PHP Script Won't Upload to FTP Server - - php

Question

Having spent hours on this, I am out of luck. This script worked perfectly until yesterday. The script generates XML and dumps it as a file (5kb) to a remote FTP server. The script has not changed, nor has our host changed anything. The FTP server company has changed something (they said IP change yesterday) (but claims nothing apart from this). This IP resulted in a different ftp_server which has worked fine.
When I attempt to run the script, I get the following error regardless of whether "ftp_pasv($conn_id, true);" is there or not / disabled:
Warning: ftp_fput() [function.ftp-fput]: Opening ASCII mode data connection in ...
Then it gives the line which contains "FTP_ASCII" below.
When I have the ft_pasv section there only (as per original script), an additional error of the following still appears with the following:
Warning: ftp_fput() [function.ftp-fput]: data_accept: SSL/TLS handshake failed in ...
This is for the same line as the above error.
They were originally on a self-signed SSL. Now, due to my issue, they are now on a 'correct' SSL issued by a well known company. No errors display on Filezilla upon connecting.
Importantly, I can upload via Filezilla with no issues, with or without passive mode
Code above the below code in the script is correct for generating the file as it appears on the script page, once loaded. It just won't dump the file on the server. Here is the connecting to the server bit:
//Connect to the FTP server
$ftp_server = 'import.ftpserverdomain.com';
$ftp_user_name = 'CORRECT-USERNAME';
$ftp_user_pass = 'CORRECT-PASSWORD';
// set up basic ssl connection
$conn_id = ftp_ssl_connect($ftp_server) or die("CONNECTION ERROR");
// login with username and password
$login_result = ftp_login($conn_id, $ftp_user_name, $ftp_user_pass) or die("LOGIN ERROR");
$directory = ftp_pwd($conn_id); // /
ftp_pasv($conn_id, true);
$fp = fopen($filename, 'w');
fputs($fp,$file_contents);
fclose($fp);
$fp = fopen($filename, 'r');
$path_with_file = $directory.$filename;
if (ftp_fput($conn_id, $path_with_file, $fp, FTP_ASCII)) {
echo "Successfully Uploaded $File\n";
} else {
echo "There was a problem while uploading $File\n";
}
fclose($fp);
unlink($filename);
ftp_close($conn_id);
Any help is much appreciated. Sorry if I lacked any information. I'll be happy to provide any.

Answer 1

It sounds to me like PHP can't find your CA Certs, if you are running this on a linux box, this is something I have encountered before. Some searching should help but basically PHP's OpenSSL integration needs pointing at your cacerts directory so it can use these to validate the SSL connection it is attempting to make.

Answer 2

I fixed this issue. Hopefully this helps someone. The issue turned out to be server (HostGator). They do not allow FTP over TLS on a shared account.
Despite this working for a year, switching hosts resolved the issue.