<?php
$postdata = http_build_query(['test' => 'data']);
$opts = ['http' =>
    [
        'method'  => 'POST',
        'header'  => 'Content-type: application/x-www-form-urlencoded',
        'content' => $postdata
    ]
];

$context  = stream_context_create($opts);

echo file_get_contents('http://glasulvietii.ro/', false, $context); //merge
echo file_get_contents('http://glasulvietii.ro/test.php', false, $context); //merge
//test.php e un fișier care face var_dump la $_POST