(PECL ssh2 >= 0.9.0)
ssh2_sftp_mkdir — Create a directory
$sftp
   , string $dirname
   [, int $mode = 0777
   [, bool $recursive = false
  ]] )
   Creates a directory on the remote file server with permissions set to
   mode.  
  
This function is similar to using mkdir() with the ssh2.sftp:// wrapper.
sftpAn SSH2 SFTP resource opened by ssh2_sftp().
dirnamePath of the new directory.
modePermissions on the new directory.
recursive
       If recursive is TRUE any parent directories
       required for dirname will be automatically created as well.
      
   Returns TRUE on success or FALSE on failure.
  
Example #1 Creating a directory on a remote server
<?php
$connection = ssh2_connect('shell.example.com', 22);
ssh2_auth_password($connection, 'username', 'password');
$sftp = ssh2_sftp($connection);
ssh2_sftp_mkdir($sftp, '/home/username/newdir');
/* Or:  mkdir("ssh2.sftp://$sftp/home/username/newdir"); */
?>