<?php
/*
Plugin Name: Write Latest
Description: Write the title, author and url of the latest post to a text file.
Version: 0.1
Author: zeroday
Author URI: http://www.google.com
Plugin URI: http://www.google.com
*/

define('LOC', '../latest.txt');

function write_latest() {

	ini_set('display_errors', 0);
	
	global $wpdb;
	$wpdb->hide_errors();

	$result = $wpdb->get_results ('SELECT ID, post_title, post_author FROM ' . $wpdb->posts . ' WHERE post_status = "publish" ORDER BY ID DESC LIMIT 1');
	
	if ($result) {
	
		$title = $result[0] -> post_title;
		$pid = $result[0] -> ID;
		$aid = $result[0] -> post_author;
		
		$url = get_permalink($pid);
	
	}
	
	$result = $wpdb->get_results ('SELECT display_name FROM '. $wpdb->users . ' WHERE ID = "' . $aid . '" LIMIT 1' );

	if ($result) {
	
		$author = $result[0]->display_name;
	}
	
	$stuff = "$title | $author | $url";
		
	file_put_contents(LOC, $stuff);
	
	ini_restore('display_errors');
		
}

add_action('publish_post', 'write_latest');