PHPでPOST送信する方法

こんな感じ

<?php
$url = "https://qiita.com/api/v1/auth";
$data = array(
    'url_name' => $url_name,
    'password' => $password
);
$content = http_build_query($data);
$options = array('http' => array(
    'method' => 'POST',
    'content' => $content
));
$contents = file_get_contents($url, false, stream_context_create($options));

print($contents);
?>