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<?php |
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/* |
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* This file is part of the Symfony package. |
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* |
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* (c) Fabien Potencier <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace App\Twig; |
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use Twig\Environment; |
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use Twig\Extension\AbstractExtension; |
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use Twig\Template; |
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use Twig\TwigFunction; |
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/** |
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* CAUTION: this is an extremely advanced Twig extension. It's used to get the |
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* source code of the controller and the template used to render the current |
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* page. If you are starting with Symfony, don't look at this code and consider |
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* studying instead the code of the src/App/Twig/AppExtension.php extension. |
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* |
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* @author Ryan Weaver <[email protected]> |
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* @author Javier Eguiluz <[email protected]> |
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*/ |
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class SourceCodeExtension extends AbstractExtension |
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{ |
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private $controller; |
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public function setController(?callable $controller) |
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{ |
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$this->controller = $controller; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getFunctions(): array |
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{ |
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return [ |
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new TwigFunction('show_source_code', [$this, 'showSourceCode'], ['is_safe' => ['html'], 'needs_environment' => true]), |
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]; |
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} |
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public function showSourceCode(Environment $twig, $template): string |
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{ |
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return $twig->render('debug/source_code.html.twig', [ |
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'controller' => $this->getController(), |
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'template' => $this->getTemplateSource($twig->resolveTemplate($template)), |
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]); |
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} |
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private function getController(): ?array |
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{ |
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// this happens for example for exceptions (404 errors, etc.) |
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if (null === $this->controller) { |
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return null; |
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} |
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$method = $this->getCallableReflector($this->controller); |
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$classCode = file($method->getFileName()); |
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$methodCode = array_slice($classCode, $method->getStartLine() - 1, $method->getEndLine() - $method->getStartLine() + 1); |
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$controllerCode = ' '.$method->getDocComment()."\n".implode('', $methodCode); |
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return [ |
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'file_path' => $method->getFileName(), |
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'starting_line' => $method->getStartLine(), |
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'source_code' => $this->unindentCode($controllerCode), |
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]; |
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} |
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/** |
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* Gets a reflector for a callable. |
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* |
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* This logic is copied from Symfony\Component\HttpKernel\Controller\ControllerResolver::getArguments |
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*/ |
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private function getCallableReflector(callable $callable): \ReflectionFunctionAbstract |
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{ |
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if (is_array($callable)) { |
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return new \ReflectionMethod($callable[0], $callable[1]); |
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} |
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if (is_object($callable) && !$callable instanceof \Closure) { |
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$r = new \ReflectionObject($callable); |
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return $r->getMethod('__invoke'); |
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} |
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return new \ReflectionFunction($callable); |
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} |
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private function getTemplateSource(Template $template): array |
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{ |
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$templateSource = $template->getSourceContext(); |
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return [ |
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// Twig templates are not always stored in files (they can be stored |
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// in a database for example). However, for the needs of the Symfony |
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// Demo app, we consider that all templates are stored in files and |
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// that their file paths can be obtained through the source context. |
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'file_path' => $templateSource->getPath(), |
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'starting_line' => 1, |
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'source_code' => $templateSource->getCode(), |
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]; |
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} |
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/** |
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* Utility method that "unindents" the given $code when all its lines start |
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* with a tabulation of four white spaces. |
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*/ |
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private function unindentCode(string $code): string |
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{ |
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$formattedCode = $code; |
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$codeLines = explode("\n", $code); |
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$indentedLines = array_filter($codeLines, function ($lineOfCode) { |
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return '' === $lineOfCode || ' ' === mb_substr($lineOfCode, 0, 4); |
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}); |
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if (count($indentedLines) === count($codeLines)) { |
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$formattedCode = array_map(function ($lineOfCode) { |
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return mb_substr($lineOfCode, 4); |
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}, $codeLines); |
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$formattedCode = implode("\n", $formattedCode); |
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} |
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return $formattedCode; |
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} |
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} |
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hgraca /
explicit-architecture-php
It seems like the type of the argument is not accepted by the function/method which you are calling.
In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug.
We suggest to add an explicit type cast like in the following example: