Xavisys» redirect http://xavisys.com WordPress Plugins and Custom WordPress Development Thu, 15 Jul 2010 17:58:50 +0000 en hourly 1 http://wordpress.org/?v=3.0.1 Cell phone safe redirecting with mod_rewritehttp://xavisys.com/cell-phone-safe-redirecting-with-mod_rewrite/ http://xavisys.com/cell-phone-safe-redirecting-with-mod_rewrite/#comments Thu, 26 Jul 2007 23:45:18 +0000 Aaron D. Campbell http://xavisys.com/cell-phone-safe-redirecting-with-mod_rewrite/ This is an update to Redirecting all ServerAliases to a preferred domain with mod_rewrite. In that article I solved a problem that I was having where I needed to redirect all ServerAlias options to just one domain, preserving the ssl preference. However, we have a lot of users on cell phones. Some of the simple cell phones (like the Motorolla Razr) do NOT like addresses that are missing the www. A simple url like http://mysite.com?u=user&p=password would not work, because it didn’t store the session cookie properly. Adding a www causes the cookies to work, but our ssl certificate is for mysite.com and having the www in that case causes warnings, and I still wanted to redirect our .net and .org TLDs. I ended up deciding that having the www would be ok as long as the user was NOT trying to use SSL. Here is how I did it:

<ifmodule>
RewriteEngine On
RewriteCond %{SERVER_PORT}%{HTTP_HOST}  !^(443|80(www\.)?)?mysite\.com [NC]
RewriteCond %{HTTP_HOST}                ^(www\.)?
RewriteCond %{SERVER_PORT}s%1           ^80s(www\.)?|443((s)(www\.))?$
RewriteRule ^(.*)                       http%3://%1mysite.com/$1 [L,R=301]
</ifmodule>

Again, this is in the .htaccess file. In the end, a user using SSL is always sent to https://mysite.com. Standard connections are redirected to .com, but their www selection is preserved.

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]]> http://xavisys.com/cell-phone-safe-redirecting-with-mod_rewrite/feed/ 1 PHP function to Redirect a user with a messagehttp://xavisys.com/php-function-to-redirect-a-user-with-a-message/ http://xavisys.com/php-function-to-redirect-a-user-with-a-message/#comments Tue, 10 Jul 2007 03:51:19 +0000 Aaron D. Campbell http://xavisys.com/php-function-to-redirect-a-user-with-a-message/ One of the common things that you need to do in PHP is redirect a user, and display a message on whatever page you are sending them to. There are a lot of reasons for this, but the most common is to avoid a user refresh from resubmitting a form. Instead, process the form data, and redirect the user (even if you redirect them to the same page). Here is a function I use for this very purpose. It requires that you are using sessions. It stores the message in the session, and passes a has in the URL. This way, you can use any length message you want, and display it only once.

First, the function:

/**
* This function redirects to a specified page (current page by default), but
* passes along a message in the users SESSION.  It passes a GET var that tells
* where that message is.  Used properly, this will avoid giving the user a
* duplicate message on page refresh.
*
* @param string $message - Message to pass along via session
* @param string[optional] $page - page to redirect to (with leading /)
*/
function redirect($message, $page=FALSE) {
	$my_get = array();
	$_GET['message'] = set_session_message($message);
	foreach ($_GET as $n=&gt;$v) {
		$my_get[] = &quot;{$n}={$v}&quot;;
	}
	if (count($my_get) &gt; 0) {
		$my_get = '?'.implode('&amp;',$my_get);
	} else {
		$my_get = '';
	}

	if (is_string($page)) {
		$location = $page;
	} else {
		$location = $_SERVER['SCRIPT_NAME'];
	}

	$http = (!isset($_SERVER['HTTPS']) || strtolower($_SERVER['HTTPS'])!='on')?'http':'https';

	header(&quot;Location: {$http}://{$_SERVER['HTTP_HOST']}{$location}{$my_get}&quot;);
	exit;
}

/**
 * Set a session message
 *
 * @param string $message Message to set
 *
 * @return string - Message ID which is the $_SESSION index that holds the message
 */
function set_session_message($message) {
	$message_id = sha1(microtime(true));
	$_SESSION[$message_id] = $message;

	return $message_id;
}

Use it like this:

//To redirect to the current page
redirect('Place your message here');
//To go to another page
redirect('Place your message here', '/next_page.php');

Now, you will want to display the message. I use this code in my template file

if (isset($_GET['message']) &amp;&amp; isset($_SESSION[$_GET['message']])) {
	echo $_SESSION[$_GET['message']]&quot;;
	unset($_SESSION[$_GET['message']]);
}

In this way, the message is displayed, but then unset so it’s not displayed again on refresh.

Simple and effective.

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]]> http://xavisys.com/php-function-to-redirect-a-user-with-a-message/feed/ 7 Redirecting all ServerAliases to a preferred domain with mod_rewritehttp://xavisys.com/redirecting-all-serveraliases-to-a-preferred-domain-with-mod_rewrite/ http://xavisys.com/redirecting-all-serveraliases-to-a-preferred-domain-with-mod_rewrite/#comments Sat, 07 Jul 2007 01:35:46 +0000 Aaron D. Campbell http://xavisys.com/redirecting-all-serveraliases-to-a-preferred-domain-with-mod_rewrite/ I had a domain that I owned three TLDs for. I had the .com, the .net, and the .org. These all go to the same site using ServerAlias directives in the apache config. As do the www versions of each. However, I preferred to have them all go to mysite.com with no www. To add to the confusion, the site allows (but does not require) SSL, so the user’s SSL state needed to be preserved during all this rewriting. Here is what I came up with, and it works great.

<ifmodule>
RewriteEngine On
RewriteCond %{HTTP_HOST}    !^mysite\.com [NC]
RewriteCond %{HTTP_HOST}    !=""
RewriteCond %{SERVER_PORT}s ^(80s|443(s))$
RewriteRule ^(.*)          http%2://mysite.com/$1 [L,R=301]
</ifmodule>

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