ftp_size returns -1 after a file is uploaded using curl

Question

My script packs some files with ZIP then uploads this ZIP to another server. After the upload it checks size of the ZIP on the FTP and locally. If sizes are the same- the local ZIP is deleted.

The problem is ftp_size() returns -1. But only in the real script. In my test script it works fine.

Test script works like this:

$f = ftp_connect(HOST);
$res = ftp_login($f, USER, PASS); 
$fname = 'archive_2018-09-18_13-39';
$fsize = ftp_size($f, "$fname-img.zip").''; 
$fsize2 = filesize("backup/$fname-img.zip").''; 
echo $fsize . '<br>' . $fsize2;

and it returns:

22907946995
22907946995

The real script works like this:

$f = ftp_connect(HOST);
$res = ftp_login($f, USER, PASS); 
$fname = 'archive_' . date('Y-m-d_H-i');

exec("zip -r -0 backup/$fname-img.zip  \"website\" 2>&1");
exec('curl -T "' . "backup/$fname-img.zip" . '" ftp://' . HOST . ' --user ' . USER . ':' . PASS . ' 2>&1');

$fsize = ftp_size($f, "$fname-img.zip").''; 
$fsize2 = filesize("backup/$fname-img.zip").''; 
echo $fsize . '<br>' . $fsize2;

and it shows:

-1
22907946995

Real script uploads file just fine. It just doesn't show correct size on the FTP server. So it's not a problem with size of the file and not a problem with FTP connection.

Answer 1

Try moving ftp_connect only after the call to curl. There is possibly some caching involved that prevents the FTP server from returning correct size immediately, if the file is uploaded using a different connection.

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Though I'd strongly suggest you to use PHP functions to upload the file.