vendor/symfony/http-kernel/Controller/ControllerResolver.php line 131
<?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\HttpKernel\Controller;use Psr\Log\LoggerInterface;use Symfony\Component\HttpFoundation\Request;/*** This implementation uses the '_controller' request attribute to determine* the controller to execute.** @author Fabien Potencier <fabien@symfony.com>* @author Tobias Schultze <http://tobion.de>*/class ControllerResolver implements ControllerResolverInterface{private ?LoggerInterface $logger;public function __construct(LoggerInterface $logger = null){$this->logger = $logger;}public function getController(Request $request): callable|false{if (!$controller = $request->attributes->get('_controller')) {$this->logger?->warning('Unable to look for the controller as the "_controller" parameter is missing.');return false;}if (\is_array($controller)) {if (isset($controller[0]) && \is_string($controller[0]) && isset($controller[1])) {try {$controller[0] = $this->instantiateController($controller[0]);} catch (\Error|\LogicException $e) {if (\is_callable($controller)) {return $controller;}throw $e;}}if (!\is_callable($controller)) {throw new \InvalidArgumentException(sprintf('The controller for URI "%s" is not callable: ', $request->getPathInfo()).$this->getControllerError($controller));}return $controller;}if (\is_object($controller)) {if (!\is_callable($controller)) {throw new \InvalidArgumentException(sprintf('The controller for URI "%s" is not callable: ', $request->getPathInfo()).$this->getControllerError($controller));}return $controller;}if (\function_exists($controller)) {return $controller;}try {$callable = $this->createController($controller);} catch (\InvalidArgumentException $e) {throw new \InvalidArgumentException(sprintf('The controller for URI "%s" is not callable: ', $request->getPathInfo()).$e->getMessage(), 0, $e);}if (!\is_callable($callable)) {throw new \InvalidArgumentException(sprintf('The controller for URI "%s" is not callable: ', $request->getPathInfo()).$this->getControllerError($callable));}return $callable;}/*** Returns a callable for the given controller.** @throws \InvalidArgumentException When the controller cannot be created*/protected function createController(string $controller): callable{if (!str_contains($controller, '::')) {$controller = $this->instantiateController($controller);if (!\is_callable($controller)) {throw new \InvalidArgumentException($this->getControllerError($controller));}return $controller;}[$class, $method] = explode('::', $controller, 2);try {$controller = [$this->instantiateController($class), $method];} catch (\Error|\LogicException $e) {try {if ((new \ReflectionMethod($class, $method))->isStatic()) {return $class.'::'.$method;}} catch (\ReflectionException) {throw $e;}throw $e;}if (!\is_callable($controller)) {throw new \InvalidArgumentException($this->getControllerError($controller));}return $controller;}/*** Returns an instantiated controller.*/protected function instantiateController(string $class): object{return new $class();}private function getControllerError(mixed $callable): string{if (\is_string($callable)) {if (str_contains($callable, '::')) {$callable = explode('::', $callable, 2);} else {return sprintf('Function "%s" does not exist.', $callable);}}if (\is_object($callable)) {$availableMethods = $this->getClassMethodsWithoutMagicMethods($callable);$alternativeMsg = $availableMethods ? sprintf(' or use one of the available methods: "%s"', implode('", "', $availableMethods)) : '';return sprintf('Controller class "%s" cannot be called without a method name. You need to implement "__invoke"%s.', get_debug_type($callable), $alternativeMsg);}if (!\is_array($callable)) {return sprintf('Invalid type for controller given, expected string, array or object, got "%s".', get_debug_type($callable));}if (!isset($callable[0]) || !isset($callable[1]) || 2 !== \count($callable)) {return 'Invalid array callable, expected [controller, method].';}[$controller, $method] = $callable;if (\is_string($controller) && !class_exists($controller)) {return sprintf('Class "%s" does not exist.', $controller);}$className = \is_object($controller) ? get_debug_type($controller) : $controller;if (method_exists($controller, $method)) {return sprintf('Method "%s" on class "%s" should be public and non-abstract.', $method, $className);}$collection = $this->getClassMethodsWithoutMagicMethods($controller);$alternatives = [];foreach ($collection as $item) {$lev = levenshtein($method, $item);if ($lev <= \strlen($method) / 3 || str_contains($item, $method)) {$alternatives[] = $item;}}asort($alternatives);$message = sprintf('Expected method "%s" on class "%s"', $method, $className);if (\count($alternatives) > 0) {$message .= sprintf(', did you mean "%s"?', implode('", "', $alternatives));} else {$message .= sprintf('. Available methods: "%s".', implode('", "', $collection));}return $message;}private function getClassMethodsWithoutMagicMethods($classOrObject): array{$methods = get_class_methods($classOrObject);return array_filter($methods, function (string $method) {return 0 !== strncmp($method, '__', 2);});}}