php将本地文件上传到ftp服务器

Question

i understand that the ftp_put method uploads a file from the local server computer to the ftp server but i have problems using it where when i try to execute a simple script like this:

 <?php
// connect and login to FTP server
$ftp_server = "ftp.example.com";
$ftp_conn = ftp_connect($ftp_server) or die("Could not connect to $ftp_server");
$login = ftp_login($ftp_conn, $ftp_username, $ftp_userpass);
$file = "localfile.txt";
// upload file
if (ftp_put($ftp_conn, "serverfile.txt", $file, FTP_ASCII))
{
echo "Successfully uploaded $file.";
}
else
{
echo "Error uploading $file.";
}

// close connection
ftp_close($ftp_conn);
?>  

the operation is successfully done except for that the file uploaded to the my ftp server is always with zero byte size!

also i tried to enable passive mode but it still uploads an empty file.

Answer 1

Try enabling track_errors and access $php_errormsg

ini_set('track_errors', 1);
// put operation
// if error
var_dump($php_errormsg);