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- <?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\ClassLoader;
- /**
- * ClassLoader implements an PSR-0 class loader.
- *
- * See https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-0.md
- *
- * $loader = new ClassLoader();
- *
- * // register classes with namespaces
- * $loader->addPrefix('Symfony\Component', __DIR__.'/component');
- * $loader->addPrefix('Symfony', __DIR__.'/framework');
- *
- * // activate the autoloader
- * $loader->register();
- *
- * // to enable searching the include path (e.g. for PEAR packages)
- * $loader->setUseIncludePath(true);
- *
- * In this example, if you try to use a class in the Symfony\Component
- * namespace or one of its children (Symfony\Component\Console for instance),
- * the autoloader will first look for the class under the component/
- * directory, and it will then fallback to the framework/ directory if not
- * found before giving up.
- *
- * @author Fabien Potencier <fabien@symfony.com>
- * @author Jordi Boggiano <j.boggiano@seld.be>
- */
- class ClassLoader
- {
- private $prefixes = array();
- private $fallbackDirs = array();
- private $useIncludePath = false;
- /**
- * Returns prefixes.
- *
- * @return array
- */
- public function getPrefixes()
- {
- return $this->prefixes;
- }
- /**
- * Returns fallback directories.
- *
- * @return array
- */
- public function getFallbackDirs()
- {
- return $this->fallbackDirs;
- }
- /**
- * Adds prefixes.
- *
- * @param array $prefixes Prefixes to add
- */
- public function addPrefixes(array $prefixes)
- {
- foreach ($prefixes as $prefix => $path) {
- $this->addPrefix($prefix, $path);
- }
- }
- /**
- * Registers a set of classes.
- *
- * @param string $prefix The classes prefix
- * @param array|string $paths The location(s) of the classes
- */
- public function addPrefix($prefix, $paths)
- {
- if (!$prefix) {
- foreach ((array) $paths as $path) {
- $this->fallbackDirs[] = $path;
- }
- return;
- }
- if (isset($this->prefixes[$prefix])) {
- if (is_array($paths)) {
- $this->prefixes[$prefix] = array_unique(array_merge(
- $this->prefixes[$prefix],
- $paths
- ));
- } elseif (!in_array($paths, $this->prefixes[$prefix])) {
- $this->prefixes[$prefix][] = $paths;
- }
- } else {
- $this->prefixes[$prefix] = array_unique((array) $paths);
- }
- }
- /**
- * Turns on searching the include for class files.
- *
- * @param bool $useIncludePath
- */
- public function setUseIncludePath($useIncludePath)
- {
- $this->useIncludePath = (bool) $useIncludePath;
- }
- /**
- * Can be used to check if the autoloader uses the include path to check
- * for classes.
- *
- * @return bool
- */
- public function getUseIncludePath()
- {
- return $this->useIncludePath;
- }
- /**
- * Registers this instance as an autoloader.
- *
- * @param bool $prepend Whether to prepend the autoloader or not
- */
- public function register($prepend = false)
- {
- spl_autoload_register(array($this, 'loadClass'), true, $prepend);
- }
- /**
- * Unregisters this instance as an autoloader.
- */
- public function unregister()
- {
- spl_autoload_unregister(array($this, 'loadClass'));
- }
- /**
- * Loads the given class or interface.
- *
- * @param string $class The name of the class
- *
- * @return bool|null True, if loaded
- */
- public function loadClass($class)
- {
- if ($file = $this->findFile($class)) {
- require $file;
- return true;
- }
- }
- /**
- * Finds the path to the file where the class is defined.
- *
- * @param string $class The name of the class
- *
- * @return string|null The path, if found
- */
- public function findFile($class)
- {
- if (false !== $pos = strrpos($class, '\\')) {
- // namespaced class name
- $classPath = str_replace('\\', DIRECTORY_SEPARATOR, substr($class, 0, $pos)).DIRECTORY_SEPARATOR;
- $className = substr($class, $pos + 1);
- } else {
- // PEAR-like class name
- $classPath = null;
- $className = $class;
- }
- $classPath .= str_replace('_', DIRECTORY_SEPARATOR, $className).'.php';
- foreach ($this->prefixes as $prefix => $dirs) {
- if ($class === strstr($class, $prefix)) {
- foreach ($dirs as $dir) {
- if (file_exists($dir.DIRECTORY_SEPARATOR.$classPath)) {
- return $dir.DIRECTORY_SEPARATOR.$classPath;
- }
- }
- }
- }
- foreach ($this->fallbackDirs as $dir) {
- if (file_exists($dir.DIRECTORY_SEPARATOR.$classPath)) {
- return $dir.DIRECTORY_SEPARATOR.$classPath;
- }
- }
- if ($this->useIncludePath && $file = stream_resolve_include_path($classPath)) {
- return $file;
- }
- }
- }
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