ipbRESTAPI.php

<?php
function getRecentForumTopics() {
	$communityUrl = 'http://www.domain.com/';
	$apiKey = 'API KEY';
	$endpoint = '/forums/topics';
	$vars = '?sortDir=desc&perPage=4';

	$curl = curl_init( $communityUrl . 'api' . $endpoint.$vars );
	curl_setopt_array( $curl, array(
		CURLOPT_RETURNTRANSFER	=> TRUE,
		CURLOPT_HTTPAUTH	=> CURLAUTH_BASIC,
		CURLOPT_USERPWD		=> "{$apiKey}:"
	) );
	$response = curl_exec( $curl );
	$values = json_decode($response, true);
	$data = '';
	foreach($values['results'] as $value) {
		$data[] = [
			'title' => $value['title'],
			'url' => $value['firstPost']['url']
		];
	}
	return $data;
}

function getRecentForumPosts() {
	$communityUrl = 'http://www.domain.com/';
	$apiKey = 'API KEY';
	$endpoint = '/forums/posts';
	$vars = '?sortDir=desc&perPage=4';

	$curl = curl_init( $communityUrl . 'api' . $endpoint.$vars );
	curl_setopt_array( $curl, array(
		CURLOPT_RETURNTRANSFER	=> TRUE,
		CURLOPT_HTTPAUTH	=> CURLAUTH_BASIC,
		CURLOPT_USERPWD		=> "{$apiKey}:"
	) );
	$response = curl_exec( $curl );
	$values = json_decode($response, true);
	$data = '';
	foreach($values['results'] as $value) {
		$data[] = [
			'title' => $value['content'],
			'url' => $value['url']
		];
	}
	return $data;
}

echo '<h2>Recent Topics</h2>';
$array = getRecentForumTopics();
echo '<ol>';
foreach($array as $key => $item) {
	echo '<li><a href="'.$item['url'].'" target="_blank">'.$item['title'].'</a></li>';
	if($key == 4) {
		break;
	}
}
echo '</ol>';

echo '<h2>Recent Posts</h2>';
$array = getRecentForumPosts();
echo '<ol>';
foreach($array as $key => $item) {
	echo '<li><a href="'.$item['url'].'" target="_blank">'.$item['title'].'</a></li>';
	if($key == 4) {
		break;
	}
}
echo '</ol>';