ImageMagickCommandsViewHelper.php

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<?php
namespace TYPO3\CMS\Install\ViewHelpers\Format;

class ImageMagickCommandsViewHelper extends \TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper {

    public function render(array $commands = array()) {
        $result = array();
        foreach ($commands as $commandGroup) {
            $result[] = 'Command: ' . $commandGroup[1];
            // If 3 elements: last one is result
            if (count($commandGroup) === 3) {
                $result[] = 'Result: ' . $commandGroup[2];
            }
        }
        return '<textarea rows="' . count($result) . '">' . implode(LF, $result) . '</textarea>';
    }
}