- str_starts_with, str_contains used instead of strpos === 0, strpos !== 0, strpos === false, strpos !== false

- symfony/polyfill-php80 installed to introduce the polyfill and support php7.3 using php8 functions
- symfony/polyfill-ctype installed to introduce ctype functions in case somebody doesn't have the ctype extension installed

lib/Data/S3Storage.php

@@ -462,7 +462,7 @@ class S3Storage extends AbstractData
         try {
             foreach ($this->_listAllObjects($prefix) as $object) {
                 $candidate = substr($object['Key'], strlen($prefix));
-                if (strpos($candidate, '/') === false) {
+                if (!str_contains($candidate, '/')) {
                     $pastes[] = $candidate;
                 }
             }