Imports Markdown files in a local directory into a WordPress installation

markdown-import.php

<?php
// Turn on all error reporting so we can see if anything goes wrong
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(-1);

// Relative path to your wp-config.php file (to connect to the database)
require '../wp-config.php';
require './frontmatter.php'; // Parses YAML frontmatter - https://github.com/Modularr/YAML-FrontMatter
require './Parsedown.php'; // Markdown parser - https://github.com/erusev/parsedown
$parsedown = new Parsedown();

// CHANGE TO YOUR SITE
$site_domain = 'http://vancelucas.com';
$markdown_file_relative_dir = 'blog/';

$db = mysql_connect(DB_HOST, DB_USER, DB_PASSWORD) or die(mysql_error());
mysql_select_db(DB_NAME, $db) or die(mysql_error());

$files = scandir($markdown_file_relative_dir);
array_shift($files); // .
array_shift($files); // ..

// OPTIONAL: Delete all posts beforehand - useful for tweaking this script to get it just right until it works
//delete_all_posts($db);

foreach($files as $fn) {
	import_md($fn);
}

function delete_all_posts($db) {
	mysql_query("TRUNCATE wp_posts", $db);
	mysql_query("TRUNCATE wp_postmeta", $db);
}

function import_md($fn) {
	global $db, $parsedown, $markdown_file_relative_dir;

	$mdFile = __DIR__ . '/' . $markdown_file_relative_dir . $fn;
	$md = file_get_contents($mdFile);
	$post = new FrontMatter($md);

	$title = trim($post->fetch('title'), "'\" ");
	$date = $post->fetch('date');
	$date = date('Y-m-d H:i:s', strtotime($date));
	$body = $post->fetch('content');
	$tags = explode(',', str_replace(array("'", '[', ']'), '', $post->fetch('tags')));

	// Slug is filename - remove date from beginning, and extensions from end
	$slug = substr($fn, 11);
	$slug = preg_replace('/-+/', '-', substr($slug, 0, strpos($slug, '.')));

	// Build full permalink
	$permalink = $site_domain . '/blog/' . $slug . "\n";

	// Replace 'READMORE' with WordPress equivalent
	$body = str_replace('READMORE', '<!--more-->', $body);

	$title = mysql_escape_string($title);
	$body_md = mysql_escape_string($body);
	$body_html = mysql_escape_string(str_replace(array("\r\n", "\r", "\n"), " ", $parsedown->text($body)));

	echo 'Imported: ' . $permalink . " (tags: " . implode($tags, ',') . ")<br />\n";

	$sql = "INSERT INTO wp_posts (post_author, post_date, post_date_gmt, post_content, post_content_filtered, post_title, post_status, comment_status, ping_status, post_name, post_modified, post_modified_gmt, post_parent, post_type) VALUES ";
	$sql .= "(1, '$date', '$date', '$body_html', '$body_md', '$title', 'publish', 'closed', 'open', '$slug', '$date', '$date', 0, 'post')";
	mysql_query($sql, $db);
	$id = mysql_insert_id($db);
	wp_set_post_tags($id, $tags, false);
	mysql_query("UPDATE wp_posts SET guid = '$site_domain/?p=$id' WHERE ID = $id", $db);
	mysql_query("INSERT INTO wp_postmeta (post_id, meta_key, meta_value) VALUES ($id, '_sd_is_markdown', '1')", $db);
}

Usage:

1. Upload all your markdown files somewhere on the same server as your WordPress installation
2. Upload this file (markdown-import.php) to the same place as your markdown files
3. Tweak some settings to specify your domain and directory
4. Go download 'Parsedown.php' and 'frontmatter.php', and place them in the same directory as this file (markdown-import.php)
5. Run the PHP file (open markdown-import.php in your browser).
6. Make any adjustments needed, and enjoy!

Do all the markdown files need to be in the same folder? Or can they be in a subfolders for example I have Hugo blog and the blog are broken down into a folder by the month and year. Our goal is to convert our Hugo site to wordpress.

This is kinda vague "Tweak some settings to specify your domain and directory" Which file do we have to tweak?