PHPStan: bump level to 7

composer.json

@@ -59,7 +59,7 @@
 		],
 		"phplint": "parallel-lint -j 10 --exclude vendor .",
 		"phpcs": "phpcs --standard=ruleset.xml --extensions=php --encoding=utf-8 --tab-width=4 -sp bin src tests",
-		"phpstan": "@php vendor/phpstan/phpstan-shim/phpstan.phar analyse bin src tests --level 5 --no-progress",
+		"phpstan": "@php vendor/phpstan/phpstan-shim/phpstan.phar analyse bin src tests --level 7 --no-progress",
 		"test": "phpunit"
 	},
 	"config": {

src/CheckCommand.php

@@ -27,7 +27,11 @@ protected function execute(InputInterface $input, OutputInterface $output): ?int
 		}
 		$output->writeln(sprintf('Using config file "%s"', $configFilePath));
 
-		$config = Yaml::parse(file_get_contents($configFilePath));
+		$configFileContents = file_get_contents($configFilePath);
+		if ($configFileContents === false) {
+			throw new \Exception(sprintf('File "%s" could not be loaded', $configFilePath));
+		}
+		$config = Yaml::parse($configFileContents);
 
 		if (!array_key_exists('files', $config)) {
 			$output->writeln('There must be a key "files" in config');

src/SortChecker.php

@@ -24,7 +24,11 @@ public function isSorted(
 	): SortCheckResult
 	{
 		try {
-			$data = Yaml::parse(file_get_contents($filename), Yaml::PARSE_CUSTOM_TAGS);
+			$yamlContent = file_get_contents($filename);
+			if ($yamlContent === false) {
+				throw new \Exception(sprintf('File "%s" could not be loaded', $filename));
+			}
+			$data = Yaml::parse($yamlContent, Yaml::PARSE_CUSTOM_TAGS);
 
 			$errors = $this->areDataSorted($data, $excludedKeys, $excludedSections, null, $depth);
 
@@ -39,8 +43,8 @@ public function isSorted(
 
 	/**
 	 * @param mixed[] $yamlData
-	 * @param string[]|string[][] $excludedKeys
-	 * @param string[]|string[][] $excludedSections
+	 * @param mixed[]|string[]|string[][] $excludedKeys
+	 * @param mixed[]|string[]|string[][] $excludedSections
 	 * @param string|null $parent
 	 * @param int $depth
 	 * @return string[] array of error messages