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    <h3>Editing: DebugClassLoader.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier &lt;fabien@symfony.com&gt;
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\ErrorHandler;

use Composer\InstalledVersions;
use Doctrine\Common\Persistence\Proxy as LegacyProxy;
use Doctrine\Persistence\Proxy;
use Mockery\MockInterface;
use Phake\IMock;
use PHPUnit\Framework\MockObject\Matcher\StatelessInvocation;
use PHPUnit\Framework\MockObject\MockObject;
use Prophecy\Prophecy\ProphecySubjectInterface;
use ProxyManager\Proxy\ProxyInterface;
use Symfony\Component\ErrorHandler\Internal\TentativeTypes;
use Symfony\Component\HttpClient\HttplugClient;

/**
 * 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.
 *
 * It can also patch classes to turn docblocks into actual return types.
 * This behavior is controlled by the SYMFONY_PATCH_TYPE_DECLARATIONS env var,
 * which is a url-encoded array with the follow parameters:
 *  - &quot;force&quot;: any value enables deprecation notices - can be any of:
 *      - &quot;phpdoc&quot; to patch only docblock annotations
 *      - &quot;2&quot; to add all possible return types
 *      - &quot;1&quot; to add return types but only to tests/final/internal/private methods
 *  - &quot;php&quot;: the target version of PHP - e.g. &quot;7.1&quot; doesn't generate &quot;object&quot; types
 *  - &quot;deprecations&quot;: &quot;1&quot; to trigger a deprecation notice when a child class misses a
 *                    return type while the parent declares an &quot;@return&quot; annotation
 *
 * Note that patching doesn't care about any coding style so you'd better to run
 * php-cs-fixer after, with rules &quot;phpdoc_trim_consecutive_blank_line_separation&quot;
 * and &quot;no_superfluous_phpdoc_tags&quot; enabled typically.
 *
 * @author Fabien Potencier &lt;fabien@symfony.com&gt;
 * @author Christophe Coevoet &lt;stof@notk.org&gt;
 * @author Nicolas Grekas &lt;p@tchwork.com&gt;
 * @author Guilhem Niot &lt;guilhem.niot@gmail.com&gt;
 */
class DebugClassLoader
{
    private const SPECIAL_RETURN_TYPES = [
        'void' =&gt; 'void',
        'null' =&gt; 'null',
        'resource' =&gt; 'resource',
        'boolean' =&gt; 'bool',
        'true' =&gt; 'true',
        'false' =&gt; 'false',
        'integer' =&gt; 'int',
        'array' =&gt; 'array',
        'bool' =&gt; 'bool',
        'callable' =&gt; 'callable',
        'float' =&gt; 'float',
        'int' =&gt; 'int',
        'iterable' =&gt; 'iterable',
        'object' =&gt; 'object',
        'string' =&gt; 'string',
        'self' =&gt; 'self',
        'parent' =&gt; 'parent',
        'mixed' =&gt; 'mixed',
        'static' =&gt; 'static',
        '$this' =&gt; 'static',
        'list' =&gt; 'array',
        'class-string' =&gt; 'string',
        'never' =&gt; 'never',
    ];

    private const BUILTIN_RETURN_TYPES = [
        'void' =&gt; true,
        'array' =&gt; true,
        'false' =&gt; true,
        'bool' =&gt; true,
        'callable' =&gt; true,
        'float' =&gt; true,
        'int' =&gt; true,
        'iterable' =&gt; true,
        'object' =&gt; true,
        'string' =&gt; true,
        'self' =&gt; true,
        'parent' =&gt; true,
        'mixed' =&gt; true,
        'static' =&gt; true,
        'null' =&gt; true,
        'true' =&gt; true,
        'never' =&gt; true,
    ];

    private const MAGIC_METHODS = [
        '__isset' =&gt; 'bool',
        '__sleep' =&gt; 'array',
        '__toString' =&gt; 'string',
        '__debugInfo' =&gt; 'array',
        '__serialize' =&gt; 'array',
    ];

    private $classLoader;
    private $isFinder;
    private $loaded = [];
    private $patchTypes;

    private static $caseCheck;
    private static $checkedClasses = [];
    private static $final = [];
    private static $finalMethods = [];
    private static $deprecated = [];
    private static $internal = [];
    private static $internalMethods = [];
    private static $annotatedParameters = [];
    private static $darwinCache = ['/' =&gt; ['/', []]];
    private static $method = [];
    private static $returnTypes = [];
    private static $methodTraits = [];
    private static $fileOffsets = [];

    public function __construct(callable $classLoader)
    {
        $this-&gt;classLoader = $classLoader;
        $this-&gt;isFinder = \is_array($classLoader) &amp;&amp; method_exists($classLoader[0], 'findFile');
        parse_str(getenv('SYMFONY_PATCH_TYPE_DECLARATIONS') ?: '', $this-&gt;patchTypes);
        $this-&gt;patchTypes += [
            'force' =&gt; null,
            'php' =&gt; \PHP_MAJOR_VERSION.'.'.\PHP_MINOR_VERSION,
            'deprecations' =&gt; \PHP_VERSION_ID &gt;= 70400,
        ];

        if ('phpdoc' === $this-&gt;patchTypes['force']) {
            $this-&gt;patchTypes['force'] = 'docblock';
        }

        if (!isset(self::$caseCheck)) {
            $file = is_file(__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 ('Darwin' === \PHP_OS_FAMILY) {
                // 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;
            }
        }
    }

    public function getClassLoader(): callable
    {
        return $this-&gt;classLoader;
    }

    /**
     * Wraps all autoloaders.
     */
    public static function enable(): void
    {
        // Ensures we don't hit https://bugs.php.net/42098
        class_exists(\Symfony\Component\ErrorHandler\ErrorHandler::class);
        class_exists(\Psr\Log\LogLevel::class);

        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) {
                $function = [new static($function), 'loadClass'];
            }

            spl_autoload_register($function);
        }
    }

    /**
     * Disables the wrapping.
     */
    public static function disable(): void
    {
        if (!\is_array($functions = spl_autoload_functions())) {
            return;
        }

        foreach ($functions as $function) {
            spl_autoload_unregister($function);
        }

        foreach ($functions as $function) {
            if (\is_array($function) &amp;&amp; $function[0] instanceof self) {
                $function = $function[0]-&gt;getClassLoader();
            }

            spl_autoload_register($function);
        }
    }

    public static function checkClasses(): bool
    {
        if (!\is_array($functions = spl_autoload_functions())) {
            return false;
        }

        $loader = null;

        foreach ($functions as $function) {
            if (\is_array($function) &amp;&amp; $function[0] instanceof self) {
                $loader = $function[0];
                break;
            }
        }

        if (null === $loader) {
            return false;
        }

        static $offsets = [
            'get_declared_interfaces' =&gt; 0,
            'get_declared_traits' =&gt; 0,
            'get_declared_classes' =&gt; 0,
        ];

        foreach ($offsets as $getSymbols =&gt; $i) {
            $symbols = $getSymbols();

            for (; $i &lt; \count($symbols); ++$i) {
                if (!is_subclass_of($symbols[$i], MockObject::class)
                    &amp;&amp; !is_subclass_of($symbols[$i], ProphecySubjectInterface::class)
                    &amp;&amp; !is_subclass_of($symbols[$i], Proxy::class)
                    &amp;&amp; !is_subclass_of($symbols[$i], ProxyInterface::class)
                    &amp;&amp; !is_subclass_of($symbols[$i], LegacyProxy::class)
                    &amp;&amp; !is_subclass_of($symbols[$i], MockInterface::class)
                    &amp;&amp; !is_subclass_of($symbols[$i], IMock::class)
                ) {
                    $loader-&gt;checkClass($symbols[$i]);
                }
            }

            $offsets[$getSymbols] = $i;
        }

        return true;
    }

    public function findFile(string $class): ?string
    {
        return $this-&gt;isFinder ? ($this-&gt;classLoader[0]-&gt;findFile($class) ?: null) : null;
    }

    /**
     * Loads the given class or interface.
     *
     * @throws \RuntimeException
     */
    public function loadClass(string $class): void
    {
        $e = error_reporting(error_reporting() | \E_PARSE | \E_ERROR | \E_CORE_ERROR | \E_COMPILE_ERROR);

        try {
            if ($this-&gt;isFinder &amp;&amp; !isset($this-&gt;loaded[$class])) {
                $this-&gt;loaded[$class] = true;
                if (!$file = $this-&gt;classLoader[0]-&gt;findFile($class) ?: '') {
                    // no-op
                } elseif (\function_exists('opcache_is_script_cached') &amp;&amp; @opcache_is_script_cached($file)) {
                    include $file;

                    return;
                } elseif (false === include $file) {
                    return;
                }
            } else {
                ($this-&gt;classLoader)($class);
                $file = '';
            }
        } finally {
            error_reporting($e);
        }

        $this-&gt;checkClass($class, $file);
    }

    private function checkClass(string $class, ?string $file = null): void
    {
        $exists = null === $file || class_exists($class, false) || interface_exists($class, false) || trait_exists($class, false);

        if (null !== $file &amp;&amp; $class &amp;&amp; '\\' === $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 &amp;&amp; $refl-&gt;isInternal()) {
                return;
            }
            $name = $refl-&gt;getName();

            if ($name !== $class &amp;&amp; 0 === strcasecmp($name, $class)) {
                throw new \RuntimeException(sprintf('Case mismatch between loaded and declared class names: &quot;%s&quot; vs &quot;%s&quot;.', $class, $name));
            }

            $deprecations = $this-&gt;checkAnnotations($refl, $name);

            foreach ($deprecations as $message) {
                @trigger_error($message, \E_USER_DEPRECATED);
            }
        }

        if (!$file) {
            return;
        }

        if (!$exists) {
            if (false !== strpos($class, '/')) {
                throw new \RuntimeException(sprintf('Trying to autoload a class with an invalid name &quot;%s&quot;. Be careful that the namespace separator is &quot;\&quot; in PHP, not &quot;/&quot;.', $class));
            }

            throw new \RuntimeException(sprintf('The autoloader expected class &quot;%s&quot; to be defined in file &quot;%s&quot;. 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 &amp;&amp; $message = $this-&gt;checkCase($refl, $file, $class)) {
            throw new \RuntimeException(sprintf('Case mismatch between class and real file names: &quot;%s&quot; vs &quot;%s&quot; in &quot;%s&quot;.', $message[0], $message[1], $message[2]));
        }
    }

    public function checkAnnotations(\ReflectionClass $refl, string $class): array
    {
        if (
            'Symfony\Bridge\PhpUnit\Legacy\SymfonyTestsListenerForV7' === $class
            || 'Symfony\Bridge\PhpUnit\Legacy\SymfonyTestsListenerForV6' === $class
        ) {
            return [];
        }
        $deprecations = [];

        $className = false !== strpos($class, &quot;@anonymous\0&quot;) ? (get_parent_class($class) ?: key(class_implements($class)) ?: 'class').'@anonymous' : $class;

        // Don't trigger deprecations for classes in the same vendor
        if ($class !== $className) {
            $vendor = preg_match('/^namespace ([^;\\\\\s]++)[;\\\\]/m', @file_get_contents($refl-&gt;getFileName()), $vendor) ? $vendor[1].'\\' : '';
            $vendorLen = \strlen($vendor);
        } elseif (2 &gt; $vendorLen = 1 + (strpos($class, '\\') ?: strpos($class, '_'))) {
            $vendorLen = 0;
            $vendor = '';
        } else {
            $vendor = str_replace('_', '\\', substr($class, 0, $vendorLen));
        }

        $parent = get_parent_class($class) ?: null;
        self::$returnTypes[$class] = [];
        $classIsTemplate = false;

        // Detect annotations on the class
        if ($doc = $this-&gt;parsePhpDoc($refl)) {
            $classIsTemplate = isset($doc['template']);

            foreach (['final', 'deprecated', 'internal'] as $annotation) {
                if (null !== $description = $doc[$annotation][0] ?? null) {
                    self::${$annotation}[$class] = '' !== $description ? ' '.$description.(preg_match('/[.!]$/', $description) ? '' : '.') : '.';
                }
            }

            if ($refl-&gt;isInterface() &amp;&amp; isset($doc['method'])) {
                foreach ($doc['method'] as $name =&gt; [$static, $returnType, $signature, $description]) {
                    self::$method[$class][] = [$class, $static, $returnType, $name.$signature, $description];

                    if ('' !== $returnType) {
                        $this-&gt;setReturnType($returnType, $refl-&gt;name, $name, $refl-&gt;getFileName(), $parent);
                    }
                }
            }
        }

        $parentAndOwnInterfaces = $this-&gt;getOwnInterfaces($class, $parent);
        if ($parent) {
            $parentAndOwnInterfaces[$parent] = $parent;

            if (!isset(self::$checkedClasses[$parent])) {
                $this-&gt;checkClass($parent);
            }

            if (isset(self::$final[$parent])) {
                $deprecations[] = sprintf('The &quot;%s&quot; class is considered final%s It may change without further notice as of its next major version. You should not extend it from &quot;%s&quot;.', $parent, self::$final[$parent], $className);
            }
        }

        // Detect if the parent is annotated
        foreach ($parentAndOwnInterfaces + class_uses($class, false) as $use) {
            if (!isset(self::$checkedClasses[$use])) {
                $this-&gt;checkClass($use);
            }
            if (isset(self::$deprecated[$use]) &amp;&amp; strncmp($vendor, str_replace('_', '\\', $use), $vendorLen) &amp;&amp; !isset(self::$deprecated[$class])
                &amp;&amp; !(HttplugClient::class === $class &amp;&amp; \in_array($use, [\Http\Client\HttpClient::class, \Http\Message\RequestFactory::class, \Http\Message\StreamFactory::class, \Http\Message\UriFactory::class], true))
            ) {
                $type = class_exists($class, false) ? 'class' : (interface_exists($class, false) ? 'interface' : 'trait');
                $verb = class_exists($use, false) || interface_exists($class, false) ? 'extends' : (interface_exists($use, false) ? 'implements' : 'uses');

                $deprecations[] = sprintf('The &quot;%s&quot; %s %s &quot;%s&quot; that is deprecated%s', $className, $type, $verb, $use, self::$deprecated[$use]);
            }
            if (isset(self::$internal[$use]) &amp;&amp; strncmp($vendor, str_replace('_', '\\', $use), $vendorLen)) {
                $deprecations[] = sprintf('The &quot;%s&quot; %s is considered internal%s It may change without further notice. You should not use it from &quot;%s&quot;.', $use, class_exists($use, false) ? 'class' : (interface_exists($use, false) ? 'interface' : 'trait'), self::$internal[$use], $className);
            }
            if (isset(self::$method[$use])) {
                if ($refl-&gt;isAbstract()) {
                    if (isset(self::$method[$class])) {
                        self::$method[$class] = array_merge(self::$method[$class], self::$method[$use]);
                    } else {
                        self::$method[$class] = self::$method[$use];
                    }
                } elseif (!$refl-&gt;isInterface()) {
                    if (!strncmp($vendor, str_replace('_', '\\', $use), $vendorLen)
                        &amp;&amp; 0 === strpos($className, 'Symfony\\')
                        &amp;&amp; (!class_exists(InstalledVersions::class)
                            || 'symfony/symfony' !== InstalledVersions::getRootPackage()['name'])
                    ) {
                        // skip &quot;same vendor&quot; @method deprecations for Symfony\* classes unless symfony/symfony is being tested
                        continue;
                    }
                    $hasCall = $refl-&gt;hasMethod('__call');
                    $hasStaticCall = $refl-&gt;hasMethod('__callStatic');
                    foreach (self::$method[$use] as [$interface, $static, $returnType, $name, $description]) {
                        if ($static ? $hasStaticCall : $hasCall) {
                            continue;
                        }
                        $realName = substr($name, 0, strpos($name, '('));
                        if (!$refl-&gt;hasMethod($realName) || !($methodRefl = $refl-&gt;getMethod($realName))-&gt;isPublic() || ($static &amp;&amp; !$methodRefl-&gt;isStatic()) || (!$static &amp;&amp; $methodRefl-&gt;isStatic())) {
                            $deprecations[] = sprintf('Class &quot;%s&quot; should implement method &quot;%s::%s%s&quot;%s', $className, ($static ? 'static ' : '').$interface, $name, $returnType ? ': '.$returnType : '', null === $description ? '.' : ': '.$description);
                        }
                    }
                }
            }
        }

        if (trait_exists($class)) {
            $file = $refl-&gt;getFileName();

            foreach ($refl-&gt;getMethods() as $method) {
                if ($method-&gt;getFileName() === $file) {
                    self::$methodTraits[$file][$method-&gt;getStartLine()] = $class;
                }
            }

            return $deprecations;
        }

        // Inherit @final, @internal, @param and @return annotations for methods
        self::$finalMethods[$class] = [];
        self::$internalMethods[$class] = [];
        self::$annotatedParameters[$class] = [];
        foreach ($parentAndOwnInterfaces as $use) {
            foreach (['finalMethods', 'internalMethods', 'annotatedParameters', 'returnTypes'] as $property) {
                if (isset(self::${$property}[$use])) {
                    self::${$property}[$class] = self::${$property}[$class] ? self::${$property}[$use] + self::${$property}[$class] : self::${$property}[$use];
                }
            }

            if (null !== (TentativeTypes::RETURN_TYPES[$use] ?? null)) {
                foreach (TentativeTypes::RETURN_TYPES[$use] as $method =&gt; $returnType) {
                    $returnType = explode('|', $returnType);
                    foreach ($returnType as $i =&gt; $t) {
                        if ('?' !== $t &amp;&amp; !isset(self::BUILTIN_RETURN_TYPES[$t])) {
                            $returnType[$i] = '\\'.$t;
                        }
                    }
                    $returnType = implode('|', $returnType);

                    self::$returnTypes[$class] += [$method =&gt; [$returnType, 0 === strpos($returnType, '?') ? substr($returnType, 1).'|null' : $returnType, $use, '']];
                }
            }
        }

        foreach ($refl-&gt;getMethods() as $method) {
            if ($method-&gt;class !== $class) {
                continue;
            }

            if (null === $ns = self::$methodTraits[$method-&gt;getFileName()][$method-&gt;getStartLine()] ?? null) {
                $ns = $vendor;
                $len = $vendorLen;
            } elseif (2 &gt; $len = 1 + (strpos($ns, '\\') ?: strpos($ns, '_'))) {
                $len = 0;
                $ns = '';
            } else {
                $ns = str_replace('_', '\\', substr($ns, 0, $len));
            }

            if ($parent &amp;&amp; isset(self::$finalMethods[$parent][$method-&gt;name])) {
                [$declaringClass, $message] = self::$finalMethods[$parent][$method-&gt;name];
                $deprecations[] = sprintf('The &quot;%s::%s()&quot; method is considered final%s It may change without further notice as of its next major version. You should not extend it from &quot;%s&quot;.', $declaringClass, $method-&gt;name, $message, $className);
            }

            if (isset(self::$internalMethods[$class][$method-&gt;name])) {
                [$declaringClass, $message] = self::$internalMethods[$class][$method-&gt;name];
                if (strncmp($ns, $declaringClass, $len)) {
                    $deprecations[] = sprintf('The &quot;%s::%s()&quot; method is considered internal%s It may change without further notice. You should not extend it from &quot;%s&quot;.', $declaringClass, $method-&gt;name, $message, $className);
                }
            }

            // To read method annotations
            $doc = $this-&gt;parsePhpDoc($method);

            if (($classIsTemplate || isset($doc['template'])) &amp;&amp; $method-&gt;hasReturnType()) {
                unset($doc['return']);
            }

            if (isset(self::$annotatedParameters[$class][$method-&gt;name])) {
                $definedParameters = [];
                foreach ($method-&gt;getParameters() as $parameter) {
                    $definedParameters[$parameter-&gt;name] = true;
                }

                foreach (self::$annotatedParameters[$class][$method-&gt;name] as $parameterName =&gt; $deprecation) {
                    if (!isset($definedParameters[$parameterName]) &amp;&amp; !isset($doc['param'][$parameterName])) {
                        $deprecations[] = sprintf($deprecation, $className);
                    }
                }
            }

            $forcePatchTypes = $this-&gt;patchTypes['force'];

            if ($canAddReturnType = null !== $forcePatchTypes &amp;&amp; false === strpos($method-&gt;getFileName(), \DIRECTORY_SEPARATOR.'vendor'.\DIRECTORY_SEPARATOR)) {
                if ('void' !== (self::MAGIC_METHODS[$method-&gt;name] ?? 'void')) {
                    $this-&gt;patchTypes['force'] = $forcePatchTypes ?: 'docblock';
                }

                $canAddReturnType = 2 === (int) $forcePatchTypes
                    || false !== stripos($method-&gt;getFileName(), \DIRECTORY_SEPARATOR.'Tests'.\DIRECTORY_SEPARATOR)
                    || $refl-&gt;isFinal()
                    || $method-&gt;isFinal()
                    || $method-&gt;isPrivate()
                    || ('.' === (self::$internal[$class] ?? null) &amp;&amp; !$refl-&gt;isAbstract())
                    || '.' === (self::$final[$class] ?? null)
                    || '' === ($doc['final'][0] ?? null)
                    || '' === ($doc['internal'][0] ?? null)
                ;
            }

            if (null !== ($returnType = self::$returnTypes[$class][$method-&gt;name] ?? null) &amp;&amp; 'docblock' === $this-&gt;patchTypes['force'] &amp;&amp; !$method-&gt;hasReturnType() &amp;&amp; isset(TentativeTypes::RETURN_TYPES[$returnType[2]][$method-&gt;name])) {
                $this-&gt;patchReturnTypeWillChange($method);
            }

            if (null !== ($returnType ?? $returnType = self::MAGIC_METHODS[$method-&gt;name] ?? null) &amp;&amp; !$method-&gt;hasReturnType() &amp;&amp; !isset($doc['return'])) {
                [$normalizedType, $returnType, $declaringClass, $declaringFile] = \is_string($returnType) ? [$returnType, $returnType, '', ''] : $returnType;

                if ($canAddReturnType &amp;&amp; 'docblock' !== $this-&gt;patchTypes['force']) {
                    $this-&gt;patchMethod($method, $returnType, $declaringFile, $normalizedType);
                }
                if (!isset($doc['deprecated']) &amp;&amp; strncmp($ns, $declaringClass, $len)) {
                    if ('docblock' === $this-&gt;patchTypes['force']) {
                        $this-&gt;patchMethod($method, $returnType, $declaringFile, $normalizedType);
                    } elseif ('' !== $declaringClass &amp;&amp; $this-&gt;patchTypes['deprecations']) {
                        $deprecations[] = sprintf('Method &quot;%s::%s()&quot; might add &quot;%s&quot; as a native return type declaration in the future. Do the same in %s &quot;%s&quot; now to avoid errors or add an explicit @return annotation to suppress this message.', $declaringClass, $method-&gt;name, $normalizedType, interface_exists($declaringClass) ? 'implementation' : 'child class', $className);
                    }
                }
            }

            if (!$doc) {
                $this-&gt;patchTypes['force'] = $forcePatchTypes;

                continue;
            }

            if (isset($doc['return']) || 'void' !== (self::MAGIC_METHODS[$method-&gt;name] ?? 'void')) {
                $this-&gt;setReturnType($doc['return'] ?? self::MAGIC_METHODS[$method-&gt;name], $method-&gt;class, $method-&gt;name, $method-&gt;getFileName(), $parent, $method-&gt;getReturnType());

                if (isset(self::$returnTypes[$class][$method-&gt;name][0]) &amp;&amp; $canAddReturnType) {
                    $this-&gt;fixReturnStatements($method, self::$returnTypes[$class][$method-&gt;name][0]);
                }

                if ($method-&gt;isPrivate()) {
                    unset(self::$returnTypes[$class][$method-&gt;name]);
                }
            }

            $this-&gt;patchTypes['force'] = $forcePatchTypes;

            if ($method-&gt;isPrivate()) {
                continue;
            }

            $finalOrInternal = false;

            foreach (['final', 'internal'] as $annotation) {
                if (null !== $description = $doc[$annotation][0] ?? null) {
                    self::${$annotation.'Methods'}[$class][$method-&gt;name] = [$class, '' !== $description ? ' '.$description.(preg_match('/[[:punct:]]$/', $description) ? '' : '.') : '.'];
                    $finalOrInternal = true;
                }
            }

            if ($finalOrInternal || $method-&gt;isConstructor() || !isset($doc['param']) || StatelessInvocation::class === $class) {
                continue;
            }
            if (!isset(self::$annotatedParameters[$class][$method-&gt;name])) {
                $definedParameters = [];
                foreach ($method-&gt;getParameters() as $parameter) {
                    $definedParameters[$parameter-&gt;name] = true;
                }
            }
            foreach ($doc['param'] as $parameterName =&gt; $parameterType) {
                if (!isset($definedParameters[$parameterName])) {
                    self::$annotatedParameters[$class][$method-&gt;name][$parameterName] = sprintf('The &quot;%%s::%s()&quot; method will require a new &quot;%s$%s&quot; argument in the next major version of its %s &quot;%s&quot;, not defining it is deprecated.', $method-&gt;name, $parameterType ? $parameterType.' ' : '', $parameterName, interface_exists($className) ? 'interface' : 'parent class', $className);
                }
            }
        }

        return $deprecations;
    }

    public function checkCase(\ReflectionClass $refl, string $file, string $class): ?array
    {
        $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]) &amp;&amp; $tail[$i] === $real[$j]) {
            --$i;
            --$j;
        }

        array_splice($tail, 0, $i + 1);

        if (!$tail) {
            return null;
        }

        $tail = \DIRECTORY_SEPARATOR.implode(\DIRECTORY_SEPARATOR, $tail);
        $tailLen = \strlen($tail);
        $real = $refl-&gt;getFileName();

        if (2 === self::$caseCheck) {
            $real = $this-&gt;darwinRealpath($real);
        }

        if (0 === substr_compare($real, $tail, -$tailLen, $tailLen, true)
            &amp;&amp; 0 !== substr_compare($real, $tail, -$tailLen, $tailLen, false)
        ) {
            return [substr($tail, -$tailLen + 1), substr($real, -$tailLen + 1), substr($real, 0, -$tailLen + 1)];
        }

        return null;
    }

    /**
     * `realpath` on MacOSX doesn't normalize the case of characters.
     */
    private function darwinRealpath(string $real): string
    {
        $i = 1 + strrpos($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();

                if (!@chdir($real)) {
                    return $real.$file;
                }

                $real = getcwd().'/';
                chdir($dir);

                $dir = $real;
                $k = $kDir;
                $i = \strlen($dir) - 1;
                while (!isset(self::$darwinCache[$k])) {
                    self::$darwinCache[$k] = [$dir, []];
                    self::$darwinCache[$dir] = &amp;self::$darwinCache[$k];

                    while ('/' !== $dir[--$i]) {
                    }
                    $k = substr($k, 0, ++$i);
                    $dir = substr($dir, 0, $i--);
                }
            }
        }

        $dirFiles = self::$darwinCache[$kDir][1];

        if (!isset($dirFiles[$file]) &amp;&amp; ') : eval()\'d code' === substr($file, -17)) {
            // Get the file name from &quot;file_name.php(123) : eval()'d code&quot;
            $file = substr($file, 0, strrpos($file, '(', -17));
        }

        if (isset($dirFiles[$file])) {
            return $real.$dirFiles[$file];
        }

        $kFile = strtolower($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;
        }

        return $real.$dirFiles[$kFile];
    }

    /**
     * `class_implements` includes interfaces from the parents so we have to manually exclude them.
     *
     * @return string[]
     */
    private function getOwnInterfaces(string $class, ?string $parent): array
    {
        $ownInterfaces = class_implements($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;
    }

    private function setReturnType(string $types, string $class, string $method, string $filename, ?string $parent, ?\ReflectionType $returnType = null): void
    {
        if ('__construct' === $method) {
            return;
        }

        if ('null' === $types) {
            self::$returnTypes[$class][$method] = ['null', 'null', $class, $filename];

            return;
        }

        if ($nullable = 0 === strpos($types, 'null|')) {
            $types = substr($types, 5);
        } elseif ($nullable = '|null' === substr($types, -5)) {
            $types = substr($types, 0, -5);
        }
        $arrayType = ['array' =&gt; 'array'];
        $typesMap = [];
        $glue = false !== strpos($types, '&amp;') ? '&amp;' : '|';
        foreach (explode($glue, $types) as $t) {
            $t = self::SPECIAL_RETURN_TYPES[strtolower($t)] ?? $t;
            $typesMap[$this-&gt;normalizeType($t, $class, $parent, $returnType)][$t] = $t;
        }

        if (isset($typesMap['array'])) {
            if (isset($typesMap['Traversable']) || isset($typesMap['\Traversable'])) {
                $typesMap['iterable'] = $arrayType !== $typesMap['array'] ? $typesMap['array'] : ['iterable'];
                unset($typesMap['array'], $typesMap['Traversable'], $typesMap['\Traversable']);
            } elseif ($arrayType !== $typesMap['array'] &amp;&amp; isset(self::$returnTypes[$class][$method]) &amp;&amp; !$returnType) {
                return;
            }
        }

        if (isset($typesMap['array']) &amp;&amp; isset($typesMap['iterable'])) {
            if ($arrayType !== $typesMap['array']) {
                $typesMap['iterable'] = $typesMap['array'];
            }
            unset($typesMap['array']);
        }

        $iterable = $object = true;
        foreach ($typesMap as $n =&gt; $t) {
            if ('null' !== $n) {
                $iterable = $iterable &amp;&amp; (\in_array($n, ['array', 'iterable']) || false !== strpos($n, 'Iterator'));
                $object = $object &amp;&amp; (\in_array($n, ['callable', 'object', '$this', 'static']) || !isset(self::SPECIAL_RETURN_TYPES[$n]));
            }
        }

        $phpTypes = [];
        $docTypes = [];

        foreach ($typesMap as $n =&gt; $t) {
            if ('null' === $n) {
                $nullable = true;
                continue;
            }

            $docTypes[] = $t;

            if ('mixed' === $n || 'void' === $n) {
                $nullable = false;
                $phpTypes = ['' =&gt; $n];
                continue;
            }

            if ('resource' === $n) {
                // there is no native type for &quot;resource&quot;
                return;
            }

            if (!isset($phpTypes[''])) {
                $phpTypes[] = $n;
            }
        }
        $docTypes = array_merge([], ...$docTypes);

        if (!$phpTypes) {
            return;
        }

        if (1 &lt; \count($phpTypes)) {
            if ($iterable &amp;&amp; '8.0' &gt; $this-&gt;patchTypes['php']) {
                $phpTypes = $docTypes = ['iterable'];
            } elseif ($object &amp;&amp; 'object' === $this-&gt;patchTypes['force']) {
                $phpTypes = $docTypes = ['object'];
            } elseif ('8.0' &gt; $this-&gt;patchTypes['php']) {
                // ignore multi-types return declarations
                return;
            }
        }

        $phpType = sprintf($nullable ? (1 &lt; \count($phpTypes) ? '%s|null' : '?%s') : '%s', implode($glue, $phpTypes));
        $docType = sprintf($nullable ? '%s|null' : '%s', implode($glue, $docTypes));

        self::$returnTypes[$class][$method] = [$phpType, $docType, $class, $filename];
    }

    private function normalizeType(string $type, string $class, ?string $parent, ?\ReflectionType $returnType): string
    {
        if (isset(self::SPECIAL_RETURN_TYPES[$lcType = strtolower($type)])) {
            if ('parent' === $lcType = self::SPECIAL_RETURN_TYPES[$lcType]) {
                $lcType = null !== $parent ? '\\'.$parent : 'parent';
            } elseif ('self' === $lcType) {
                $lcType = '\\'.$class;
            }

            return $lcType;
        }

        // We could resolve &quot;use&quot; statements to return the FQDN
        // but this would be too expensive for a runtime checker

        if ('[]' !== substr($type, -2)) {
            return $type;
        }

        if ($returnType instanceof \ReflectionNamedType) {
            $type = $returnType-&gt;getName();

            if ('mixed' !== $type) {
                return isset(self::SPECIAL_RETURN_TYPES[$type]) ? $type : '\\'.$type;
            }
        }

        return 'array';
    }

    /**
     * Utility method to add #[ReturnTypeWillChange] where php triggers deprecations.
     */
    private function patchReturnTypeWillChange(\ReflectionMethod $method)
    {
        if (\PHP_VERSION_ID &gt;= 80000 &amp;&amp; \count($method-&gt;getAttributes(\ReturnTypeWillChange::class))) {
            return;
        }

        if (!is_file($file = $method-&gt;getFileName())) {
            return;
        }

        $fileOffset = self::$fileOffsets[$file] ?? 0;

        $code = file($file);

        $startLine = $method-&gt;getStartLine() + $fileOffset - 2;

        if (false !== stripos($code[$startLine], 'ReturnTypeWillChange')) {
            return;
        }

        $code[$startLine] .= &quot;    #[\\ReturnTypeWillChange]\n&quot;;
        self::$fileOffsets[$file] = 1 + $fileOffset;
        file_put_contents($file, $code);
    }

    /**
     * Utility method to add @return annotations to the Symfony code-base where it triggers self-deprecations.
     */
    private function patchMethod(\ReflectionMethod $method, string $returnType, string $declaringFile, string $normalizedType)
    {
        static $patchedMethods = [];
        static $useStatements = [];

        if (!is_file($file = $method-&gt;getFileName()) || isset($patchedMethods[$file][$startLine = $method-&gt;getStartLine()])) {
            return;
        }

        $patchedMethods[$file][$startLine] = true;
        $fileOffset = self::$fileOffsets[$file] ?? 0;
        $startLine += $fileOffset - 2;
        if ($nullable = '|null' === substr($returnType, -5)) {
            $returnType = substr($returnType, 0, -5);
        }
        $glue = false !== strpos($returnType, '&amp;') ? '&amp;' : '|';
        $returnType = explode($glue, $returnType);
        $code = file($file);

        foreach ($returnType as $i =&gt; $type) {
            if (preg_match('/((?:\[\])+)$/', $type, $m)) {
                $type = substr($type, 0, -\strlen($m[1]));
                $format = '%s'.$m[1];
            } else {
                $format = null;
            }

            if (isset(self::SPECIAL_RETURN_TYPES[$type]) || ('\\' === $type[0] &amp;&amp; !$p = strrpos($type, '\\', 1))) {
                continue;
            }

            [$namespace, $useOffset, $useMap] = $useStatements[$file] ?? $useStatements[$file] = self::getUseStatements($file);

            if ('\\' !== $type[0]) {
                [$declaringNamespace, , $declaringUseMap] = $useStatements[$declaringFile] ?? $useStatements[$declaringFile] = self::getUseStatements($declaringFile);

                $p = strpos($type, '\\', 1);
                $alias = $p ? substr($type, 0, $p) : $type;

                if (isset($declaringUseMap[$alias])) {
                    $type = '\\'.$declaringUseMap[$alias].($p ? substr($type, $p) : '');
                } else {
                    $type = '\\'.$declaringNamespace.$type;
                }

                $p = strrpos($type, '\\', 1);
            }

            $alias = substr($type, 1 + $p);
            $type = substr($type, 1);

            if (!isset($useMap[$alias]) &amp;&amp; (class_exists($c = $namespace.$alias) || interface_exists($c) || trait_exists($c))) {
                $useMap[$alias] = $c;
            }

            if (!isset($useMap[$alias])) {
                $useStatements[$file][2][$alias] = $type;
                $code[$useOffset] = &quot;use $type;\n&quot;.$code[$useOffset];
                ++$fileOffset;
            } elseif ($useMap[$alias] !== $type) {
                $alias .= 'FIXME';
                $useStatements[$file][2][$alias] = $type;
                $code[$useOffset] = &quot;use $type as $alias;\n&quot;.$code[$useOffset];
                ++$fileOffset;
            }

            $returnType[$i] = null !== $format ? sprintf($format, $alias) : $alias;
        }

        if ('docblock' === $this-&gt;patchTypes['force'] || ('object' === $normalizedType &amp;&amp; '7.1' === $this-&gt;patchTypes['php'])) {
            $returnType = implode($glue, $returnType).($nullable ? '|null' : '');

            if (false !== strpos($code[$startLine], '#[')) {
                --$startLine;
            }

            if ($method-&gt;getDocComment()) {
                $code[$startLine] = &quot;     * @return $returnType\n&quot;.$code[$startLine];
            } else {
                $code[$startLine] .= &lt;&lt;&lt;EOTXT
    /**
     * @return $returnType
     */

EOTXT;
            }

            $fileOffset += substr_count($code[$startLine], &quot;\n&quot;) - 1;
        }

        self::$fileOffsets[$file] = $fileOffset;
        file_put_contents($file, $code);

        $this-&gt;fixReturnStatements($method, $normalizedType);
    }

    private static function getUseStatements(string $file): array
    {
        $namespace = '';
        $useMap = [];
        $useOffset = 0;

        if (!is_file($file)) {
            return [$namespace, $useOffset, $useMap];
        }

        $file = file($file);

        for ($i = 0; $i &lt; \count($file); ++$i) {
            if (preg_match('/^(class|interface|trait|abstract) /', $file[$i])) {
                break;
            }

            if (0 === strpos($file[$i], 'namespace ')) {
                $namespace = substr($file[$i], \strlen('namespace '), -2).'\\';
                $useOffset = $i + 2;
            }

            if (0 === strpos($file[$i], 'use ')) {
                $useOffset = $i;

                for (; 0 === strpos($file[$i], 'use '); ++$i) {
                    $u = explode(' as ', substr($file[$i], 4, -2), 2);

                    if (1 === \count($u)) {
                        $p = strrpos($u[0], '\\');
                        $useMap[substr($u[0], false !== $p ? 1 + $p : 0)] = $u[0];
                    } else {
                        $useMap[$u[1]] = $u[0];
                    }
                }

                break;
            }
        }

        return [$namespace, $useOffset, $useMap];
    }

    private function fixReturnStatements(\ReflectionMethod $method, string $returnType)
    {
        if ('docblock' !== $this-&gt;patchTypes['force']) {
            if ('7.1' === $this-&gt;patchTypes['php'] &amp;&amp; 'object' === ltrim($returnType, '?')) {
                return;
            }

            if ('7.4' &gt; $this-&gt;patchTypes['php'] &amp;&amp; $method-&gt;hasReturnType()) {
                return;
            }

            if ('8.0' &gt; $this-&gt;patchTypes['php'] &amp;&amp; (false !== strpos($returnType, '|') || \in_array($returnType, ['mixed', 'static'], true))) {
                return;
            }

            if ('8.1' &gt; $this-&gt;patchTypes['php'] &amp;&amp; false !== strpos($returnType, '&amp;')) {
                return;
            }
        }

        if (!is_file($file = $method-&gt;getFileName())) {
            return;
        }

        $fixedCode = $code = file($file);
        $i = (self::$fileOffsets[$file] ?? 0) + $method-&gt;getStartLine();

        if ('?' !== $returnType &amp;&amp; 'docblock' !== $this-&gt;patchTypes['force']) {
            $fixedCode[$i - 1] = preg_replace('/\)(?::[^;\n]++)?(;?\n)/', &quot;): $returnType\\1&quot;, $code[$i - 1]);
        }

        $end = $method-&gt;isGenerator() ? $i : $method-&gt;getEndLine();
        $inClosure = false;
        $braces = 0;
        for (; $i &lt; $end; ++$i) {
            if (!$inClosure) {
                $inClosure = false !== strpos($code[$i], 'function (');
            }

            if ($inClosure) {
                $braces += substr_count($code[$i], '{') - substr_count($code[$i], '}');
                $inClosure = $braces &gt; 0;

                continue;
            }

            if ('void' === $returnType) {
                $fixedCode[$i] = str_replace('    return null;', '    return;', $code[$i]);
            } elseif ('mixed' === $returnType || '?' === $returnType[0]) {
                $fixedCode[$i] = str_replace('    return;', '    return null;', $code[$i]);
            } else {
                $fixedCode[$i] = str_replace('    return;', &quot;    return $returnType!?;&quot;, $code[$i]);
            }
        }

        if ($fixedCode !== $code) {
            file_put_contents($file, $fixedCode);
        }
    }

    /**
     * @param \ReflectionClass|\ReflectionMethod|\ReflectionProperty $reflector
     */
    private function parsePhpDoc(\Reflector $reflector): array
    {
        if (!$doc = $reflector-&gt;getDocComment()) {
            return [];
        }

        $tagName = '';
        $tagContent = '';

        $tags = [];

        foreach (explode(&quot;\n&quot;, substr($doc, 3, -2)) as $line) {
            $line = ltrim($line);
            $line = ltrim($line, '*');

            if ('' === $line = trim($line)) {
                if ('' !== $tagName) {
                    $tags[$tagName][] = $tagContent;
                }
                $tagName = $tagContent = '';
                continue;
            }

            if ('@' === $line[0]) {
                if ('' !== $tagName) {
                    $tags[$tagName][] = $tagContent;
                    $tagContent = '';
                }

                if (preg_match('{^@([-a-zA-Z0-9_:]++)(\s|$)}', $line, $m)) {
                    $tagName = $m[1];
                    $tagContent = str_replace(&quot;\t&quot;, ' ', ltrim(substr($line, 2 + \strlen($tagName))));
                } else {
                    $tagName = '';
                }
            } elseif ('' !== $tagName) {
                $tagContent .= ' '.str_replace(&quot;\t&quot;, ' ', $line);
            }
        }

        if ('' !== $tagName) {
            $tags[$tagName][] = $tagContent;
        }

        foreach ($tags['method'] ?? [] as $i =&gt; $method) {
            unset($tags['method'][$i]);

            $parts = preg_split('{(\s++|\((?:[^()]*+|(?R))*\)(?: *: *[^ ]++)?|&lt;(?:[^&lt;&gt;]*+|(?R))*&gt;|\{(?:[^{}]*+|(?R))*\})}', $method, -1, \PREG_SPLIT_DELIM_CAPTURE);
            $returnType = '';
            $static = 'static' === $parts[0];

            for ($i = $static ? 2 : 0; null !== $p = $parts[$i] ?? null; $i += 2) {
                if (\in_array($p, ['', '|', '&amp;', 'callable'], true) || \in_array(substr($returnType, -1), ['|', '&amp;'], true)) {
                    $returnType .= trim($parts[$i - 1] ?? '').$p;
                    continue;
                }

                $signature = '(' === ($parts[$i + 1][0] ?? '(') ? $parts[$i + 1] ?? '()' : null;

                if (null === $signature &amp;&amp; '' === $returnType) {
                    $returnType = $p;
                    continue;
                }

                if ($static &amp;&amp; 2 === $i) {
                    $static = false;
                    $returnType = 'static';
                }

                if (\in_array($description = trim(implode('', \array_slice($parts, 2 + $i))), ['', '.'], true)) {
                    $description = null;
                } elseif (!preg_match('/[.!]$/', $description)) {
                    $description .= '.';
                }

                $tags['method'][$p] = [$static, $returnType, $signature ?? '()', $description];
                break;
            }
        }

        foreach ($tags['param'] ?? [] as $i =&gt; $param) {
            unset($tags['param'][$i]);

            if (\strlen($param) !== strcspn($param, '&lt;{(')) {
                $param = preg_replace('{\(([^()]*+|(?R))*\)(?: *: *[^ ]++)?|&lt;([^&lt;&gt;]*+|(?R))*&gt;|\{([^{}]*+|(?R))*\}}', '', $param);
            }

            if (false === $i = strpos($param, '$')) {
                continue;
            }

            $type = 0 === $i ? '' : rtrim(substr($param, 0, $i), ' &amp;');
            $param = substr($param, 1 + $i, (strpos($param, ' ', $i) ?: (1 + $i + \strlen($param))) - $i - 1);

            $tags['param'][$param] = $type;
        }

        foreach (['var', 'return'] as $k) {
            if (null === $v = $tags[$k][0] ?? null) {
                continue;
            }
            if (\strlen($v) !== strcspn($v, '&lt;{(')) {
                $v = preg_replace('{\(([^()]*+|(?R))*\)(?: *: *[^ ]++)?|&lt;([^&lt;&gt;]*+|(?R))*&gt;|\{([^{}]*+|(?R))*\}}', '', $v);
            }

            $tags[$k] = substr($v, 0, strpos($v, ' ') ?: \strlen($v)) ?: null;
        }

        return $tags;
    }
}
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