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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\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 $loaded = array();
private static $caseCheck;
private static $checkedClasses = array();
private static $final = array();
private static $finalMethods = array();
private static $deprecated = array();
private static $internal = array();
private static $internalMethods = array();
private static $darwinCache = array('/' => array('/', array()));
public function __construct(callable $classLoader)
{
$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 The wrapped class loader
*/
public function getClassLoader()
{
return $this->classLoader;
}
/**
* Wraps all autoloaders.
*/
public static function enable()
{
// Ensures we don't hit https://bugs.php.net/42098
class_exists('Symfony\Component\Debug\ErrorHandler');
class_exists('Psr\Log\LogLevel');
if (!\is_array($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);
}
}
/**
* 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)
{
$e = error_reporting(error_reporting() | E_PARSE | E_ERROR | E_CORE_ERROR | E_COMPILE_ERROR);
try {
if ($this->isFinder && !isset($this->loaded[$class])) {
$this->loaded[$class] = true;
if ($file = $this->classLoader[0]->findFile($class) ?: false) {
$wasCached = \function_exists('opcache_is_script_cached') && @opcache_is_script_cached($file);
require $file;
if ($wasCached) {
return;
}
}
} else {
\call_user_func($this->classLoader, $class);
$file = false;
}
} finally {
error_reporting($e);
}
$this->checkClass($class, $file);
}
private function checkClass($class, $file = null)
{
$exists = null === $file || \class_exists($class, false) || \interface_exists($class, false) || \trait_exists($class, false);
if (null !== $file && $class && '\\' === $class[0]) {
$class = substr($class, 1);
}
if ($exists) {
if (isset(self::$checkedClasses[$class])) {
return;
}
self::$checkedClasses[$class] = true;
$refl = new \ReflectionClass($class);
if (null === $file && $refl->isInternal()) {
return;
}
$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));
}
// Don't trigger deprecations for classes in the same vendor
if (2 > $len = 1 + (\strpos($name, '\\') ?: \strpos($name, '_'))) {
$len = 0;
$ns = '';
} else {
$ns = \substr($name, 0, $len);
}
// Detect annotations on the class
if (false !== $doc = $refl->getDocComment()) {
foreach (array('final', 'deprecated', 'internal') as $annotation) {
if (false !== \strpos($doc, $annotation) && preg_match('#\n \* @'.$annotation.'(?:( .+?)\.?)?\r?\n \*(?: @|/$)#s', $doc, $notice)) {
self::${$annotation}[$name] = isset($notice[1]) ? preg_replace('#\s*\r?\n \* +#', ' ', $notice[1]) : '';
}
}
}
$parentAndTraits = \class_uses($name, false);
if ($parent = \get_parent_class($class)) {
$parentAndTraits[] = $parent;
if (!isset(self::$checkedClasses[$parent])) {
$this->checkClass($parent);
}
if (isset(self::$final[$parent])) {
@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], $name), E_USER_DEPRECATED);
}
}
// Detect if the parent is annotated
foreach ($parentAndTraits + $this->getOwnInterfaces($name, $parent) as $use) {
if (!isset(self::$checkedClasses[$use])) {
$this->checkClass($use);
}
if (isset(self::$deprecated[$use]) && \strncmp($ns, $use, $len)) {
$type = class_exists($name, false) ? 'class' : (interface_exists($name, false) ? 'interface' : 'trait');
$verb = class_exists($use, false) || interface_exists($name, false) ? 'extends' : (interface_exists($use, false) ? 'implements' : 'uses');
@trigger_error(sprintf('The "%s" %s %s "%s" that is deprecated%s.', $name, $type, $verb, $use, self::$deprecated[$use]), E_USER_DEPRECATED);
}
if (isset(self::$internal[$use]) && \strncmp($ns, $use, $len)) {
@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], $name), E_USER_DEPRECATED);
}
}
// Inherit @final and @internal annotations for methods
self::$finalMethods[$name] = array();
self::$internalMethods[$name] = array();
foreach ($parentAndTraits as $use) {
foreach (array('finalMethods', 'internalMethods') as $property) {
if (isset(self::${$property}[$use])) {
self::${$property}[$name] = self::${$property}[$name] ? self::${$property}[$use] + self::${$property}[$name] : self::${$property}[$use];
}
}
}
$isClass = \class_exists($name, false);
foreach ($refl->getMethods(\ReflectionMethod::IS_PUBLIC | \ReflectionMethod::IS_PROTECTED) as $method) {
if ($method->class !== $name) {
continue;
}
// Method from a trait
if ($method->getFilename() !== $refl->getFileName()) {
continue;
}
if ($isClass && $parent && isset(self::$finalMethods[$parent][$method->name])) {
list($declaringClass, $message) = self::$finalMethods[$parent][$method->name];
@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, $name), E_USER_DEPRECATED);
}
foreach ($parentAndTraits as $use) {
if (isset(self::$internalMethods[$use][$method->name])) {
list($declaringClass, $message) = self::$internalMethods[$use][$method->name];
if (\strncmp($ns, $declaringClass, $len)) {
@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);
}
}
}
// Detect method annotations
if (false === $doc = $method->getDocComment()) {
continue;
}
foreach (array('final', 'internal') as $annotation) {
if (false !== \strpos($doc, $annotation) && preg_match('#\n\s+\* @'.$annotation.'(?:( .+?)\.?)?\r?\n\s+\*(?: @|/$)#s', $doc, $notice)) {
$message = isset($notice[1]) ? preg_replace('#\s*\r?\n \* +#', ' ', $notice[1]) : '';
self::${$annotation.'Methods'}[$name][$method->name] = array($name, $message);
}
}
}
}
if ($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)));
}
}
}
}
/**
* `class_implements` includes interfaces from the parents so we have to manually exclude them.
*
* @param string $class
* @param string|false $parent
*
* @return string[]
*/
private function getOwnInterfaces($class, $parent)
{
$ownInterfaces = class_implements($class, false);
if ($parent) {
foreach (class_implements($parent, false) as $interface) {
unset($ownInterfaces[$interface]);
}
}
foreach ($ownInterfaces as $interface) {
foreach (class_implements($interface) as $interface) {
unset($ownInterfaces[$interface]);
}
}
return $ownInterfaces;
}
}