--- /dev/null
+<?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\Debug;
+
+/**
+ * Autoloader checking if the class is really defined in the file found.
+ *
+ * The ClassLoader will wrap all registered autoloaders
+ * and will throw an exception if a file is found but does
+ * not declare the class.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Christophe Coevoet <stof@notk.org>
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class DebugClassLoader
+{
+ private $classLoader;
+ private $isFinder;
+ private $wasFinder;
+ private static $caseCheck;
+ private static $deprecated = array();
+ private static $php7Reserved = array('int', 'float', 'bool', 'string', 'true', 'false', 'null');
+ private static $darwinCache = array('/' => array('/', array()));
+
+ /**
+ * Constructor.
+ *
+ * @param callable|object $classLoader Passing an object is @deprecated since version 2.5 and support for it will be removed in 3.0
+ */
+ public function __construct($classLoader)
+ {
+ $this->wasFinder = is_object($classLoader) && method_exists($classLoader, 'findFile');
+
+ if ($this->wasFinder) {
+ @trigger_error('The '.__METHOD__.' method will no longer support receiving an object into its $classLoader argument in 3.0.', E_USER_DEPRECATED);
+ $this->classLoader = array($classLoader, 'loadClass');
+ $this->isFinder = true;
+ } else {
+ $this->classLoader = $classLoader;
+ $this->isFinder = is_array($classLoader) && method_exists($classLoader[0], 'findFile');
+ }
+
+ if (!isset(self::$caseCheck)) {
+ $file = file_exists(__FILE__) ? __FILE__ : rtrim(realpath('.'), DIRECTORY_SEPARATOR);
+ $i = strrpos($file, DIRECTORY_SEPARATOR);
+ $dir = substr($file, 0, 1 + $i);
+ $file = substr($file, 1 + $i);
+ $test = strtoupper($file) === $file ? strtolower($file) : strtoupper($file);
+ $test = realpath($dir.$test);
+
+ if (false === $test || false === $i) {
+ // filesystem is case sensitive
+ self::$caseCheck = 0;
+ } elseif (substr($test, -strlen($file)) === $file) {
+ // filesystem is case insensitive and realpath() normalizes the case of characters
+ self::$caseCheck = 1;
+ } elseif (false !== stripos(PHP_OS, 'darwin')) {
+ // on MacOSX, HFS+ is case insensitive but realpath() doesn't normalize the case of characters
+ self::$caseCheck = 2;
+ } else {
+ // filesystem case checks failed, fallback to disabling them
+ self::$caseCheck = 0;
+ }
+ }
+ }
+
+ /**
+ * Gets the wrapped class loader.
+ *
+ * @return callable|object A class loader. Since version 2.5, returning an object is @deprecated and support for it will be removed in 3.0
+ */
+ public function getClassLoader()
+ {
+ return $this->wasFinder ? $this->classLoader[0] : $this->classLoader;
+ }
+
+ /**
+ * Wraps all autoloaders.
+ */
+ public static function enable()
+ {
+ // Ensures we don't hit https://bugs.php.net/42098
+ class_exists('Symfony\Component\Debug\ErrorHandler');
+ class_exists('Psr\Log\LogLevel');
+
+ if (!is_array($functions = spl_autoload_functions())) {
+ return;
+ }
+
+ foreach ($functions as $function) {
+ spl_autoload_unregister($function);
+ }
+
+ foreach ($functions as $function) {
+ if (!is_array($function) || !$function[0] instanceof self) {
+ $function = array(new static($function), 'loadClass');
+ }
+
+ spl_autoload_register($function);
+ }
+ }
+
+ /**
+ * Disables the wrapping.
+ */
+ public static function disable()
+ {
+ if (!is_array($functions = spl_autoload_functions())) {
+ return;
+ }
+
+ foreach ($functions as $function) {
+ spl_autoload_unregister($function);
+ }
+
+ foreach ($functions as $function) {
+ if (is_array($function) && $function[0] instanceof self) {
+ $function = $function[0]->getClassLoader();
+ }
+
+ spl_autoload_register($function);
+ }
+ }
+
+ /**
+ * Finds a file by class name.
+ *
+ * @param string $class A class name to resolve to file
+ *
+ * @return string|null
+ *
+ * @deprecated since version 2.5, to be removed in 3.0.
+ */
+ public function findFile($class)
+ {
+ @trigger_error('The '.__METHOD__.' method is deprecated since version 2.5 and will be removed in 3.0.', E_USER_DEPRECATED);
+
+ if ($this->wasFinder) {
+ return $this->classLoader[0]->findFile($class);
+ }
+ }
+
+ /**
+ * Loads the given class or interface.
+ *
+ * @param string $class The name of the class
+ *
+ * @return bool|null True, if loaded
+ *
+ * @throws \RuntimeException
+ */
+ public function loadClass($class)
+ {
+ ErrorHandler::stackErrors();
+
+ try {
+ if ($this->isFinder) {
+ if ($file = $this->classLoader[0]->findFile($class)) {
+ require_once $file;
+ }
+ } else {
+ call_user_func($this->classLoader, $class);
+ $file = false;
+ }
+ } catch (\Exception $e) {
+ ErrorHandler::unstackErrors();
+
+ throw $e;
+ } catch (\Throwable $e) {
+ ErrorHandler::unstackErrors();
+
+ throw $e;
+ }
+
+ ErrorHandler::unstackErrors();
+
+ $exists = class_exists($class, false) || interface_exists($class, false) || (function_exists('trait_exists') && trait_exists($class, false));
+
+ if ('\\' === $class[0]) {
+ $class = substr($class, 1);
+ }
+
+ if ($exists) {
+ $refl = new \ReflectionClass($class);
+ $name = $refl->getName();
+
+ if ($name !== $class && 0 === strcasecmp($name, $class)) {
+ throw new \RuntimeException(sprintf('Case mismatch between loaded and declared class names: %s vs %s', $class, $name));
+ }
+
+ if (in_array(strtolower($refl->getShortName()), self::$php7Reserved)) {
+ @trigger_error(sprintf('%s uses a reserved class name (%s) that will break on PHP 7 and higher', $name, $refl->getShortName()), E_USER_DEPRECATED);
+ } elseif (preg_match('#\n \* @deprecated (.*?)\r?\n \*(?: @|/$)#s', $refl->getDocComment(), $notice)) {
+ self::$deprecated[$name] = preg_replace('#\s*\r?\n \* +#', ' ', $notice[1]);
+ } else {
+ if (2 > $len = 1 + (strpos($name, '\\', 1 + strpos($name, '\\')) ?: strpos($name, '_'))) {
+ $len = 0;
+ $ns = '';
+ } else {
+ switch ($ns = substr($name, 0, $len)) {
+ case 'Symfony\Bridge\\':
+ case 'Symfony\Bundle\\':
+ case 'Symfony\Component\\':
+ $ns = 'Symfony\\';
+ $len = strlen($ns);
+ break;
+ }
+ }
+ $parent = get_parent_class($class);
+
+ if (!$parent || strncmp($ns, $parent, $len)) {
+ if ($parent && isset(self::$deprecated[$parent]) && strncmp($ns, $parent, $len)) {
+ @trigger_error(sprintf('The %s class extends %s that is deprecated %s', $name, $parent, self::$deprecated[$parent]), E_USER_DEPRECATED);
+ }
+
+ $parentInterfaces = array();
+ $deprecatedInterfaces = array();
+ if ($parent) {
+ foreach (class_implements($parent) as $interface) {
+ $parentInterfaces[$interface] = 1;
+ }
+ }
+
+ foreach ($refl->getInterfaceNames() as $interface) {
+ if (isset(self::$deprecated[$interface]) && strncmp($ns, $interface, $len)) {
+ $deprecatedInterfaces[] = $interface;
+ }
+ foreach (class_implements($interface) as $interface) {
+ $parentInterfaces[$interface] = 1;
+ }
+ }
+
+ foreach ($deprecatedInterfaces as $interface) {
+ if (!isset($parentInterfaces[$interface])) {
+ @trigger_error(sprintf('The %s %s %s that is deprecated %s', $name, $refl->isInterface() ? 'interface extends' : 'class implements', $interface, self::$deprecated[$interface]), E_USER_DEPRECATED);
+ }
+ }
+ }
+ }
+ }
+
+ if ($file) {
+ if (!$exists) {
+ if (false !== strpos($class, '/')) {
+ 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));
+ }
+
+ 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, $file));
+ }
+ if (self::$caseCheck) {
+ $real = explode('\\', $class.strrchr($file, '.'));
+ $tail = explode(DIRECTORY_SEPARATOR, str_replace('/', DIRECTORY_SEPARATOR, $file));
+
+ $i = count($tail) - 1;
+ $j = count($real) - 1;
+
+ while (isset($tail[$i], $real[$j]) && $tail[$i] === $real[$j]) {
+ --$i;
+ --$j;
+ }
+
+ array_splice($tail, 0, $i + 1);
+ }
+ if (self::$caseCheck && $tail) {
+ $tail = DIRECTORY_SEPARATOR.implode(DIRECTORY_SEPARATOR, $tail);
+ $tailLen = strlen($tail);
+ $real = $refl->getFileName();
+
+ if (2 === self::$caseCheck) {
+ // realpath() on MacOSX doesn't normalize the case of characters
+
+ $i = 1 + strrpos($real, '/');
+ $file = substr($real, $i);
+ $real = substr($real, 0, $i);
+
+ if (isset(self::$darwinCache[$real])) {
+ $kDir = $real;
+ } else {
+ $kDir = strtolower($real);
+
+ if (isset(self::$darwinCache[$kDir])) {
+ $real = self::$darwinCache[$kDir][0];
+ } else {
+ $dir = getcwd();
+ chdir($real);
+ $real = getcwd().'/';
+ chdir($dir);
+
+ $dir = $real;
+ $k = $kDir;
+ $i = strlen($dir) - 1;
+ while (!isset(self::$darwinCache[$k])) {
+ self::$darwinCache[$k] = array($dir, array());
+ self::$darwinCache[$dir] = &self::$darwinCache[$k];
+
+ while ('/' !== $dir[--$i]) {
+ }
+ $k = substr($k, 0, ++$i);
+ $dir = substr($dir, 0, $i--);
+ }
+ }
+ }
+
+ $dirFiles = self::$darwinCache[$kDir][1];
+
+ if (isset($dirFiles[$file])) {
+ $kFile = $file;
+ } else {
+ $kFile = strtolower($file);
+
+ if (!isset($dirFiles[$kFile])) {
+ foreach (scandir($real, 2) as $f) {
+ if ('.' !== $f[0]) {
+ $dirFiles[$f] = $f;
+ if ($f === $file) {
+ $kFile = $k = $file;
+ } elseif ($f !== $k = strtolower($f)) {
+ $dirFiles[$k] = $f;
+ }
+ }
+ }
+ self::$darwinCache[$kDir][1] = $dirFiles;
+ }
+ }
+
+ $real .= $dirFiles[$kFile];
+ }
+
+ if (0 === substr_compare($real, $tail, -$tailLen, $tailLen, true)
+ && 0 !== substr_compare($real, $tail, -$tailLen, $tailLen, false)
+ ) {
+ throw new \RuntimeException(sprintf('Case mismatch between class and real file names: %s vs %s in %s', substr($tail, -$tailLen + 1), substr($real, -$tailLen + 1), substr($real, 0, -$tailLen + 1)));
+ }
+ }
+
+ return true;
+ }
+ }
+}
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