choose_primary_blog()

function choose_primary_blog() {
	?>
	<table class="form-table">
	<tr>
	<?php /* translators: My sites label */ ?>
		<th scope="row"><label for="primary_blog"><?php _e( 'Primary Site' ); ?></label></th>
		<td>
		<?php
		$all_blogs = get_blogs_of_user( get_current_user_id() );
		$primary_blog = get_user_meta( get_current_user_id(), 'primary_blog', true );
		if ( count( $all_blogs ) > 1 ) {
			$found = false;
			?>
			<select name="primary_blog" id="primary_blog">
				<?php foreach ( (array) $all_blogs as $blog ) {
					if ( $primary_blog == $blog->userblog_id )
						$found = true;
					?><option value="<?php echo $blog->userblog_id ?>"<?php selected( $primary_blog, $blog->userblog_id ); ?>><?php echo esc_url( get_home_url( $blog->userblog_id ) ) ?></option><?php
				} ?>
			</select>
			<?php
			if ( !$found ) {
				$blog = reset( $all_blogs );
				update_user_meta( get_current_user_id(), 'primary_blog', $blog->userblog_id );
			}
		} elseif ( count( $all_blogs ) == 1 ) {
			$blog = reset( $all_blogs );
			echo esc_url( get_home_url( $blog->userblog_id ) );
			if ( $primary_blog != $blog->userblog_id ) // Set the primary blog again if it's out of sync with blog list.
				update_user_meta( get_current_user_id(), 'primary_blog', $blog->userblog_id );
		} else {
			echo "N/A";
		}
		?>
		</td>
	</tr>
	</table>
	<?php
}