Upload a dir content asynchronously to a ftps using curl and php

curl ftps async upload

<?php
        $src_dir = '/some/local/directory';
	$curl = array();

	$ftpserver = 'ftp.example.com';
	$ftp_path   = "/remotedirectory";
	$ftp_user   = 'johndo';
	$ftp_password   = 'foobar';

	$mh = curl_multi_init();

	$files = glob($src_dir . '/*.zip');
	foreach ($files as $i => $local_file) {

		$ch = $curl[$i] = curl_init();
		$fp = fopen($local_file, "rb");
		$local_file = basename($local_file);

		$remoteurl = "ftps://$ftp_user:$ftp_password@$ftpserver/$ftp_path/$local_file";

		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
		curl_setopt($ch, CURLOPT_URL, $remoteurl);
		curl_setopt($ch, CURLOPT_UPLOAD, 1);
		curl_setopt($ch, CURLOPT_INFILE, $fp);
		curl_setopt($ch , CURLOPT_USERPWD, $ftp_user . ':' . $ftp_password);

		curl_multi_add_handle ($mh, $ch);
	}

	do {
		$n=curl_multi_exec($mh,$active);
	} while ($active);

	foreach ($curl as $ch) {
		$res[$i]=curl_multi_getcontent($ch);
		curl_multi_remove_handle($mh, $ch);
		echo "error: . " curl_error($ch) . "\n";
		curl_close($ch);
	}
	curl_multi_close($mh);