<?php
    $oneSignalHeader = array('Content-Type' => 'application/json; charset=utf-8',
                                 'Authorization' => 'Basic'.$KEY);
    $content = array(
        "en" => "제목"
    );
    $headings = array(
        "en" => "내용"
    );
    $fields = array(
        'app_id' => "e65616cf-e050-438c-8512-418e257ab4e6",
        'include_player_ids' => array('0d1d74d4-12a4-43bb-b66f-5e58e6664f88'),
        'contents' => $content,
        'headings' => $headings,
    );
    $fields = json_encode($fields);
    $response = Requests::post("https://onesignal.com/api/v1/notifications", $oneSignalHeader, $fields);
    $ret = json_decode($response->body);
    var_dump($ret);

?>