Question: I want to collect a list of videos uploaded on a specific channel using the YouTube data API. However, before implementing online I am trying to get my code running on an offline environment (WAMPserver, PHP 5.5.12, Apache 2.4.9). I am using the following code:

```
require_once 'google-api-php-client-2.0.0-RC5/vendor/autoload.php';

$client = new Google_Client();
$client->setApplicationName("SRC_Thor");
$client->setDeveloperKey("xxxxxxxxxxx");

$youtube = new Google_Service_YouTube($client);

$channelResponse = $youtube->channels->listChannels('contentDetails', []);
var_dump($channelResponse);

```

However it gives the following error: 

> 
> Fatal error: Uncaught exception 'GuzzleHttp\Exception\RequestException' with message 'cURL error 60: SSL certificate problem: unable to get local issuer certificate (see `http://curl.haxx.se/libcurl/c/libcurl-errors.html`)'
> 
> 
> 

I have tried adding the latest version of `cacert.pem` as most topics on SO offer as a solution, however to no avail.

Answer: 
If you are on Windows using Xampp, I am stealing a better answer from [here](https://stackoverflow.com/a/34883260), would be helpful if Google shows you this question first.

1. Download and extract for cacert.pem here (a clean file format/data)

> 
> <https://curl.haxx.se/docs/caextract.html>
> 
> 
>
2. Put it in :

> 
> C:\xampp\php\extras\ssl\cacert.pem
> 
> 
>
3. Add this line to your php.ini

> 
> curl.cainfo = "C:\xampp\php\extras\ssl\cacert.pem"
> 
> 
>
4. restart your webserver/Apache
```
$guzzleClient = new \GuzzleHttp\Client(['verify' => false]);

```