moodle-block_fale_conosco/block_fale_conosco.php

<?php

class block_fale_conosco extends block_base {
    public function init() {
        $this->title = get_string('fale_conosco', 'block_fale_conosco');
    }

    public function get_content() {
        if ($this->content !== null) {
          return $this->content;
        }

        $this->content         =  new stdClass;
        $this->content->text   = 'The content of our SimpleHTML block!';
        $this->content->footer = 'Footer here...';

        return $this->content;
    }
}