Month: February 2011

< ?php
/*
Plugin Name: roga's url hotfix
Plugin URI: http://blog.roga.tw/2011/02/%E5%8A%A0%E5%BC%B7%E9%83%A8%E8%90%BD%E6%A0%BC%E7%9A%84-seo/
Description: redirect http requests.
Version: 0.1
Author: roga
Author URI: http://blog.roga.tw
License: GPL v2
*/

function roga_wrap()
{
	GLOBAL $wpdb;
	$request_uri = getenv('REQUEST_URI');

	$array = explode('/', $request_uri);

	$status = TRUE;

	foreach($array as $row)
	{
		if( ! is_numeric($row) && ! empty($row)) $status = FALSE;
	}

	if(count($array) != 5 || $status != TRUE)
		return NULL;

	$post_id = (int) $array[4]; // http://blog.roga.tw/2011/02/16/2484

	$wp_result = $wpdb->get_row("SELECT `post_type`, `post_name`, `post_date` FROM `$wpdb->posts` WHERE `ID` = $post_id ");

	if( ! isset($wp_result))
		return NULL;

	$post_type = $wp_result->post_type;
	$post_name = $wp_result->post_name;
	$post_date = $wp_result->post_date;

	if($post_type == 'revision')
		return NULL;

	$time = strtotime($post_date);
	$year = date('Y', $time);
	$month = date('m', $time);
	//  old:   /%year%/%monthnum%/%day%/%post_id%
	//  new:   /%year%/%monthnum%/%postname%/
	$new_request_uri = "/$year/$month/$post_name";
	$http_host = getenv('HTTP_HOST');

	$logfile = WP_CONTENT_DIR . "/cache/wp-roga-redirect.log";
	if(file_exists($logfile))
		file_put_contents($logfile, sprintf("[%s] %s -> %s / %s " . PHP_EOL, date_i18n("Y-m-d H:i:s"), $request_uri, urldecode($new_request_uri), getenv('HTTP_USER_AGENT')), FILE_APPEND);

	header("Status: 301 Moved Permanently");
	header("Location: http:/$http_host$new_request_uri");
	exit();
}

add_action('init', 'roga_wrap');