Curl Ftp remote uploads (download/upload)

This function is part of teCommunication Server class that I decide to change and remove from class. So it would be sad not to publish it because someone would need it. Also there are educational purpose. Reason that I will remove this function from teCommunication Server class is problem with large files because this function use file_get_contents() PHP function to get remote file content. I will now try to explain code.

This is how you call function :

ftpCurlUploader(array('protocol', 'host/server', 'path', 'user_name', 'password', 'port'),
array('protocol', 'host/server', 'path', 'name', 'password', 'port'), 'file_to_upload');

protocol = ftp, ftps
host/server = server/host name or IP address
path = file path to folder where is file we download or upload eg. http://host/folder/file.txt
user_name = user name to login to server
password = password to login to server
port = port :  ftp-21, ftps-990 or 21 (implicit or explicit ftps)
file_to_upload = file name on remote server with extension

ftpCurlUploader(array('protocol', 'host/server', 'path', 'user_name', 'password', 'port'),
'path_to_local_file', 'file_to_upload');

path_to_local_file = if you  want to upload local  file just set server path to local file.

function ftpCurlUploader($uploadPath, $filePath, $fileName){
      if(extension_loaded('curl')) {
      echo "PHP do not have curl extensions loaded. Please enable: curl extension.";
      exit();
      }

We just check if cURL extension is enabled on our server if not exit after error message.

if(is_array($filePath)){
$wFile = file_get_contents("".$filePath[0]."://".$filePath[3].":
".$filePath[4]."@".$filePath[1].":
".$filePath[5]."/".$filePath[2]."/".$fileName);
$chSize = filesize($tempFile);

Here we read entire external file into a string. And check file size. This is for remote file download/upload.

$tempFile = tempnam("tmp/", "test");

We make temporary file with name test. We can make folder tmp and set path to it or if path do not exist tempnam() will use system temporary folder. We use this file to put external file content in it.

$writeTempFile = fopen($tempFile, "w");
fwrite($writeTempFile, $wFile);

Open temporary file and write remote file content in it.

fclose($writeTempFile);

Close file.

}else{
$wFile = fopen($filePath.$fileName,'rb');
$chSize = filesize($filePath.$fileName);
}

This is option if we want just to upload local file to FTP.

if(!empty($uploadPath[2])){
	$uploadPath[2] = $uploadPath[2]."/";
}else{
	$uploadPath[2] = "";
}

If we have FTP access to domain root not server root.

Now we set up curl session for FTP upload I will explain some stuff but not all:

$curl_init = curl_init();
curl_setopt($curl_init, CURLOPT_URL, "".$uploadPath[0]."://".		// ftp or ftps
  $uploadPath[3].":".			// ftp user name
  $uploadPath[4]."@".			// ftp password
  $uploadPath[1].":".			// ftp server
  $uploadPath[5]."/".			// ftp port ftp:21   ftps: 443
  $uploadPath[2].				// ftp path eg. if you have direct access no needed just leave "" whan you call function
  $fileName);

if( $uploadPath[0] == 'ftps'){

	curl_setopt($curl_init, CURLOPT_SSL_VERIFYPEER, false);
	curl_setopt($curl_init, CURLOPT_SSL_VERIFYHOST, false);
	curl_setopt($curl_init, CURLOPT_FTP_SSL, CURLOPT_FTPSSLAUTH);
	curl_setopt($curl_init, CURLOPT_SSLVERSION, 3);

}
   curl_setopt($curl_init, CURLOPT_UPLOAD, 1);
   curl_setopt($curl_init, CURLOPT_INFILE, $wFile);
   curl_setopt($curl_init, CURLOPT_INFILESIZE, $chSize);
   curl_exec ($curl_init);
   $curl_error = curl_error($curl_init);
   curl_close ($curl_init);

if(!empty($curl_error)) {
   $this->errorMessage($curl_error);
}
   fclose($wFile);
}

Just concat code in some sections because I must break lines to be able to fit to screen. This is tested code working with ftp and ftps (ftp over ssl).