Integrating Wordpress with Opencart - php

Question

I have an opencart shop and wordpress installation running on the same server and I would like to grab a few articles and show them on the product page in opencart.
Here is the code I inserted on my product page template, however I'm having problems:
<?php
require('blog/wp-blog-header.php');
?>
<?php
$posts = get_posts('numberposts=3&order=ASC&orderby=post_title');
foreach ($posts as $post) : setup_postdata( $post ); ?>
<?php the_date(); echo "<br />"; ?>
<?php the_title(); ?>
<?php the_excerpt(); ?>
<?php
endforeach;
?>
I'm gettings this error
Notice: Constant DB_PASSWORD already defined in /home/admin/web/domain.com/public_html/blog/wp-config.php on line 29
ERROR ESTABLISHING A DATABASE CONNECTION
I know DB_PASSWORD is also used by the opencart config, is this the problem? And more importantly is there a solution to this problem?

Answer 1

i think there is a better way to fetch posts from WordPress.
use wp-api to get your posts in json format. then you can process on it as you want.
here is a simple function in php (i have used it as a helper in CodeIgniter.
function blog_posts($site_url = 'http://yoursite.com/', $cat_id = 1, $count = 5, $thumbnails = true)
{
$url = $site_url . 'wp-json/wp/v2/posts?';
$url_data = [
'categories' => $cat_id,
'per_page' => $count,
];
$url_data = http_build_query($url_data, 1, '&');
if ($thumbnails) {
$url_data = $url_data . '&_embed';
}
$final_url = $url . $url_data;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $final_url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$result = curl_exec($ch);
return $result;
}

Answer 2

An even simpler way could be to use RSS.
Most blogs should produce an RSS feed containing the content you need - this will be quicker and easier to get than an API.
You can then see this answer about how the parse the RSS XML from PHP:
Best way to parse RSS/Atom feeds with PHP