Verzeichnisstruktur phpBB-3.2.0
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- 06.01.2017
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DebugClassLoader.php
001 <?php
002
003 /*
004 * This file is part of the Symfony package.
005 *
006 * (c) Fabien Potencier <fabien@symfony.com>
007 *
008 * For the full copyright and license information, please view the LICENSE
009 * file that was distributed with this source code.
010 */
011
012 namespace Symfony\Component\Debug;
013
014 /**
015 * Autoloader checking if the class is really defined in the file found.
016 *
017 * The ClassLoader will wrap all registered autoloaders
018 * and will throw an exception if a file is found but does
019 * not declare the class.
020 *
021 * @author Fabien Potencier <fabien@symfony.com>
022 * @author Christophe Coevoet <stof@notk.org>
023 * @author Nicolas Grekas <p@tchwork.com>
024 */
025 class DebugClassLoader
026 {
027 private $classLoader;
028 private $isFinder;
029 private $wasFinder;
030 private static $caseCheck;
031 private static $deprecated = array();
032 private static $php7Reserved = array('int', 'float', 'bool', 'string', 'true', 'false', 'null');
033 private static $darwinCache = array('/' => array('/', array()));
034
035 /**
036 * Constructor.
037 *
038 * @param callable|object $classLoader Passing an object is @deprecated since version 2.5 and support for it will be removed in 3.0
039 */
040 public function __construct($classLoader)
041 {
042 $this->wasFinder = is_object($classLoader) && method_exists($classLoader, 'findFile');
043
044 if ($this->wasFinder) {
045 @trigger_error('The '.__METHOD__.' method will no longer support receiving an object into its $classLoader argument in 3.0.', E_USER_DEPRECATED);
046 $this->classLoader = array($classLoader, 'loadClass');
047 $this->isFinder = true;
048 } else {
049 $this->classLoader = $classLoader;
050 $this->isFinder = is_array($classLoader) && method_exists($classLoader[0], 'findFile');
051 }
052
053 if (!isset(self::$caseCheck)) {
054 $file = file_exists(__FILE__) ? __FILE__ : rtrim(realpath('.'), DIRECTORY_SEPARATOR);
055 $i = strrpos($file, DIRECTORY_SEPARATOR);
056 $dir = substr($file, 0, 1 + $i);
057 $file = substr($file, 1 + $i);
058 $test = strtoupper($file) === $file ? strtolower($file) : strtoupper($file);
059 $test = realpath($dir.$test);
060
061 if (false === $test || false === $i) {
062 // filesystem is case sensitive
063 self::$caseCheck = 0;
064 } elseif (substr($test, -strlen($file)) === $file) {
065 // filesystem is case insensitive and realpath() normalizes the case of characters
066 self::$caseCheck = 1;
067 } elseif (false !== stripos(PHP_OS, 'darwin')) {
068 // on MacOSX, HFS+ is case insensitive but realpath() doesn't normalize the case of characters
069 self::$caseCheck = 2;
070 } else {
071 // filesystem case checks failed, fallback to disabling them
072 self::$caseCheck = 0;
073 }
074 }
075 }
076
077 /**
078 * Gets the wrapped class loader.
079 *
080 * @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
081 */
082 public function getClassLoader()
083 {
084 return $this->wasFinder ? $this->classLoader[0] : $this->classLoader;
085 }
086
087 /**
088 * Wraps all autoloaders.
089 */
090 public static function enable()
091 {
092 // Ensures we don't hit https://bugs.php.net/42098
093 class_exists('Symfony\Component\Debug\ErrorHandler');
094 class_exists('Psr\Log\LogLevel');
095
096 if (!is_array($functions = spl_autoload_functions())) {
097 return;
098 }
099
100 foreach ($functions as $function) {
101 spl_autoload_unregister($function);
102 }
103
104 foreach ($functions as $function) {
105 if (!is_array($function) || !$function[0] instanceof self) {
106 $function = array(new static($function), 'loadClass');
107 }
108
109 spl_autoload_register($function);
110 }
111 }
112
113 /**
114 * Disables the wrapping.
115 */
116 public static function disable()
117 {
118 if (!is_array($functions = spl_autoload_functions())) {
119 return;
120 }
121
122 foreach ($functions as $function) {
123 spl_autoload_unregister($function);
124 }
125
126 foreach ($functions as $function) {
127 if (is_array($function) && $function[0] instanceof self) {
128 $function = $function[0]->getClassLoader();
129 }
130
131 spl_autoload_register($function);
132 }
133 }
134
135 /**
136 * Finds a file by class name.
137 *
138 * @param string $class A class name to resolve to file
139 *
140 * @return string|null
141 *
142 * @deprecated since version 2.5, to be removed in 3.0.
143 */
144 public function findFile($class)
145 {
146 @trigger_error('The '.__METHOD__.' method is deprecated since version 2.5 and will be removed in 3.0.', E_USER_DEPRECATED);
147
148 if ($this->wasFinder) {
149 return $this->classLoader[0]->findFile($class);
150 }
151 }
152
153 /**
154 * Loads the given class or interface.
155 *
156 * @param string $class The name of the class
157 *
158 * @return bool|null True, if loaded
159 *
160 * @throws \RuntimeException
161 */
162 public function loadClass($class)
163 {
164 ErrorHandler::stackErrors();
165
166 try {
167 if ($this->isFinder) {
168 if ($file = $this->classLoader[0]->findFile($class)) {
169 require_once $file;
170 }
171 } else {
172 call_user_func($this->classLoader, $class);
173 $file = false;
174 }
175 } catch (\Exception $e) {
176 ErrorHandler::unstackErrors();
177
178 throw $e;
179 } catch (\Throwable $e) {
180 ErrorHandler::unstackErrors();
181
182 throw $e;
183 }
184
185 ErrorHandler::unstackErrors();
186
187 $exists = class_exists($class, false) || interface_exists($class, false) || (function_exists('trait_exists') && trait_exists($class, false));
188
189 if ('\\' === $class[0]) {
190 $class = substr($class, 1);
191 }
192
193 if ($exists) {
194 $refl = new \ReflectionClass($class);
195 $name = $refl->getName();
196
197 if ($name !== $class && 0 === strcasecmp($name, $class)) {
198 throw new \RuntimeException(sprintf('Case mismatch between loaded and declared class names: %s vs %s', $class, $name));
199 }
200
201 if (in_array(strtolower($refl->getShortName()), self::$php7Reserved)) {
202 @trigger_error(sprintf('%s uses a reserved class name (%s) that will break on PHP 7 and higher', $name, $refl->getShortName()), E_USER_DEPRECATED);
203 } elseif (preg_match('#\n \* @deprecated (.*?)\r?\n \*(?: @|/$)#s', $refl->getDocComment(), $notice)) {
204 self::$deprecated[$name] = preg_replace('#\s*\r?\n \* +#', ' ', $notice[1]);
205 } else {
206 if (2 > $len = 1 + (strpos($name, '\\', 1 + strpos($name, '\\')) ?: strpos($name, '_'))) {
207 $len = 0;
208 $ns = '';
209 } else {
210 switch ($ns = substr($name, 0, $len)) {
211 case 'Symfony\Bridge\\':
212 case 'Symfony\Bundle\\':
213 case 'Symfony\Component\\':
214 $ns = 'Symfony\\';
215 $len = strlen($ns);
216 break;
217 }
218 }
219 $parent = get_parent_class($class);
220
221 if (!$parent || strncmp($ns, $parent, $len)) {
222 if ($parent && isset(self::$deprecated[$parent]) && strncmp($ns, $parent, $len)) {
223 @trigger_error(sprintf('The %s class extends %s that is deprecated %s', $name, $parent, self::$deprecated[$parent]), E_USER_DEPRECATED);
224 }
225
226 $parentInterfaces = array();
227 $deprecatedInterfaces = array();
228 if ($parent) {
229 foreach (class_implements($parent) as $interface) {
230 $parentInterfaces[$interface] = 1;
231 }
232 }
233
234 foreach ($refl->getInterfaceNames() as $interface) {
235 if (isset(self::$deprecated[$interface]) && strncmp($ns, $interface, $len)) {
236 $deprecatedInterfaces[] = $interface;
237 }
238 foreach (class_implements($interface) as $interface) {
239 $parentInterfaces[$interface] = 1;
240 }
241 }
242
243 foreach ($deprecatedInterfaces as $interface) {
244 if (!isset($parentInterfaces[$interface])) {
245 @trigger_error(sprintf('The %s %s %s that is deprecated %s', $name, $refl->isInterface() ? 'interface extends' : 'class implements', $interface, self::$deprecated[$interface]), E_USER_DEPRECATED);
246 }
247 }
248 }
249 }
250 }
251
252 if ($file) {
253 if (!$exists) {
254 if (false !== strpos($class, '/')) {
255 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));
256 }
257
258 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, $file));
259 }
260 if (self::$caseCheck) {
261 $real = explode('\\', $class.strrchr($file, '.'));
262 $tail = explode(DIRECTORY_SEPARATOR, str_replace('/', DIRECTORY_SEPARATOR, $file));
263
264 $i = count($tail) - 1;
265 $j = count($real) - 1;
266
267 while (isset($tail[$i], $real[$j]) && $tail[$i] === $real[$j]) {
268 --$i;
269 --$j;
270 }
271
272 array_splice($tail, 0, $i + 1);
273 }
274 if (self::$caseCheck && $tail) {
275 $tail = DIRECTORY_SEPARATOR.implode(DIRECTORY_SEPARATOR, $tail);
276 $tailLen = strlen($tail);
277 $real = $refl->getFileName();
278
279 if (2 === self::$caseCheck) {
280 // realpath() on MacOSX doesn't normalize the case of characters
281
282 $i = 1 + strrpos($real, '/');
283 $file = substr($real, $i);
284 $real = substr($real, 0, $i);
285
286 if (isset(self::$darwinCache[$real])) {
287 $kDir = $real;
288 } else {
289 $kDir = strtolower($real);
290
291 if (isset(self::$darwinCache[$kDir])) {
292 $real = self::$darwinCache[$kDir][0];
293 } else {
294 $dir = getcwd();
295 chdir($real);
296 $real = getcwd().'/';
297 chdir($dir);
298
299 $dir = $real;
300 $k = $kDir;
301 $i = strlen($dir) - 1;
302 while (!isset(self::$darwinCache[$k])) {
303 self::$darwinCache[$k] = array($dir, array());
304 self::$darwinCache[$dir] = &self::$darwinCache[$k];
305
306 while ('/' !== $dir[--$i]) {
307 }
308 $k = substr($k, 0, ++$i);
309 $dir = substr($dir, 0, $i--);
310 }
311 }
312 }
313
314 $dirFiles = self::$darwinCache[$kDir][1];
315
316 if (isset($dirFiles[$file])) {
317 $kFile = $file;
318 } else {
319 $kFile = strtolower($file);
320
321 if (!isset($dirFiles[$kFile])) {
322 foreach (scandir($real, 2) as $f) {
323 if ('.' !== $f[0]) {
324 $dirFiles[$f] = $f;
325 if ($f === $file) {
326 $kFile = $k = $file;
327 } elseif ($f !== $k = strtolower($f)) {
328 $dirFiles[$k] = $f;
329 }
330 }
331 }
332 self::$darwinCache[$kDir][1] = $dirFiles;
333 }
334 }
335
336 $real .= $dirFiles[$kFile];
337 }
338
339 if (0 === substr_compare($real, $tail, -$tailLen, $tailLen, true)
340 && 0 !== substr_compare($real, $tail, -$tailLen, $tailLen, false)
341 ) {
342 throw new \RuntimeException(sprintf('Case mismatch between class and real file names: %s vs %s in %s', substr($tail, -$tailLen + 1), substr($real, -$tailLen + 1), substr($real, 0, -$tailLen + 1)));
343 }
344 }
345
346 return true;
347 }
348 }
349 }
350