fix plugin - Link Juice Optimizer

lj-optimizer.php

<?php
/*
Plugin Name: Link Juice Optimizer
Plugin URI: https://www.fedegomez.es
Description: Replace the links with a clickable &lt;span&gt; tag to optimize the link juice.
Version: 2.0
Author: Fede Gómez
Author URI: https://www.fedegomez.es
License: GPL3
 */

add_filter('walker_nav_menu_start_el', 'link_juice_optimizer_menu_item', 10, 4);
function link_juice_optimizer_menu_item($item_output, $item, $depth, $args)
{
    if (in_array('ljoptimizer', $item->classes)) {
        preg_match('/<a\s+(?:[^"\'>]+|"[^"]*"|\'[^\']*\')*href="([^"]+)"|\'[^\']+\'|[^<>\s]+/i', $item_output, $matches, PREG_OFFSET_CAPTURE);
        $href = $matches[1][0];
        $item_output = str_replace('<a', '<span', $item_output);
        $item_output = str_replace($href, base64url_encode($href), $item_output);
        $item_output = str_replace('href', 'data-loc', $item_output);
        $item_output = str_replace('target', 'data-window', $item_output);
        $item_output = str_replace('_blank', 'new', $item_output);
        $item_output = str_replace('</a>', '</span>', $item_output);
    }
    return $item_output;
}

add_filter('the_content', 'link_juice_optimizer');
add_filter('widget_text', 'link_juice_optimizer');
function link_juice_optimizer($content)
{
    $enlacesOriginales = [];
    $enlacesReemplazo = [];

    preg_match_all('~(?:\<a.*ljoptimizer.*\>.*\<\/a\>)~iU', $content, $matches);

    foreach ($matches[0] as $clave => $valor) {
        $inicio = strrpos($valor, "<a");
        $final = strrpos($valor, "</a>");
        $a = substr($valor, $inicio, ($final - $inicio) + 4);
        $xml = new SimpleXMLElement($a);
        $enlacesOriginales[] = $a;

        // fix miquel
        // con este cambio no se pierden otros class usados, ni etiquetas html dentro de los enlaces como por ejemplo img o span

        //$enlacesReemplazo[] = '<span class="ljoptimizer" data-loc="' . base64url_encode($xml['href']) . '" data-window="' . $target . '">' . $xml[0] . '</span>';

        $href = $xml['href'];
        $item_output = $a;
        $item_output = str_replace('<a', '<span', $item_output);
        $item_output = str_replace($href, base64url_encode($href), $item_output);
        $item_output = str_replace('href', 'data-loc', $item_output);
        $item_output = str_replace('target', 'data-window', $item_output);
        $item_output = str_replace('_blank', 'new', $item_output);
        $item_output = str_replace('</a>', '</span>', $item_output);

        $enlacesReemplazo[] = $item_output;

    }

    foreach ($enlacesOriginales as $clave => $valor) {
        $content = str_replace($valor, $enlacesReemplazo[$clave], $content);
    }

    return $content;
}

add_filter('dynamic_sidebar_params', 'capture_sidebar', 10, 1);
function capture_sidebar($params)
{
    if (is_admin()) {
        return $params;
    }
    global $wp_registered_widgets;
    $current_widget_id = $params[0]['widget_id'];
    if (substr($current_widget_id, 0, 5) == 'text-' || substr($current_widget_id, 0, 12) == 'custom_html-') {
        return $params;
    }
    $wp_registered_widgets[$current_widget_id]['original_callback'] = $wp_registered_widgets[$current_widget_id]['callback'];
    $wp_registered_widgets[$current_widget_id]['callback'] = 'capture_widget';
    return $params;
}

function capture_widget()
{
    global $wp_registered_widgets;
    $original_callback_params = func_get_args();
    $widget_id = $original_callback_params[0]['widget_id'];
    $original_callback = $wp_registered_widgets[$widget_id]['original_callback'];
    $wp_registered_widgets[$widget_id]['callback'] = $original_callback;
    $widget_id_base = $original_callback[0]->id_base;
    $sidebar_id = $original_callback_params[0]['id'];
    if (is_callable($original_callback)) {
        ob_start();
        call_user_func_array($original_callback, $original_callback_params);
        $widget_content = ob_get_clean();
        $widget_content = link_juice_optimizer($widget_content);
        echo $widget_content;
    }
}

function base64url_encode($data)
{
    return rtrim(strtr(base64_encode($data), '+/', '-_'), '=');
}

add_action('wp_enqueue_scripts', 'enqueue_ljo_helpers');
function enqueue_ljo_helpers()
{
    wp_enqueue_script('ljoptimizer', plugins_url('ljo_helpers.js', __FILE__), array('jquery'), 1.0, true);
}