PHPStan Level 7 for ten more files (#5327)

* PHPStan Level 7 for nine more files

* Minor syntax

* One more

2 files changed, 9 insertions, 6 deletions

diff --git a/app/Services/ExportService.php b/app/Services/ExportService.php
index 10d5ca2cc..c19c505af 100644
--- a/app/Services/ExportService.php
+++ b/app/Services/ExportService.php
@@ -43,7 +43,7 @@ class FreshRSS_Export_Service {
 	public function generateOpml(): array {
 		$view = new FreshRSS_View();
 		$day = date('Y-m-d');
-		$view->categories = $this->category_dao->listCategories(true, true);
+		$view->categories = $this->category_dao->listCategories(true, true) ?: [];
 		$view->excludeMutedFeeds = false;
 
 		return [
@@ -67,7 +67,7 @@ class FreshRSS_Export_Service {
 	 */
 	public function generateStarredEntries(string $type): array {
 		$view = new FreshRSS_View();
-		$view->categories = $this->category_dao->listCategories(true);
+		$view->categories = $this->category_dao->listCategories(true) ?: [];
 		$day = date('Y-m-d');
 
 		$view->list_title = _t('sub.import_export.starred_list');
@@ -99,7 +99,7 @@ class FreshRSS_Export_Service {
 		}
 
 		$view = new FreshRSS_View();
-		$view->categories = $this->category_dao->listCategories(true);
+		$view->categories = $this->category_dao->listCategories(true) ?: [];
 		$view->feed = $feed;
 		$day = date('Y-m-d');
 		$filename = "feed_{$day}_" . $feed->categoryId() . '_' . $feed->id() . '.json';
@@ -127,7 +127,7 @@ class FreshRSS_Export_Service {
 	 * @return array<string,string> Keys are filenames and values are contents.
 	 */
 	public function generateAllFeedEntries(int $max_number_entries): array {
-		$feed_ids = $this->feed_dao->listFeedsIds();
+		$feed_ids = $this->feed_dao->listFeedsIds() ?: [];
 
 		$exported_files = [];
 		foreach ($feed_ids as $feed_id) {
@@ -154,6 +154,9 @@ class FreshRSS_Export_Service {
 
 		// From https://stackoverflow.com/questions/1061710/php-zip-files-on-the-fly
 		$zip_file = tempnam('/tmp', 'zip');
+		if ($zip_file == false) {
+			return [$zip_filename, false];
+		}
 		$zip_archive = new ZipArchive();
 		$zip_archive->open($zip_file, ZipArchive::OVERWRITE);
 
diff --git a/app/Services/ImportService.php b/app/Services/ImportService.php
index 3707e4c5e..e5d558233 100644
--- a/app/Services/ImportService.php
+++ b/app/Services/ImportService.php
@@ -56,7 +56,7 @@ class FreshRSS_Import_Service {
 
 		// Get the categories by names so we can use this array to retrieve
 		// existing categories later.
-		$categories = $this->catDAO->listCategories(false);
+		$categories = $this->catDAO->listCategories(false) ?: [];
 		$categories_by_names = [];
 		foreach ($categories as $category) {
 			$categories_by_names[$category->name()] = $category;
@@ -180,7 +180,7 @@ class FreshRSS_Import_Service {
 			if (isset($feed_elt['frss:filtersActionRead'])) {
 				$feed->_filtersAction(
 					'read',
-					preg_split('/[\n\r]+/', $feed_elt['frss:filtersActionRead'])
+					preg_split('/[\n\r]+/', $feed_elt['frss:filtersActionRead']) ?: []
 				);
 			}