【サンプルコード付き】LivedoorブログのLINE更新通知機能をWordPressでも使えるようにする

xxxx-child(子テーマフォルダ)
├functions.php(元からある)
└livedoor(作る)
　　 ├assets(作る)
　　 │　 ├HTTP(展開して持ってくる)
　　 │ 　└Net(展開して持ってくる)
　　 │
　　 └livedoor_autopost.php(作る)

<?php

function livedoor_notice($post_info)
{
    $path = dirname(__FILE__) . '/assets';
    set_include_path(get_include_path() . PATH_SEPARATOR . $path);
    require_once 'HTTP/Request2.php';
    $id = '[自分のlivedoorID]';
    $rootEndPoint = '[先程メモしたルートエンドポイント]';
    $key = '[先程メモしたAtomPub用パスワード]';
    $url = "https://livedoor.blogcms.jp/atom/blog/{$id}/article";
    $title = $post_info['title'];
    $description = "<a href='{$post_info['url']}'>ここをクリックして記事を読む</a><script>location.href='{$post_info['url']}';</script>";
    $description2 = "<a href='9ketsuki.info'>9ketsuki.info</a>";
    $category = 'notify';
    $created = date('Y-m-d\TH:i:s\Z');
    $nonce = pack('H*', sha1(md5(time())));
    $pass_digest = base64_encode(pack('H*', sha1($nonce . $created . $key)));
    $wsse =
        'UsernameToken Username="' . $id . '", ' .
        'PasswordDigest="' . $pass_digest . '", ' .
        'Nonce="' . base64_encode($nonce) . '", ' .
        'Created="' . $created . '"';
    $rawdata =
        '<?xml version="1.0" encoding="utf-8"?>' .
        '<entry xmlns="http://www.w3.org/2005/Atom" xmlns:app="http://www.w3.org/2007/app" xmlns:blogcms="http://blogcms.jp/-/spec/atompub/1.0/">' .
        '<title>' . $title . '</title>' .
        '<category term="' . $category . '" />' .
        '<blogcms:source>' .
        '<blogcms:body><![CDATA[' . $description . ']]></blogcms:body>' .
        '<blogcms:more><![CDATA[' . $description2 . ']]></blogcms:more>' .
        '</blogcms:source>' .
        '</entry>';
    $headers = array(
        'X-WSSE: ' . $wsse,
        'Expect:',
    );
    try {
        $req = new HTTP_Request2();
        $req->setUrl($url);
        $req->setMethod(HTTP_Request2::METHOD_POST);
        $req->setHeader($headers);
        $req->setBody($rawdata);
        $response = $req->send();
    } catch (HTTP_Request2_Exception $e) {
        die($e->getMessage());
    } catch (Exception $e) {
        die($e->getMessage());
    }
}
 

function send_livedoor($post_id) {
	require_once('livedoor/livedoor_autopost.php');
    	$post = get_post($post_id);
    	$send_title = $post->post_title;
	$url = get_permalink($post_id);
	$post_info = [
		'url' => $url,
		'title' => $send_title
	];
	livedoor_notice($post_info);
    return;
}
add_action( 'publish_post', 'send_livedoor', 1 ,6);