diff --git a/api/v1/_submissions/BackendSubmissionsController.php b/api/v1/_submissions/BackendSubmissionsController.php
index 329676442f..4be14e358b 100644
--- a/api/v1/_submissions/BackendSubmissionsController.php
+++ b/api/v1/_submissions/BackendSubmissionsController.php
@@ -28,7 +28,7 @@ protected function getSubmissionCollector(array $queryParams): Collector
 
         if (isset($queryParams['sectionIds'])) {
             $collector->filterBySectionIds(
-                array_map('intval', paramToArray($queryParams['sectionIds']))
+                array_map(intval(...), paramToArray($queryParams['sectionIds']))
             );
         }
 
diff --git a/classes/search/PreprintSearchIndex.php b/classes/search/PreprintSearchIndex.php
index d7394ff968..9e25df4114 100644
--- a/classes/search/PreprintSearchIndex.php
+++ b/classes/search/PreprintSearchIndex.php
@@ -58,8 +58,8 @@ public function submissionMetadataChanged($submission)
                 array_values((array) $author->getData('givenName')),
                 array_values((array) $author->getData('familyName')),
                 array_values((array) $author->getData('preferredPublicName')),
-                array_values(array_map('strip_tags', (array) $author->getData('affiliation'))),
-                array_values(array_map('strip_tags', (array) $author->getData('biography')))
+                array_values(array_map(strip_tags(...), (array) $author->getData('affiliation'))),
+                array_values(array_map(strip_tags(...), (array) $author->getData('biography')))
             );
         }
 
diff --git a/plugins/metadata/dc11/filter/Dc11SchemaPreprintAdapter.php b/plugins/metadata/dc11/filter/Dc11SchemaPreprintAdapter.php
index 884e8c00d9..1b8425e50f 100644
--- a/plugins/metadata/dc11/filter/Dc11SchemaPreprintAdapter.php
+++ b/plugins/metadata/dc11/filter/Dc11SchemaPreprintAdapter.php
@@ -114,7 +114,7 @@ public function &extractMetadataFromDataObject(&$submission)
         // Contributor
         $contributors = (array) $publication->getData('sponsor');
         foreach ($contributors as $locale => $contributor) {
-            $contributors[$locale] = array_map('trim', explode(';', $contributor));
+            $contributors[$locale] = array_map(trim(...), explode(';', $contributor));
         }
         $this->_addLocalizedElements($dc11Description, 'dc:contributor', $contributors);