tea/Classes/Utility/FileUtility.php

<?php
namespace OliverKlee\Tea\Utility;

/*
 * 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!
 */

/**
 * This class provides functions concerning files.
 *
 * @author Oliver Klee <typo3-coding@oliverklee.de>
 */
class FileUtility {
	/**
	 * Concatenates the files given as $sourceFilePaths and writes their contents into $targetFilePath.
	 *
	 * @param string   $targetFilePath
	 * @param string[] $sourceFilePaths
	 *
	 * @return void
	 *
	 * @throws \InvalidArgumentException
	 */
	public function concatenate($targetFilePath, array $sourceFilePaths) {
		if ($targetFilePath === '') {
			throw new \InvalidArgumentException('$targetFileName must not be empty.', 1445631384);
		}

		$concatenatedContents = '';
		foreach ($sourceFilePaths as $sourceFilePath) {
			$concatenatedContents .= file_get_contents($sourceFilePath);
		}

		file_put_contents($targetFilePath, $concatenatedContents);
	}
}