OptimizedDirectorySourceLocator - fixed crash when parsing Text.php of nl_BE from Faker

Author: ondrejmirtes

src/Reflection/BetterReflection/SourceLocator/OptimizedDirectorySourceLocator.php

@@ -203,6 +203,9 @@ private function findSymbols(string $file): array
 
 		// strip heredocs/nowdocs
 		$contents = preg_replace('{<<<[ \t]*([\'"]?)(\w+)\\1(?:\r\n|\n|\r)(?:.*?)(?:\r\n|\n|\r)(?:\s*)\\2(?=\s+|[;,.)])}s', 'null', $contents);
+		if ($contents === null) {
+			return ['classes' => [], 'functions' => []];
+		}
 		// strip strings
 		$contents = preg_replace('{"[^"\\\\]*+(\\\\.[^"\\\\]*+)*+"|\'[^\'\\\\]*+(\\\\.[^\'\\\\]*+)*+\'}s', 'null', $contents);
 		// strip leading non-php code if needed

tests/PHPStan/Reflection/BetterReflection/SourceLocator/OptimizedDirectorySourceLocatorTest.php

@@ -135,4 +135,15 @@ public function testFunctionDoesNotExist(string $functionName): void
 		$functionReflector->reflect($functionName);
 	}
 
+	public function testBug5525(): void
+	{
+		$factory = self::getContainer()->getByType(OptimizedDirectorySourceLocatorFactory::class);
+		$locator = $factory->createByFiles([__DIR__ . '/data/bug-5525.php']);
+		$classReflector = new ClassReflector($locator);
+		$functionReflector = new FunctionReflector($locator, $classReflector);
+
+		$this->expectException(IdentifierNotFound::class);
+		$functionReflector->reflect('spl_autoload_register');
+	}
+
 }