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File: FileLocator.php
<?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\Config; use Symfony\Component\Config\Exception\FileLocatorFileNotFoundException; /** * FileLocator uses an array of pre-defined paths to find files. * * @author Fabien Potencier <fabien@symfony.com> */ class FileLocator implements FileLocatorInterface { protected $paths; /** * Constructor. * * @param string|array $paths A path or an array of paths where to look for resources */ public function __construct($paths = array()) { $this->paths = (array) $paths; } /** * {@inheritdoc} */ public function locate($name, $currentPath = null, $first = true) { if ('' == $name) { throw new \InvalidArgumentException('An empty file name is not valid to be located.'); } if ($this->isAbsolutePath($name)) { if (!file_exists($name)) { throw new FileLocatorFileNotFoundException(sprintf('The file "%s" does not exist.', $name), 0, null, array($name)); } return $name; } $paths = $this->paths; if (null !== $currentPath) { array_unshift($paths, $currentPath); } $paths = array_unique($paths); $filepaths = $notfound = array(); foreach ($paths as $path) { if (@file_exists($file = $path.DIRECTORY_SEPARATOR.$name)) { if (true === $first) { return $file; } $filepaths[] = $file; } else { $notfound[] = $file; } } if (!$filepaths) { throw new FileLocatorFileNotFoundException(sprintf('The file "%s" does not exist (in: %s).', $name, implode(', ', $paths)), 0, null, $notfound); } return $filepaths; } /** * Returns whether the file path is an absolute path. * * @param string $file A file path * * @return bool */ private function isAbsolutePath($file) { if ($file[0] === '/' || $file[0] === '\\' || (strlen($file) > 3 && ctype_alpha($file[0]) && $file[1] === ':' && ($file[2] === '\\' || $file[2] === '/') ) || null !== parse_url($file, PHP_URL_SCHEME) ) { return true; } return false; } }