ftp_size
    (PHP 3 >= 3.0.13, PHP 4, PHP 5)
ftp_size -- Returns the size of the given file
Description
int 
ftp_size ( resource ftp_stream, string remote_file )
   ftp_size() returns the size of the given file in
   bytes.
  
Note: 
    Not all servers support this feature.
   
Parameters
   
- ftp_stream
 
       The link identifier of the FTP connection.
      
- remote_file
 
       The remote file.
      
 
  Return Values
   Returns the file size on success, or -1 on error.
  
Examples
   
Example 1. ftp_size() example 
<?php
  $file = 'somefile.txt';
  // set up basic connection $conn_id = ftp_connect($ftp_server);
  // login with username and password $login_result = ftp_login($conn_id, $ftp_user_name, $ftp_user_pass);
  // get the size of $file $res = ftp_size($conn_id, $file);
  if ($res != -1) {     echo "size of $file is $res bytes"; } else {     echo "couldn't get the size"; }
  // close the connection ftp_close($conn_id);
  ?>
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