functions.php

<?php
/*
 * 1. View Full Article
 *
 * This function produces a link to view the full article.
 *
 * @example <code>[view_full_article]</code> is the default usage
 */
 
 
if ( ! function_exists( 'woo_shortcode_view_full_article' ) ) {
function woo_shortcode_view_full_article ( $atts ) {
    $defaults = array(
        'label' => __( 'Continue Reading', 'woothemes' ),
        'before' => '',
        'after' => ''
    );
    $atts = shortcode_atts( $defaults, $atts );
 
    $atts = array_map( 'wp_kses_post', $atts );
     
    $atts['label'] = 'Read more';
     
 
 
    $output = sprintf( '<span class="read-more">%1$s<a href="%3$s" title="%4$s">%4$s</a>%2$s</span> ', $atts['before'], $atts['after'], get_permalink( get_the_ID() ), $atts['label'] );
    return apply_filters( 'woo_shortcode_view_full_article', $output, $atts );
} // End woo_shortcode_view_full_article()
}
 
add_shortcode( 'view_full_article', 'woo_shortcode_view_full_article' );

?>

link_into_button.php

$output = sprintf( '%1$s<a href="%3$s" title="%4$s"><span class="woo-sc-button  custom read-more">%4$s</span> </a>%2$s', $atts['before'], $atts['after'], get_permalink( get_the_ID() ), $atts['label'] );

view_full_article.php

[view_full_article label="Read more"]