filegroup() public method

Gets file group
public filegroup ( string $path ) : mixed
$path string
return mixed
 /**
  * @param string $identifier
  * @return array
  */
 public function getPermissions($identifier)
 {
     $permissions = ['r' => false, 'w' => false];
     $filePerms = array_map(function ($var) {
         return (int) $var;
     }, str_split(substr(decoct($this->sftp->fileperms($identifier)), -3, 3)));
     if ($this->info['userId'] === $this->sftp->fileowner($identifier)) {
         $permissions['r'] = ($filePerms[0] & self::READABLE) === self::READABLE;
         $permissions['w'] = ($filePerms[0] & self::WRITABLE) === self::WRITABLE;
     }
     if (in_array($this->sftp->filegroup($identifier), $this->info['groupIds'])) {
         $permissions['r'] = $permissions['r'] ?: ($filePerms[1] & self::READABLE) === self::READABLE;
         $permissions['w'] = $permissions['w'] ?: ($filePerms[1] & self::WRITABLE) === self::WRITABLE;
     }
     $permissions['r'] = $permissions['r'] ?: ($filePerms[2] & self::READABLE) === self::READABLE;
     $permissions['w'] = $permissions['w'] ?: ($filePerms[2] & self::WRITABLE) === self::WRITABLE;
     return $permissions;
 }