nitterのrssのプロキシ。slackのrssリーダーが何度取りに来ても、9時以降に1日1度しかnitterにアクセスしない。レンタルサーバー などに設置して使う。

index.php

<?php
if (!array_key_exists('category', $_GET)) {
    exit('¯\_(ツ)_/¯');
}

date_default_timezone_set('Asia/Tokyo');

$pdo = new PDO('sqlite:db.sqlite');
$pdo->exec(<<<'EOL'
    create table if not exists tbl_rss (
        id        integer not null primary key,
        body      text not null,
        last_date datetime not null
    );
EOL);

$now = new DateTimeImmutable;
if ($now > $now->setTime(9, 0, 0)) {
    $borderDateTime = $now->setTime(9, 0, 0);
} else {
    $borderDateTime = $now->modify('-1 day')->setTime(9, 0, 0);
}

$stmt = $pdo->prepare('select body, last_date from tbl_rss where id = ?');
$stmt->execute([$_GET['category']]);
$res = $stmt->fetch(PDO::FETCH_NUM);
[$body, $lastDateTimeString] = $res ?: ['', null];

if (is_null($lastDateTimeString) or $borderDateTime > new DateTimeImmutable($lastDateTimeString)) {
    file_put_contents((new DateTimeImmutable())->format('YmdHis') . '.log',json_encode(['category' => $_GET['category']]));
    switch($_GET['category']) {
        case 1:
            // 社畜ちゃん
            $body = file_get_contents('https://nitter.net/vitaone_/search/rss?f=tweets&q=最新話&f-images=on&e-nativeretweets=on');
            break;
        case 2:
            // ハンバーガーちゃん
            $body = file_get_contents('https://nitter.net/HundredBurger/search/rss?f=tweets&q=できた+OR+出来た+OR+出来ました&f-media=on&e-nativeretweets=on');
            break;
        default:
            exit('¯\_(ツ)_/¯');
    }
    $stmt = $pdo->prepare('replace into tbl_rss values(?,?,?)');
    $stmt->execute([$_GET['category'], $body ?? '', $now->format('Y-m-d H:i:s')]);
}

header('Content-Type: application/rss+xml; charset=utf-8');
echo $body;