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<?php
declare(strict_types=1);
/*
* This file is part of the TYPO3 CMS project.
*
* It is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, either version 2
* of the License, or any later version.
*
* For the full copyright and license information, please read the
* LICENSE.txt file that was distributed with this source code.
*
* The TYPO3 project - inspiring people to share!
*/
namespace TYPO3\CMS\Beuser\ViewHelpers;
use TYPO3\CMS\Beuser\Exception;
use TYPO3Fluid\Fluid\Core\Rendering\RenderingContextInterface;
use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;
use TYPO3Fluid\Fluid\Core\ViewHelper\Traits\CompileWithRenderStatic;
/**
* Get a value from an array by given key.
*
* @internal
*/
final class ArrayElementViewHelper extends AbstractViewHelper
{
use CompileWithRenderStatic;
public function initializeArguments(): void
{
$this->registerArgument('array', 'array', 'Array to search in', true);
$this->registerArgument('key', 'string', 'Key to return its value', true);
$this->registerArgument('subKey', 'string', 'If result of key access is an array, subkey can be used to fetch an element from this again', false, '');
}
/**
* Return array element by key. Accessed values must be scalar (string, int, float or double)
*
* @param array{'array': array, 'key': string, 'subKey': string} $arguments
* @throws Exception
*/
public static function renderStatic(array $arguments, \Closure $renderChildrenClosure, RenderingContextInterface $renderingContext): string
{
$array = $arguments['array'];
$key = $arguments['key'];
$subKey = $arguments['subKey'];
$result = '';
if (isset($array[$key])) {
$result = $array[$key];
if (is_array($result) && $subKey && isset($result[$subKey])) {
$result = $result[$subKey];
}
}
if (!is_scalar($result)) {
throw new Exception('Only scalar return values (string, int, float or double) are supported.', 1382284105);
}
return (string)$result;
}
}