WordPress MU

OK. After searching around for nothing and stick around with those lazy coder who don't bother to look inside the code or those who dont want to share the trick.

After a while reading the WP-SIGNUP.PHP I found out that it's supper easy to limit ONE user ONE blog...

The reason why i CAPITALIZE the word ONE because the thing that i modify is juz simply not let anyone with a blog account register anymore...

And here we go...
-------------------------------------
Go to WP-Signup.php

search for:

if ( is_user_logged_in() && ( $active_signup == 'all' || $active_signup == 'blog' ) ) {
signup_another_blog($newblogname);

replace

signup_another_blog($newblogname);

with:

if ( ! empty($blogscheck) ) {
			signup_another_blog($newblogname);
		}
		else
		{
		echo "<h2>Sorry!</h2><p>Sorry, but you only allow to create 1 blog for your account</p><p><a href='http://www.animomo.net/'>Back to homepage</a></p>";
		}

-----------------------------------

That's all!

Isnt it easy. I hope someone can give me feed back about this.

Try it at http://www.animomo.net/

Final Edit: Work for Admin, fix bugs...

Replace with these instead:

$blogscheck = get_blogs_of_user($current_user->ID);
		$blogarrayvalue = (get_object_vars($blogscheck[1]));
		$blogsiteURL = "http://animomo.net";
		if ($blogarrayvalue[siteurl] == $blogsiteURL) {
			signup_another_blog($newblogname);
		}
		else
		{
		echo "<h2>Sorry!</h2><p>Sorry, but you only allow to create 1 blog for your account</p><p><a href='http://www.animomo.net/'>Back to homepage</a></p>";
		}

Thanks so much!

nevermind

The first version worked fine for me.... The second version gave me a blank page... Thanks for the hard work!

Alternative to editing a core file exist. A plugin can be made with code from wpmu-functions.php:

http://mu.wordpress.org/forums/topic.php?id=4064&page&replies=14

I alread try the below code :

'Go to WP-Signup.php

search for:

if ( is_user_logged_in() && ( $active_signup == 'all' || $active_signup == 'blog' ) ) {
signup_another_blog($newblogname);replace

signup_another_blog($newblogname);

with:

if ( ! empty($blogscheck) ) {
signup_another_blog($newblogname);
}
else
{
echo "<h2>Sorry!</h2><p>Sorry, but you only allow to create 1 blog for your account</p><p>Back to homepage</p>";
}-----------------------------------

'

But finally, it made the user even cannot create the first blog (0 blog)...

For your information, I set my website as:
visitor must
1) firstly, register as user (get the login id)
2) then login
3) create a blog
(my website don't want visitors to create blog directly, must register a login, first)

but after I add the above code.
when doing the step 3), system told the user "but you only allow to create 1 blog"!!
Also that user control panel was linkded to admin's (my control panel), but sure, that user have no authoririty to change things..

Do you think,
If I set 2 blogs per user can solve the problem,
if so, how to set?

or I missed somthing?

well, you may have a look at my plugin i recently created.It will add an option to SiteAdmin->options page ,where you can limit number of blogs per user.
Here is the code ,which does it.
'<?php
add_filter("wpmu_active_signup","tiw_check_current_users_blog"); //send fake/true enable or disabled request
add_action("wpmu_options","tiw_display_options_form"); //show the form to allow how many number of blogs per user
add_action("update_wpmu_options","tiw_save_num_allowed_blogs");//action to save number of allowed blogs per user

/****Check ,whether blog registration is allowed,and how many blogs per logged in user is allowed */

function tiw_check_current_users_blog($active_signup)
{
if( !is_user_logged_in() )
return $active_signup;//if the user is not logged in,do not change the site policies

//otherwise...
global $current_user;
$blogs=get_blogs_of_user($current_user->ID);//get all blogs of user

$number_of_blogs_per_user=tiw_num_allowed_blogs();//find

//if number of allowed blog is greater than 0 and current user owns less number of blogs */
if($number_of_blogs_per_user>0&&count($blogs)<$number_of_blogs_per_user)
return $active_signup;
else
return "none";
}

/****How many blogs are allowed per user *************/

function tiw_num_allowed_blogs()
{
$num_allowed_blog=get_site_option("tiw_allowed_blogs_per_user");//find how many blogs are allowed
if(!isset($num_allowed_blog))
$num_allowed_blog=0;

return $num_allowed_blog;//return the number of allowed blogs
}

/*****Show the Number of Blogs to restrict per user at the bottom of Site options ****/
function tiw_display_options_form()
{
?>
<h3><?php _e('Limit Blog Registrations Per User') ?></h3>
<table>
<tbody>
<tr valign="top">
<th scope="row">Number of blogs allowed per User</th>
<td>
<input type="text" name="num_allowed_blogs" value="<?php echo tiw_num_allowed_blogs()?>" />
<p>If the Value is Zero,It indicates any number of blog is allowed</p>
</td>
</tr>
</tbody>
</table>
<?php
}

/**************Save the Number of blogs per user when the form is updated **************/
function tiw_save_num_allowed_blogs()
{
$allowed_number_of_blogs=intval($_POST["num_allowed_blogs"]);//how many blogs the user has set
//save to the database
update_site_option("tiw_allowed_blogs_per_user",$allowed_number_of_blogs);//now update

}
?>'
or if you wish to have the plugin you may have a look here http://www.thinkinginwordpress.com/2009/03/limit-number-of-blogs-per-user-for-wordpress-mu-and-buddypress-websiteblog-network/
Sorry,admins,if you think,linking my page is against rules, please remove that,as I have already posted the code here.

regards
Brajesh