bot_functions.php

<?php


function echo_ok() {
    ob_start();
    echo 'ok';
    $length = ob_get_length();
    header('Connection: close');
    header("Content-Length: " . $length);
    header("Content-Encoding: none");
    header("Accept-Ranges: bytes");
    ob_end_flush();
    ob_flush();
    flush();
    fastcgi_finish_request();
}

function vk_message_send($user_id, $reply, $token, $doc='') {
    $parameters = [
        'message' => $reply,
        'user_id' => $user_id,
        'attachment' => $doc,
        'access_token' => $token
    ];
    $curl_result = vk_request('messages.send', $parameters, $token);
    return $curl_result;
}

function vk_start_typing($user_id, $token) {
    $parameters = [
        'type' => 'typing',
        'user_id' => $user_id,
        'access_token' => $token,
        'v' => '5.63'
    ];
    $curl_result = vk_request('messages.setActivity', $parameters, $token);
    return $curl_result;
}

function message_send($user_id, $reply, $token, $doc='') {
    $curl_result = vk_message_send($user_id, $reply, $token, $doc);
    return $curl_result;
}

function vk_request($method, $parameters, $token='') {
    $parameters['access_token'] = $token;
    $parameters['v'] = '5.73';
    return post_request('https://api.vk.com/method/'.$method, $parameters);
}

function post_request($url, $parameters=[]) {
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($parameters));
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $curl_result = curl_exec($ch);
    curl_close($ch);
    return $curl_result;
}

function post_json($url, $parameters=[]) {
    $content = json_encode($parameters);
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_HEADER, false);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER,
        array("Content-type: application/json"));
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $content);
    $curl_result = curl_exec($ch);
    curl_close($ch);
    return $curl_result;
}

function vkApi_upload($url, $file_name) { 
  $curl = curl_init($url); 
  curl_setopt($curl, CURLOPT_POST, true); 
  curl_setopt($curl, CURLOPT_RETURNTRANSFER, true); 
  curl_setopt($curl, CURLOPT_POSTFIELDS, array('file' => new CURLfile($file_name))); 
  $json = curl_exec($curl); 
  curl_close($curl); 
  return $json; 
} 

function uploadVoiceMessage($filename, $token, $user_id) {
    $getUploadServer = vk_request('docs.getMessagesUploadServer', array('peer_id' => $user_id, 'type' => 'audio_message'), $token);
    $uploadServerUrl = json_decode($getUploadServer)->response->upload_url;
    $upload_result = vkApi_upload($uploadServerUrl, $filename);
	unlink($filename);
    $doc  = json_decode(vk_request('docs.save', array('file' => json_decode($upload_result)->file, 'title' => 'Voice message'), $token))->response[0];
    return "doc".$doc->owner_id.'_'.$doc->id;
}