Quick recipe on how to the latest .zip file from a ftp server

ftp.php

<?php

$ftpConnection = array(
	'host' => 'server.co.nz',
	'username' => 'username',
	'password' => 'secret-password'
);

// set up basic connection
$connection = ftp_connect($ftpConnection['host']);

if(!$connection) {
	throw new Exception('Can\'t connect to host: "'.$ftpConnection['host'].'"');
}
echo 'login'.PHP_EOL;
$loginResult = ftp_login($connection, $ftpConnection['username'], $ftpConnection['password']);
if(!$loginResult) {
	throw new Exception('Can\'t login to host: "'.$ftpConnection['host'].'" with user "'.$ftpConnection['username'].'"');
}

echo 'listing files'.PHP_EOL;
$files = ftp_nlist($connection, '');
if(!$files) {
	throw new Exception('Can\'t find a list of file on host: "'.$ftpConnection['host'].'"');	
}

// Only choose from .zip files
$files = array_filter($files, function($file) {
	$dotted = explode('.', $file);
	$suffix = array_pop($dotted);
	if(strtolower($suffix) == 'zip') {
		return true;
	}
});

natcasesort($files);

$remoteFile = array_pop($files);
$localFile = $remoteFile;
echo 'downloading '.$remoteFile.PHP_EOL;
$handle = fopen($localFile, 'w');
if(!ftp_fget($connection, $handle, $remoteFile, FTP_BINARY, 0)) {
	throw new Exception('Failed downloading remote file'.$remoteFile,' to local file '.$localFile);	
}

ftp_close($connection);
fclose($handle);

echo 'unzipping '.$remoteFile.PHP_EOL;
$destinationFolder = '/tmp/';
$zip = new ZipArchive();
if ($zip->open($localFile) === TRUE) {
    $zip->extractTo($destinationFolder);
    $zip->close();
} else {
	throw new Exception('Failed to unzip '.$localFile,' to directory "'.$destinationFolder.'"');	   
}

return $destinationFolder.$localFile;