How to send API link via POST request?

Question

PHP

Hello.
--
I have an API link that writes the passed parameters to a database table.
I did it according to the php documentation (I can't use curl)
The principle I use is this:

...
$url = 'http://server.com/path';
$data = array('key1' => 'value1', 'key2' => 'value2');

$options = array(
    'http' => array(
        'header'  => "Content-type: application/x-www-form-urlencoded",
        'method'  => 'POST',
        'content' => http_build_query($data)
    )
);
$context  = stream_context_create($options);
$result = file_get_contents($url, false, $context);
...

There are no errors, nothing comes up. Sending via Ajax. The message on email comes, record in a DB does not arrive.
What's wrong? Why doesn't it send?
I inserted a direct link into the browser, the request is sent, the entry in the database appears. As you understand, a link with parameters.
Maybe this method is not suitable for this?