WordPress: Excerpt helpers

excerpts.php

function dt_custom_excerpt_length($length)
{
    global $post;

    if ($post->post_type == 'post') {
        return 18; // words
    }
}
// add_filter( 'excerpt_length', 'dt_custom_excerpt_length', 999 );


function dt_custom_excerpt_more($more)
{
    global $post;

    if ($post->post_type == 'post') {
        return '...';
    }
}
// add_filter( 'excerpt_more', 'dt_custom_excerpt_more' );