functions.php

<?php
#
# INSERIR AD DEPOIS DO QUINTO PARAGRAFO (SE HOUVER)
#
function nm_ad_content($content)
{
    if ( has_tag('noads') || !is_single() )
    {
        return $content;
    }
    $content = explode("</p>", $content);
    $new_content = '';
    $numParagrafos = count($content);
    $aCadaXparagrafos = 5; //Enter number of paragraphs to display ad after.
    for ($i = 0; $i < $numParagrafos; $i++) {
        if ($i % $aCadaXparagrafos == 0 && $i != 0) {
            ob_start();
            if ( is_amp_endpoint() )
            {
                get_template_part('templates/ads-ezoic-middle');
            }
            else
            {
                //get_template_part('template-parts/ads-middle-ezoic');
            }
            $new_content.= ob_get_contents();
            ob_end_clean();
        }

        $new_content.= $content[$i] . "</p>";
    }

    return $new_content;
}
add_filter('the_content', 'nm_ad_content');