410 lines
16 KiB
PHP
410 lines
16 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\Debug;
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/**
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* Autoloader checking if the class is really defined in the file found.
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*
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* The ClassLoader will wrap all registered autoloaders
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* and will throw an exception if a file is found but does
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* not declare the class.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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* @author Christophe Coevoet <stof@notk.org>
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* @author Nicolas Grekas <p@tchwork.com>
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*/
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class DebugClassLoader
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{
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private $classLoader;
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private $isFinder;
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private $loaded = array();
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private static $caseCheck;
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private static $checkedClasses = array();
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private static $final = array();
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private static $finalMethods = array();
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private static $deprecated = array();
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private static $internal = array();
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private static $internalMethods = array();
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private static $php7Reserved = array('int' => 1, 'float' => 1, 'bool' => 1, 'string' => 1, 'true' => 1, 'false' => 1, 'null' => 1);
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private static $darwinCache = array('/' => array('/', array()));
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public function __construct(callable $classLoader)
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{
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$this->classLoader = $classLoader;
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$this->isFinder = is_array($classLoader) && method_exists($classLoader[0], 'findFile');
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if (!isset(self::$caseCheck)) {
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$file = file_exists(__FILE__) ? __FILE__ : rtrim(realpath('.'), DIRECTORY_SEPARATOR);
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$i = strrpos($file, DIRECTORY_SEPARATOR);
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$dir = substr($file, 0, 1 + $i);
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$file = substr($file, 1 + $i);
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$test = strtoupper($file) === $file ? strtolower($file) : strtoupper($file);
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$test = realpath($dir.$test);
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if (false === $test || false === $i) {
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// filesystem is case sensitive
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self::$caseCheck = 0;
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} elseif (substr($test, -strlen($file)) === $file) {
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// filesystem is case insensitive and realpath() normalizes the case of characters
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self::$caseCheck = 1;
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} elseif (false !== stripos(PHP_OS, 'darwin')) {
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// on MacOSX, HFS+ is case insensitive but realpath() doesn't normalize the case of characters
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self::$caseCheck = 2;
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} else {
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// filesystem case checks failed, fallback to disabling them
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self::$caseCheck = 0;
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}
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}
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}
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/**
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* Gets the wrapped class loader.
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*
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* @return callable The wrapped class loader
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*/
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public function getClassLoader()
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{
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return $this->classLoader;
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}
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/**
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* Wraps all autoloaders.
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*/
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public static function enable()
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{
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// Ensures we don't hit https://bugs.php.net/42098
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class_exists('Symfony\Component\Debug\ErrorHandler');
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class_exists('Psr\Log\LogLevel');
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if (!is_array($functions = spl_autoload_functions())) {
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return;
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}
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foreach ($functions as $function) {
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spl_autoload_unregister($function);
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}
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foreach ($functions as $function) {
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if (!is_array($function) || !$function[0] instanceof self) {
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$function = array(new static($function), 'loadClass');
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}
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spl_autoload_register($function);
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}
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}
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/**
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* Disables the wrapping.
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*/
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public static function disable()
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{
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if (!is_array($functions = spl_autoload_functions())) {
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return;
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}
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foreach ($functions as $function) {
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spl_autoload_unregister($function);
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}
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foreach ($functions as $function) {
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if (is_array($function) && $function[0] instanceof self) {
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$function = $function[0]->getClassLoader();
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}
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spl_autoload_register($function);
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}
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}
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/**
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* Loads the given class or interface.
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*
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* @param string $class The name of the class
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*
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* @return bool|null True, if loaded
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*
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* @throws \RuntimeException
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*/
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public function loadClass($class)
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{
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$e = error_reporting(error_reporting() | E_PARSE | E_ERROR | E_CORE_ERROR | E_COMPILE_ERROR);
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try {
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if ($this->isFinder && !isset($this->loaded[$class])) {
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$this->loaded[$class] = true;
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if ($file = $this->classLoader[0]->findFile($class) ?: false) {
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$wasCached = \function_exists('opcache_is_script_cached') && opcache_is_script_cached($file);
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require $file;
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if ($wasCached) {
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return;
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}
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}
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} else {
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call_user_func($this->classLoader, $class);
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$file = false;
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}
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} finally {
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error_reporting($e);
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}
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$this->checkClass($class, $file);
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}
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private function checkClass($class, $file = null)
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{
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$exists = null === $file || \class_exists($class, false) || \interface_exists($class, false) || \trait_exists($class, false);
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if (null !== $file && $class && '\\' === $class[0]) {
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$class = substr($class, 1);
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}
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if ($exists) {
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if (isset(self::$checkedClasses[$class])) {
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return;
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}
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self::$checkedClasses[$class] = true;
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$refl = new \ReflectionClass($class);
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if (null === $file && $refl->isInternal()) {
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return;
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}
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$name = $refl->getName();
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if ($name !== $class && 0 === \strcasecmp($name, $class)) {
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throw new \RuntimeException(sprintf('Case mismatch between loaded and declared class names: "%s" vs "%s".', $class, $name));
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}
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// Don't trigger deprecations for classes in the same vendor
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if (2 > $len = 1 + (\strpos($name, '\\') ?: \strpos($name, '_'))) {
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$len = 0;
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$ns = '';
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} else {
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$ns = \substr($name, 0, $len);
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}
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// Detect annotations on the class
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if (false !== $doc = $refl->getDocComment()) {
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foreach (array('final', 'deprecated', 'internal') as $annotation) {
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if (false !== \strpos($doc, $annotation) && preg_match('#\n \* @'.$annotation.'(?:( .+?)\.?)?\r?\n \*(?: @|/$)#s', $doc, $notice)) {
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self::${$annotation}[$name] = isset($notice[1]) ? preg_replace('#\s*\r?\n \* +#', ' ', $notice[1]) : '';
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}
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}
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}
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$parentAndTraits = \class_uses($name, false);
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if ($parent = \get_parent_class($class)) {
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$parentAndTraits[] = $parent;
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if (!isset(self::$checkedClasses[$parent])) {
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$this->checkClass($parent);
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}
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if (isset(self::$final[$parent])) {
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@trigger_error(sprintf('The "%s" class is considered final%s. It may change without further notice as of its next major version. You should not extend it from "%s".', $parent, self::$final[$parent], $name), E_USER_DEPRECATED);
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}
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}
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// Detect if the parent is annotated
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foreach ($parentAndTraits + $this->getOwnInterfaces($name, $parent) as $use) {
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if (!isset(self::$checkedClasses[$use])) {
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$this->checkClass($use);
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}
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if (isset(self::$deprecated[$use]) && \strncmp($ns, $use, $len)) {
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$type = class_exists($name, false) ? 'class' : (interface_exists($name, false) ? 'interface' : 'trait');
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$verb = class_exists($use, false) || interface_exists($name, false) ? 'extends' : (interface_exists($use, false) ? 'implements' : 'uses');
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@trigger_error(sprintf('The "%s" %s %s "%s" that is deprecated%s.', $name, $type, $verb, $use, self::$deprecated[$use]), E_USER_DEPRECATED);
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}
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if (isset(self::$internal[$use]) && \strncmp($ns, $use, $len)) {
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@trigger_error(sprintf('The "%s" %s is considered internal%s. It may change without further notice. You should not use it from "%s".', $use, class_exists($use, false) ? 'class' : (interface_exists($use, false) ? 'interface' : 'trait'), self::$internal[$use], $name), E_USER_DEPRECATED);
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}
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}
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// Inherit @final and @internal annotations for methods
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self::$finalMethods[$name] = array();
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self::$internalMethods[$name] = array();
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foreach ($parentAndTraits as $use) {
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foreach (array('finalMethods', 'internalMethods') as $property) {
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if (isset(self::${$property}[$use])) {
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self::${$property}[$name] = self::${$property}[$name] ? self::${$property}[$use] + self::${$property}[$name] : self::${$property}[$use];
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}
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}
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}
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$isClass = \class_exists($name, false);
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foreach ($refl->getMethods(\ReflectionMethod::IS_PUBLIC | \ReflectionMethod::IS_PROTECTED) as $method) {
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if ($method->class !== $name) {
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continue;
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}
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// Method from a trait
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if ($method->getFilename() !== $refl->getFileName()) {
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continue;
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}
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if ($isClass && $parent && isset(self::$finalMethods[$parent][$method->name])) {
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list($declaringClass, $message) = self::$finalMethods[$parent][$method->name];
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@trigger_error(sprintf('The "%s::%s()" method is considered final%s. It may change without further notice as of its next major version. You should not extend it from "%s".', $declaringClass, $method->name, $message, $name), E_USER_DEPRECATED);
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}
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foreach ($parentAndTraits as $use) {
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if (isset(self::$internalMethods[$use][$method->name])) {
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list($declaringClass, $message) = self::$internalMethods[$use][$method->name];
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if (\strncmp($ns, $declaringClass, $len)) {
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@trigger_error(sprintf('The "%s::%s()" method is considered internal%s. It may change without further notice. You should not extend it from "%s".', $declaringClass, $method->name, $message, $name), E_USER_DEPRECATED);
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}
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}
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}
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// Detect method annotations
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if (false === $doc = $method->getDocComment()) {
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continue;
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}
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foreach (array('final', 'internal') as $annotation) {
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if (false !== \strpos($doc, $annotation) && preg_match('#\n\s+\* @'.$annotation.'(?:( .+?)\.?)?\r?\n\s+\*(?: @|/$)#s', $doc, $notice)) {
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$message = isset($notice[1]) ? preg_replace('#\s*\r?\n \* +#', ' ', $notice[1]) : '';
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self::${$annotation.'Methods'}[$name][$method->name] = array($name, $message);
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}
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}
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}
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if (isset(self::$php7Reserved[\strtolower($refl->getShortName())])) {
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@trigger_error(sprintf('The "%s" class uses the reserved name "%s", it will break on PHP 7 and higher', $name, $refl->getShortName()), E_USER_DEPRECATED);
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}
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}
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if ($file) {
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if (!$exists) {
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if (false !== strpos($class, '/')) {
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throw new \RuntimeException(sprintf('Trying to autoload a class with an invalid name "%s". Be careful that the namespace separator is "\" in PHP, not "/".', $class));
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}
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throw new \RuntimeException(sprintf('The autoloader expected class "%s" to be defined in file "%s". The file was found but the class was not in it, the class name or namespace probably has a typo.', $class, $file));
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}
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if (self::$caseCheck) {
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$real = explode('\\', $class.strrchr($file, '.'));
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$tail = explode(DIRECTORY_SEPARATOR, str_replace('/', DIRECTORY_SEPARATOR, $file));
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$i = count($tail) - 1;
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$j = count($real) - 1;
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while (isset($tail[$i], $real[$j]) && $tail[$i] === $real[$j]) {
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--$i;
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--$j;
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}
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array_splice($tail, 0, $i + 1);
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}
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if (self::$caseCheck && $tail) {
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$tail = DIRECTORY_SEPARATOR.implode(DIRECTORY_SEPARATOR, $tail);
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$tailLen = strlen($tail);
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$real = $refl->getFileName();
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if (2 === self::$caseCheck) {
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// realpath() on MacOSX doesn't normalize the case of characters
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$i = 1 + strrpos($real, '/');
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$file = substr($real, $i);
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$real = substr($real, 0, $i);
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if (isset(self::$darwinCache[$real])) {
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$kDir = $real;
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} else {
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$kDir = strtolower($real);
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if (isset(self::$darwinCache[$kDir])) {
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$real = self::$darwinCache[$kDir][0];
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} else {
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$dir = getcwd();
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chdir($real);
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$real = getcwd().'/';
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chdir($dir);
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$dir = $real;
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$k = $kDir;
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$i = strlen($dir) - 1;
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while (!isset(self::$darwinCache[$k])) {
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self::$darwinCache[$k] = array($dir, array());
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self::$darwinCache[$dir] = &self::$darwinCache[$k];
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while ('/' !== $dir[--$i]) {
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}
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$k = substr($k, 0, ++$i);
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$dir = substr($dir, 0, $i--);
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}
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}
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}
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$dirFiles = self::$darwinCache[$kDir][1];
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if (isset($dirFiles[$file])) {
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$kFile = $file;
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} else {
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$kFile = strtolower($file);
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if (!isset($dirFiles[$kFile])) {
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foreach (scandir($real, 2) as $f) {
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if ('.' !== $f[0]) {
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$dirFiles[$f] = $f;
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if ($f === $file) {
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$kFile = $k = $file;
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} elseif ($f !== $k = strtolower($f)) {
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$dirFiles[$k] = $f;
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}
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}
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}
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self::$darwinCache[$kDir][1] = $dirFiles;
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}
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}
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$real .= $dirFiles[$kFile];
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}
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if (0 === substr_compare($real, $tail, -$tailLen, $tailLen, true)
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&& 0 !== substr_compare($real, $tail, -$tailLen, $tailLen, false)
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) {
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throw new \RuntimeException(sprintf('Case mismatch between class and real file names: "%s" vs "%s" in "%s".', substr($tail, -$tailLen + 1), substr($real, -$tailLen + 1), substr($real, 0, -$tailLen + 1)));
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}
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}
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}
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}
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/**
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* `class_implements` includes interfaces from the parents so we have to manually exclude them.
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*
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* @param string $class
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* @param string|false $parent
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*
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* @return string[]
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*/
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private function getOwnInterfaces($class, $parent)
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{
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$ownInterfaces = class_implements($class, false);
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if ($parent) {
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foreach (class_implements($parent, false) as $interface) {
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unset($ownInterfaces[$interface]);
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}
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}
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foreach ($ownInterfaces as $interface) {
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foreach (class_implements($interface) as $interface) {
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unset($ownInterfaces[$interface]);
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}
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}
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return $ownInterfaces;
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}
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}
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