[FrameworkBundle] fixes #54402: Suppress PHP warning when is_readable() tries to access dirs outside of open_basedir restrictions

Author: Jeldrik Geraedts

Command/CacheClearCommand.php

@@ -202,7 +202,7 @@ private function isNfs(string $dir): bool
 
         if (null === $mounts) {
             $mounts = [];
-            if ('/' === \DIRECTORY_SEPARATOR && is_readable('/proc/mounts') && $files = @file('/proc/mounts')) {
+            if ('/' === \DIRECTORY_SEPARATOR && @is_readable('/proc/mounts') && $files = @file('/proc/mounts')) {
                 foreach ($files as $mount) {
                     $mount = \array_slice(explode(' ', $mount), 1, -3);
                     if (!\in_array(array_pop($mount), ['vboxsf', 'nfs'])) {