parsing
* ---------------
*
* ::
*
* <f:comment><![CDATA[
* <f:some.invalid.syntax />
* ]]></f:comment>
*
* Output:
*
* Will be nothing.
*
* @api
*/
class CommentViewHelper extends AbstractViewHelper
{
/**
* @var bool
*/
protected $escapeChildren = false;
/**
* @var bool
*/
protected $escapeOutput = false;
public function render()
{
return '';
}
/**
* This VH does not ever output anything. We optimize compilation
* to always return an empty string.
*/
final public function convert(TemplateCompiler $templateCompiler): array
{
return [
'initialization' => '',
'execution' => '\'\'',
];
}
}