$ano     = trim(sanitize_text_field($_POST['ano'] ?? ''));
        $doi     = trim(sanitize_text_field($_POST['doi'] ?? ''));
        $page    = max(1, intval($_POST['page'] ?? 1));
        $per     = max(1, min(50, intval($_POST['per'] ?? 10)));
        $off     = ($page - 1) * $per;

        $w = array();
        $p = array();

        if ($q !== '') {
            $like = '%' . $wpdb->esc_like($q) . '%';
            $w[]  = '(titulo LIKE %s OR autores LIKE %s)';
            $p[]  = $like;
            $p[]  = $like;
        }
        if ($issn !== '') {
            $w[] = 'issn = %s';
            $p[] = $issn;
        }
        if ($revista !== '') {
            $w[] = 'revista LIKE %s';
            $p[] = '%' . $wpdb->esc_like($revista) . '%';
        }
        if ($ano !== '') {
            $w[] = 'ano = %d';
            $p[] = (int)$ano;
        }
        if ($doi !== '') {
            $w[] = 'doi LIKE %s';
            $p[] = '%' . $wpdb->esc_like($doi) . '%';
        }

        $where = $w ? ('WHERE ' . implode(' AND ', $w)) : '';

        $count_sql = "SELECT COUNT(*) FROM {$this->tb_artigos} {$where}";
        $count = $p
            ? (int)$wpdb->get_var($wpdb->prepare($count_sql, $p))
            : (int)$wpdb->get_var($count_sql);

        $pages = max(1, (int)ceil($count / $per));

        $sql = "SELECT id,titulo,autores,doi,revista,issn,ano,volume,numero,paginas,pdf,created_at,link
                FROM {$this->tb_artigos} {$where}
                ORDER BY created_at DESC, id DESC
                LIMIT %d OFFSET %d";

        $p2   = $p;
        $p2[] = $per;
        $p2[] = $off;

        $rows = $wpdb->get_results($wpdb->prepare($sql, $p2), ARRAY_A);

        $html  = '<table class="arauto-table"><thead><tr>';
        $html .= '<th>ID</th>';
        $html .= '<th>Título</th>';
        $html .= '<th>Autores</th>';
        $html .= '<th>DOI</th>';
        $html .= '<th>Revista</th>';
        $html .= '<th>ISSN</th>';
        $html .= '<th>Ano</th>';
        $html .= '<th>Vol.</th>';
        $html .= '<th>Núm.</th>';
        $html .= '<th>Páginas</th>';
        $html .= '<th>PDF</th>';
        $html .= '<th>Criado</th>';
        $html .= '</tr></thead><tbody>';

        if (empty($rows)) {
            $html .= '<tr><td colspan="12">(nenhum resultado)</td></tr>';
        } else {
            foreach ($rows as $r) {
                $titulo = esc_html($r['titulo']);
                if (!empty($r['link'])) {
                    $titulo = '<a href="' . esc_url($r['link']) . '" target="_blank" rel="noopener noreferrer">' . $titulo . '</a>';
                }

                $doi_val = trim($r['doi']);
                if ($doi_val !== '') {
                    $doi_url  = (strpos($doi_val, 'http') === 0) ? $doi_val : 'https://doi.org/' . $doi_val;
                    $doi_html = '<a href="' . esc_url($doi_url) . '" target="_blank" rel="noopener noreferrer">' . esc_html($doi_val) . '</a>';
                } else {
                    $doi_html = '';
                }

                $autores = esc_html(wp_html_excerpt($r['autores'], 80, '…'));

                $pdf_html = '';
                if (!empty($r['pdf'])) {
                    $pdf_html = '<a href="' . esc_url($r['pdf']) . '" target="_blank" rel="noopener noreferrer">PDF</a>';
                }

                $html .= '<tr>'
                    . '<td>' . intval($r['id']) . '</td>'
                    . '<td>' . $titulo . '</td>'
                    . '<td>' . $autores . '</td>'
                    . '<td>' . $doi_html . '</td>'
                    . '<td>' . esc_html($r['revista']) . '</td>'
                    . '<td>' . esc_html($r['issn']) . '</td>'
                    . '<td>' . esc_html($r['ano']) . '</td>'
                    . '<td>' . esc_html($r['volume']) . '</td>'
                    . '<td>' . esc_html($r['numero']) . '</td>'
                    . '<td>' . esc_html($r['paginas']) . '</td>'
                    . '<td>' . $pdf_html . '</td>'
                    . '<td>' . esc_html($r['created_at']) . '</td>'
                    . '</tr>';
            }
        }

        $html .= '</tbody></table>';

        wp_send_json_success(array(
            'html'  => $html,
            'count' => $count,
            'pages' => $pages,
        ));
    }
}

}

new Arauto_Public_300();


<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="https://arautoindex.com/wp-sitemap-index.xsl" ?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"><sitemap><loc>https://arautoindex.com/wp-sitemap-posts-post-1.xml</loc></sitemap><sitemap><loc>https://arautoindex.com/wp-sitemap-posts-page-1.xml</loc></sitemap><sitemap><loc>https://arautoindex.com/wp-sitemap-taxonomies-category-1.xml</loc></sitemap><sitemap><loc>https://arautoindex.com/wp-sitemap-users-1.xml</loc></sitemap></sitemapindex>