For long time I used some plugins like wp-pagenavi to make pagination for WordPress b/c I just knew that function that display “older posts” and “Newer posts” wich is not very interative and I never like it. Browsing by the Codex I found a very simple,easy and short function that I make me feel like a stupid b/c I used a plugin to make it.

You can see the function below:

<?php wp_link_pages( $args ); ?>

Easy uh?! The parameters is also very easy to understand and change.

See below the parameters default:

<?php $args = array(
    'before'           => '<p>' . __('Pages:'),
    'after'            => '</p>',
    'link_before'      => , 'link_after' => ,
    'next_or_number'   => 'number',
    'nextpagelink'     => __('Next page'),
    'previouspagelink' => __('Previous page'),
    'pagelink'         => '%',
    'more_file'        => , 'echo' => 1 ); ?> 

Source:

http://codex.wordpress.org/Function_Reference/wp_link_pages