Thread: Add selected user role on signup to all blogs in multisite network

/**
 * ADD ROLE TO ALL BLOGS - START
 */

// hook to user register
add_filter( 'user_register', 'jr_user_register_role_all_blogs');

// Add selected role to all blogs
function jr_user_register_role_all_blogs( $user_id ) {

	global $posted;

	foreach( jr_msum_get_blog_list( 0, 'all' ) as $key => $blog ) { 

		if( is_user_member_of_blog( $user_id, $blog[ 'blog_id' ] ) )
			continue;

		switch_to_blog( $blog[ 'blog_id' ] );

		if ( !empty( $posted['role'] ) )
			add_user_to_blog( $blog[ 'blog_id' ], $user_id, $posted['role'] );
		else
			add_user_to_blog( $blog[ 'blog_id' ], $user_id, 'job_lister' );

		restore_current_blog();
	}
	update_user_meta( $user_id, 'msum_has_caps', 'true' );
}

/**
 * Based on the deprecated WPMU get_blog_list function. 
 * 
 * Except this function gets all blogs, even if they are marked as mature and private.
 */
function jr_msum_get_blog_list( $start = 0, $num = 10 ) {
	global $wpdb;

	$blogs = $wpdb->get_results( $wpdb->prepare( "SELECT blog_id, domain, path FROM $wpdb->blogs WHERE site_id = %d AND archived = '0' AND spam = '0' AND deleted = '0' ORDER BY registered DESC", $wpdb->siteid ), ARRAY_A );

	foreach ( (array) $blogs as $details ) {
		$blog_list[ $details[ 'blog_id' ] ] = $details;
		$blog_list[ $details[ 'blog_id' ] ]['postcount'] = $wpdb->get_var( "SELECT COUNT(ID) FROM " . $wpdb->get_blog_prefix( $details['blog_id'] ). "posts WHERE post_status='publish' AND post_type='post'" );
	}
	unset( $blogs );
	$blogs = $blog_list;

	if ( false == is_array( $blogs ) )
		return array();

	if ( $num == 'all' )
		return array_slice( $blogs, $start, count( $blogs ) );
	else
		return array_slice( $blogs, $start, $num );
}


/**
 * ADD ROLE TO ALL BLOGS - END
 */