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// Shortcode de botões
class short_botao {
    function shortcode($atts, $content = null)
    {
        extract(shortcode_atts(array(
            'classe' => '',
            'id' => '',
            'link' => '#'
        ), $atts));

        
        return
            "
                <a class='button $classe' id='$id' href='$link'>$content</a>

            "
            ;
    }
}

add_shortcode('botao', array('short_botao', 'shortcode'));