ftp_put(), problem with relative path

[Andrzej]

Hello

I would like to upload a file:
script php with ftp_put() is on the: /public_html/mleko/ftp.php
source file is on the /public_html/mleko/temp.txt
remote file should be uploaded to /public_ftp/mleko/uploadedfile.txt

could you please tell me what is wrong with code as below:

$result = ftp_put( '/public_ftp/mleko/uploadedfile.txt', 'temp.txt', FTP_ASCII ); 

I receive an error:
"... no such file or directory ... "

thanks in advance
andrzej