functions.php twentytwelvechild

<?php
function twentytwelvechild_custom_excerpt_length( $length ) {
    return 100;
}
add_filter( 'excerpt_length', 'twentytwelvechild_custom_excerpt_length', 100 );

function twentytwelvechild_new_excerpt_more($more) {
       global $post;
    return ' <a href="'. get_permalink($post->ID) . '">Read the Rest...</a>';
}
add_filter('excerpt_more', 'twentytwelvechild_new_excerpt_more');

?>