ftp_nb_fput not transferring more than 4096 bytes - php

Question

I am trying to upload a file to a server with ftp_nb_fput, just that it doesn't upload more than 4096 bytes from the files, and the file has about 700 kb.
$connection_to = ftp_connect($host_to);
$ftp_to = ftp_login($connection_to, $user_to, $pass_to);
$fp = fopen($directory_to_move_files.$file_to_move, 'r');
ftp_nb_fput($connection_to, $file_to_move, $fp, FTP_ASCII);
ftp_close($connection_to);
I am interested to use this function not file_put_contents or CURL.
There is no error that I get.

Answer 1

There are two things to take into considertion when working with ftp_nb_put function from ftp
it works asynchronously so it works using chunks it meaning that
ftp_nb_put($my_connection, "test.remote", "test.local", FTP_BINARY);
will only result in a small chunk of data uploaded and the flag FTP_MOREDATA returned from the ftp_nb_put function arises, so to complete the upload using this command you will need to iterate:
$ret = ftp_nb_put($my_connection, "test.remote", "test.local", FTP_BINARY);
while ($ret == FTP_MOREDATA) {
$ret = ftp_nb_continue($my_connection);
}
there are the following directives to take into account so you can upload files with big size, this directives are located in php.ini and can not be modified from current script:
; Maximum allowed size for uploaded files.
upload_max_filesize = XXM
; Must be greater than or equal to upload_max_filesize
post_max_size = XXM
where XX are the number of Mb. do not forget to put M,
After any Modification it will be neccesary to restart server.

Answer 2

If you want to transfer the whole file at once, use ftp_put(), not ftp_nb_fput(). It'll make your code a bit simpler:
$connection_to = ftp_connect($host_to);
$ftp_to = ftp_login($connection_to, $user_to, $pass_to);
$local_file = $directory_to_move_files . $file_to_move;
ftp_put($connection_to, $file_to_move, $local_file, FTP_BINARY);
ftp_close($connection_to);
Side note: don't use FTP_ASCII unless you're absolutely sure the file you're transferring is plain text. It will corrupt binary files, including images. Using FTP_BINARY is always safe.