up: upgrade support php8.4

Author: inhere

.github/workflows/php.yml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        php: [8.1, 8.2, 8.3] #
+        php: [8.1, 8.2, 8.3, 8.4] #
         os: [ubuntu-latest, macOS-latest] # windows-latest,
 #        include:
 #          - os: 'ubuntu-latest'

src/File.php

@@ -191,7 +191,7 @@ public static function getContents(
         bool $useIncludePath = false,
         $context = null,
         int $offset = 0,
-        int $maxlen = null
+        ?int $maxlen = null
     ): string {
         if (!is_file($filename)) {
             throw new InvalidArgumentException("No such file: $filename");

src/Traits/FileSystemFuncTrait.php

@@ -268,6 +268,10 @@ public static function realpath(string $path): string
         }
 
         $absolutes = [];
+        if ($path[0] === '/') {
+            $absolutes[] = '/';
+        }
+
         foreach ($parts as $part) {
             if ('.' === $part) {
                 continue;