184 lines
6.7 KiB
PHP
184 lines
6.7 KiB
PHP
<?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 <fabien@symfony.com>
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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 Symfony\Component\ErrorHandler\ErrorEnhancer;
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use Composer\Autoload\ClassLoader;
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use Symfony\Component\ErrorHandler\DebugClassLoader;
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use Symfony\Component\ErrorHandler\Error\ClassNotFoundError;
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use Symfony\Component\ErrorHandler\Error\FatalError;
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/**
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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class ClassNotFoundErrorEnhancer implements ErrorEnhancerInterface
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{
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public function enhance(\Throwable $error): ?\Throwable
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{
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// Some specific versions of PHP produce a fatal error when extending a not found class.
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$message = !$error instanceof FatalError ? $error->getMessage() : $error->getError()['message'];
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if (!preg_match('/^(Class|Interface|Trait) [\'"]([^\'"]+)[\'"] not found$/', $message, $matches)) {
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return null;
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}
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$typeName = strtolower($matches[1]);
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$fullyQualifiedClassName = $matches[2];
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if (false !== $namespaceSeparatorIndex = strrpos($fullyQualifiedClassName, '\\')) {
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$className = substr($fullyQualifiedClassName, $namespaceSeparatorIndex + 1);
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$namespacePrefix = substr($fullyQualifiedClassName, 0, $namespaceSeparatorIndex);
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$message = sprintf('Attempted to load %s "%s" from namespace "%s".', $typeName, $className, $namespacePrefix);
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$tail = ' for another namespace?';
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} else {
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$className = $fullyQualifiedClassName;
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$message = sprintf('Attempted to load %s "%s" from the global namespace.', $typeName, $className);
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$tail = '?';
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}
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if ($candidates = $this->getClassCandidates($className)) {
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$tail = array_pop($candidates).'"?';
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if ($candidates) {
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$tail = ' for e.g. "'.implode('", "', $candidates).'" or "'.$tail;
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} else {
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$tail = ' for "'.$tail;
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}
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}
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$message .= "\nDid you forget a \"use\" statement".$tail;
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return new ClassNotFoundError($message, $error);
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}
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/**
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* Tries to guess the full namespace for a given class name.
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*
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* By default, it looks for PSR-0 and PSR-4 classes registered via a Symfony or a Composer
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* autoloader (that should cover all common cases).
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*
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* @param string $class A class name (without its namespace)
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*
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* Returns an array of possible fully qualified class names
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*/
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private function getClassCandidates(string $class): array
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{
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if (!\is_array($functions = spl_autoload_functions())) {
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return [];
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}
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// find Symfony and Composer autoloaders
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$classes = [];
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foreach ($functions as $function) {
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if (!\is_array($function)) {
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continue;
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}
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// get class loaders wrapped by DebugClassLoader
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if ($function[0] instanceof DebugClassLoader) {
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$function = $function[0]->getClassLoader();
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if (!\is_array($function)) {
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continue;
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}
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}
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if ($function[0] instanceof ClassLoader) {
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foreach ($function[0]->getPrefixes() as $prefix => $paths) {
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foreach ($paths as $path) {
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$classes[] = $this->findClassInPath($path, $class, $prefix);
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}
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}
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foreach ($function[0]->getPrefixesPsr4() as $prefix => $paths) {
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foreach ($paths as $path) {
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$classes[] = $this->findClassInPath($path, $class, $prefix);
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}
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}
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}
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}
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return array_unique(array_merge([], ...$classes));
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}
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private function findClassInPath(string $path, string $class, string $prefix): array
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{
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$path = realpath($path.'/'.strtr($prefix, '\\_', '//')) ?: realpath($path.'/'.\dirname(strtr($prefix, '\\_', '//'))) ?: realpath($path);
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if (!$path || !is_dir($path)) {
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return [];
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}
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$classes = [];
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$filename = $class.'.php';
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foreach (new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($path, \RecursiveDirectoryIterator::SKIP_DOTS), \RecursiveIteratorIterator::LEAVES_ONLY) as $file) {
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if ($filename == $file->getFileName() && $class = $this->convertFileToClass($path, $file->getPathName(), $prefix)) {
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$classes[] = $class;
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}
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}
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return $classes;
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}
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private function convertFileToClass(string $path, string $file, string $prefix): ?string
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{
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$candidates = [
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// namespaced class
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$namespacedClass = str_replace([$path.\DIRECTORY_SEPARATOR, '.php', '/'], ['', '', '\\'], $file),
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// namespaced class (with target dir)
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$prefix.$namespacedClass,
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// namespaced class (with target dir and separator)
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$prefix.'\\'.$namespacedClass,
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// PEAR class
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str_replace('\\', '_', $namespacedClass),
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// PEAR class (with target dir)
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str_replace('\\', '_', $prefix.$namespacedClass),
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// PEAR class (with target dir and separator)
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str_replace('\\', '_', $prefix.'\\'.$namespacedClass),
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];
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if ($prefix) {
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$candidates = array_filter($candidates, fn ($candidate) => str_starts_with($candidate, $prefix));
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}
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// We cannot use the autoloader here as most of them use require; but if the class
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// is not found, the new autoloader call will require the file again leading to a
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// "cannot redeclare class" error.
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foreach ($candidates as $candidate) {
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if ($this->classExists($candidate)) {
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return $candidate;
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}
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}
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// Symfony may ship some polyfills, like "Normalizer". But if the Intl
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// extension is already installed, the next require_once will fail with
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// a compile error because the class is already defined. And this one
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// does not throw a Throwable. So it's better to skip it here.
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if (str_contains($file, 'Resources/stubs')) {
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return null;
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}
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try {
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require_once $file;
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} catch (\Throwable) {
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return null;
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}
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foreach ($candidates as $candidate) {
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if ($this->classExists($candidate)) {
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return $candidate;
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}
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}
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return null;
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}
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private function classExists(string $class): bool
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{
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return class_exists($class, false) || interface_exists($class, false) || trait_exists($class, false);
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}
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}
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