How can the current active directory be set in PHP to facilitate successful FTP upload to a specific folder?

To successfully upload files via FTP to a specific folder, you can set the current active directory in PHP using the `ftp_chdir()` function. This function allows you to change the current directory on the FTP server before uploading files. By setting the active directory to the desired folder, you ensure that the files are uploaded to the correct location.

$ftp_server = 'ftp.example.com';
$ftp_username = 'your_username';
$ftp_password = 'your_password';
$ftp_connection = ftp_connect($ftp_server);
ftp_login($ftp_connection, $ftp_username, $ftp_password);

$target_directory = '/path/to/target_folder';
ftp_chdir($ftp_connection, $target_directory);

$file_to_upload = 'file.txt';
ftp_put($ftp_connection, $file_to_upload, $file_to_upload, FTP_BINARY);

ftp_close($ftp_connection);