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