IconViewHelper.php

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<?php
namespace TYPO3\CMS\Reports\ViewHelpers;

class IconViewHelper extends \TYPO3\CMS\Fluid\ViewHelpers\Be\AbstractBackendViewHelper {

    public function render($icon, $title = '') {
        if (!empty($icon)) {
            $absIconPath = \TYPO3\CMS\Core\Utility\GeneralUtility::getFileAbsFilename($icon);
            if (file_exists($absIconPath)) {
                $icon = $GLOBALS['BACK_PATH'] . '../' . str_replace(PATH_site, '', $absIconPath);
            }
        } else {
            $icon = \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::extRelPath('reports') . 'ext_icon.png';
        }
        $content = '<img' . \TYPO3\CMS\Backend\Utility\IconUtility::skinImg($GLOBALS['BACK_PATH'], $icon, 'width="16" height="16"') . ' title="' . htmlspecialchars($title) . '" alt="' . htmlspecialchars($title) . '" />';
        return $content;
    }

}