tec-remove-headers.php

<?php

declare(strict_types=1);

/**
 * Remove global headers added by The Events Calendar.
 * @wordpress-muplugin
 * Plugin Name: TEC Remove Headers
 * Description: Remove global headers added by The Events Calendar.
 * Version: 1.0.0
 * Author: Austin Passy
 * Author URI: https://github.com/thefrosty
 * phpcs:disable
 */

if (!is_blog_installed()) {
    return;
}

add_action('template_redirect', static function(): void {
    if (!function_exists('\tribe')) {
        return;
    }
    /** @var Tribe__REST__Headers__Headers_Interface $headers */
    $headers = tribe('tec.rest-v1.headers');
    if (!wp_is_serving_rest_request() && is_object($headers) && method_exists($headers, 'send_header')) {
        remove_action('template_redirect', [$headers, 'send_header'], 11);
    }
});