Two versions of a script that disables plugins except specific pages

active-plugins.php

<?php
/**
 * @package active-plugins
 * @version 1.0
 *
 * Plugin Name: Active Plugins
 * Plugin URI: http://wordpress.org/extend/plugins/#
 * Description: This is a development plugin 
 * Author: Carlo Daniele
 * Version: 1.0
 * Author URI: https://carlodaniele.it/
 */

// This is a working version - Works with a single page ($is_contact_page)
// Place this file in /wp-content/mu-plugins/active-plugins.php

$request_uri = parse_url( $_SERVER['REQUEST_URI'], PHP_URL_PATH );
$is_admin = strpos( $request_uri, '/wp-admin/' );
if( false === $is_admin ){
  // filter active plugins
  add_filter( 'option_active_plugins', function( $plugins ){
    global $request_uri;
    
    $is_contact_page = strpos( $request_uri, '/contact-us/' );
    

    // Plugins to disable later
    $myplugins = array( 
      "contact-form-7/wp-contact-form-7.php", 
      "contact-form-arkenea/contact_form_arkenea.php"
    );

    if( false === $is_contact_page ){
      $plugins = array_diff( $plugins, $myplugins );
    }

    return $plugins;
  } );
}

active-plugins_not-working.php

<?php
/**
 * @package active-plugins
 * @version 1.0
 *
 * Plugin Name: Active Plugins
 * Plugin URI: http://wordpress.org/extend/plugins/#
 * Description: This is a development plugin 
 * Author: Carlo Daniele
 * Version: 1.0
 * Author URI: https://carlodaniele.it/
 */


// This is NOT a working version - I'd like to add more pages than just /contact-us
// Place this file in /wp-content/mu-plugins/active-plugins.php

$request_uri = parse_url( $_SERVER['REQUEST_URI'], PHP_URL_PATH );
$is_admin = strpos( $request_uri, '/wp-admin/' );
if( false === $is_admin ){
  // filter active plugins
  add_filter( 'option_active_plugins', function( $plugins ){
    global $request_uri;    

    // Plugins to disable later
    $myplugins = array( 
      "contact-form-7/wp-contact-form-7.php", 
      "contact-form-arkenea/contact_form_arkenea.php"
    );

    // Pages I'd like to keep $myplugins enabled
    $pages = array(
      '/web-app-development/',
      '/ui-ux-design-agency/',
      '/healthcare-software-development/',
      '/roadmapping/',
      '/contact-us/',
    );

    foreach ($pages as $page) {
      if( false === strpos( $request_uri, $page ) ) {  
        $plugins = array_diff( $plugins, $myplugins );
        
      } else {
        $containsPlugins = count(array_intersect($myplugins, $plugins)) == count($myplugins);
        if ( !$containsPlugins ) {
          array_push($myplugins, $plugins);
        }
        
        return $plugins;
      }
    }


    return $plugins;
  } );
}