Example WordPress shortcode creation

shortcodes.php

<?php
# BUTTONS
function sc_btn_default($atts, $content = null){
    return '<a href="'.$atts['link'].'" class="button">'.do_shortcode($content).'</a>';
}
add_shortcode('button', 'sc_btn_default');
function sc_btn_primary($atts, $content = null){
    return '<a href="'.$atts['link'].'" class="button">'.do_shortcode($content).'</a>';
}
add_shortcode('button_primary', 'sc_btn_default');
function sc_btn_secondary($atts, $content = null){
    return '<a href="'.$atts['link'].'" class="button">'.do_shortcode($content).'</a>';
}
add_shortcode('button_secondary', 'sc_btn_default');

# ROWS
function sc_row_open($atts, $content = null){
    return '<div class="row">';
}
add_shortcode('row_open', 'sc_row_open');
function sc_row_close($atts, $content = null){
    return '</div>';
}
add_shortcode('row_close', 'sc_row_close');

# COLUMNS
function sc_column_full($atts, $content = null){
    return '<div class="column">'.do_shortcode($content).'</div>';
}
add_shortcode('column', 'sc_column_full');
function sc_column_quarter($atts, $content = null){
    return '<div class="column one-quarter">'.do_shortcode($content).'</div>';
}
add_shortcode('column_quarter', 'sc_column_quarter');
function sc_column_half($atts, $content = null){
    return '<div class="column one-half">'.do_shortcode($content).'</div>';
}
add_shortcode('column_half', 'sc_column_half');
function sc_column_third($atts, $content = null){
    return '<div class="column one-third">'.do_shortcode($content).'</div>';
}
add_shortcode('column_third', 'sc_column_third');