<?php
$token = "..."; // тут токен

function vk($method, $params = array()) {
	global $token;
	$paramstr = http_build_query($params);
	$url = "https://api.vk.com/method/" . $method . "?" . $paramstr . "&v=5.27&access_token=" . $token;
	$ch = curl_init();
	curl_setopt($ch, CURLOPT_HEADER, 0);
	curl_setopt($ch, CURLOPT_VERBOSE, 0);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	curl_setopt($ch, CURLOPT_URL, $url);
	$r = json_decode(curl_exec($ch));
    curl_close($ch);
	return $r;
}

$file = "test.mp3";
$r = vk("audio.getUploadServer");
var_dump($r);
$ch = curl_init($r->response->upload_url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_VERBOSE, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, array("file" => "@test.mp3"));
$r = json_decode(curl_exec($ch));
var_dump($r);
curl_close($ch);

$r = vk("audio.save", array(
    "server" => $r->server,
    "audio" => $r->audio,
    "hash" => $r->hash,
    "artist" => "test artist",
    "title" => "test title"
));
var_dump($r);
?>