Hide Seraphinite Accelerator Banner (WordPress MU-Plugin)

hide_seraphinite_accelerator_banner.md

Hide the “Optimized by Seraphinite Accelerator” badge in Wordprress. The snippet does two things:

1. Replies f to the plugin’s ?seraph_accel_gbnr probe so the badge removes itself.
2. As a fallback, strips any remaining banner markup from the final HTML.

Easiest way: MU-plugin (loads automatically)

1. Create the folder if it doesn’t exist:

wp-content/mu-plugins/

2. Create the file:

wp-content/mu-plugins/hide-seraphinite-banner.php

3. Paste this code and save:

<?php
/**
 * Plugin Name: Hide Seraphinite Accelerator Banner
 * Description: Oculta el “Optimized by Seraphinite Accelerator”.
 */

// Responde al probe (?seraph_accel_gbnr) para que el propio script elimine el banner
add_action('init', function () {
    if (isset($_GET['seraph_accel_gbnr'])) {
        header('Content-Type: text/plain; charset=utf-8');
        header('Cache-Control: no-store, max-age=0');
        echo 'f';
        exit;
    }
}, 0);

// Plan B: si igual aparece en el HTML final, lo borramos
add_filter('seraph_accel_content', function ($html) {
    $html = preg_replace('~<a[^>]*>(?:\s*<img[^>]*>)?\s*<span[^>]*>\s*Optimized by Seraphinite Accelerator\b.*?</a>~is', '', $html);
    $html = preg_replace('~<script[^>]*seraph-accel-crit="1"[^>]*>.*?\?seraph_accel_gbnr.*?</script>~is', '', $html);
    return $html;
}, 9999);

4. Clear caches (plugin/server/CDN).
5. Quick test: open https://your-domain/?seraph_accel_gbnr — it should print f.