rollbot.php

<?php
$post = json_decode(file_get_contents("php://input"));
if (!$post) {
    exit;
}
$max = 100;
$text = trim(substr($post->text, strlen($post->trigger_word)));
if ($text && is_numeric($text)) {
    $max = $text;
}
echo json_encode([
    'text' => "(0-$max) " . rand(0, $max)
], JSON_UNESCAPED_SLASHES);