download a file from sftp in php

sshconnect-php.php

<?php
// https://stackoverflow.com/questions/17687607/php-download-from-remote-server-via-sftp#17688779
// set up SFTP server details
$host = '';
$port = 22;
$username = '';
$password = ';
$file = 'fileToDownload.csv';

$remoteDir = '/complete/path/to/dir/';
$localDir = 'relativepath';

if (!function_exists("ssh2_connect"))
    die('Function ssh2_connect not found, you cannot use ssh2 here');

if (!$connection = ssh2_connect($host, $port))
    die('Unable to connect');

if (!ssh2_auth_password($connection, $username, $password))
    die('Unable to authenticate.');

if (!$stream = ssh2_sftp($connection))
    die('Unable to create a stream.');

if (!$dir = opendir("ssh2.sftp://{$stream}{$remoteDir}"))
    die('Could not open the directory');


echo "Copying file: $file\n";
if (!$remote = @fopen("ssh2.sftp://{$stream}/{$remoteDir}{$file}", 'r')) {
    echo "Unable to open remote file: $file\n";
} else {
    if (!$local = @fopen($localDir . $file, 'w')) {
        echo "Unable to create local file: $file\n";
    } else {
        $read = 0;
        $filesize = filesize("ssh2.sftp://{$stream}/{$remoteDir}{$file}");
        while ($read < $filesize && ($buffer = fread($remote, $filesize - $read))) {
            $read += strlen($buffer);
            if (fwrite($local, $buffer) === FALSE) {
                echo "Unable to write to local file: $file\n";
                break;
            }
        }
    }
}




fclose($local);
fclose($remote);


ssh2_exec($connection, 'exit');
unset($connection);


echo "Converting File\n";
$temp_output = $localDir.'output.csv';

if (false !== ($ih = fopen($localDir.$file, 'r'))) {
    $oh = fopen($temp_output, 'w');

    // Operations on file
    echo "Converted\n";

    fclose($ih);
    fclose($oh);

    echo "Deleting Temporary File\n";
    unlink($localDir.$file);
    echo "Renaming File\n";
    rename($temp_output,$localDir.$file);
    echo "Completed";

}