wordpress-settings.php

<?php
/**
* Plugin Name: Settings
* Plugin URI: http://
* Description: Plugin that adds default settings to our Wordpress websites.
* Version: 1.0.0
* Author: PICUS
* Author URI: https://picuscreative.com
*/

/*
Remove default scripts from header and add them to footer (functions.php)
*/
remove_action('wp_head', 'print_emoji_detection_script', 7);
remove_action('wp_print_styles', 'print_emoji_styles');
remove_action('admin_print_scripts', 'print_emoji_detection_script');
remove_action('admin_print_styles', 'print_emoji_styles');

function remove_head_scripts() {
  remove_action('wp_head', 'wp_print_scripts');
  remove_action('wp_head', 'wp_print_head_scripts', 9);
  remove_action('wp_head', 'wp_enqueue_scripts', 1);

  add_action('wp_footer', 'wp_print_scripts', 5);
  add_action('wp_footer', 'wp_enqueue_scripts', 5);
  add_action('wp_footer', 'wp_print_head_scripts', 5);
}
add_action( 'wp_enqueue_scripts', 'remove_head_scripts' );

/*
Create "Client" role and function to check if user is an "admin" (functions.php)
*/
add_role('client', __( 'Client' ), array(
  'read'                  => true,
  'edit_pages'            => true,
  'edit_others_pages'     => true,
  'edit_private_pages'    => true,
  'edit_published_pages'  => true,
));

/*
Remove admin menus
*/
function remove_admin_menus() {
  if(!is_admin()) {
    remove_menu_page( 'tools.php' );
    remove_menu_page( 'index.php' );
    remove_menu_page( 'edit-comments.php' );
    remove_menu_page( 'edit.php' );
    remove_menu_page( 'index.php' );
    remove_submenu_page( 'upload.php', 'wp-smush-bulk' );
    remove_meta_box('pageparentdiv', 'page', 'normal');
  }
}
add_action( 'admin_menu', 'remove_admin_menus' );

/*
Remove admin bar menus
*/
function remove_admin_bar_menus() {
  if(!is_admin()) {
    global $wp_admin_bar;
    $wp_admin_bar->remove_node('wp-logo');
    $wp_admin_bar->remove_menu('comments');
    $wp_admin_bar->remove_menu('new-content');
    $wp_admin_bar->remove_menu('wpseo-menu');
  }
}
add_action( 'wp_before_admin_bar_render', 'remove_admin_bar_menus' );

/*
Remove versions from admin menu
*/
function change_footer_admin () {
  if(!is_admin()) {
    return ' ';
  }
}
add_filter('admin_footer_text', 'change_footer_admin', 9999);

function change_footer_version() {
  if(!is_admin()) {
    return ' ';
  }
}
add_filter( 'update_footer', 'change_footer_version', 9999);

/*
Remove notices from admin menu
*/
function remove_notices()
{
  if(!is_admin()) { ?>
    <style type="text/css">
      .notice,
      .update-nag,
      h2.hndle.ui-sortable-handle {
        display: none !important;
      }
    </style>
  <?php }
}
add_action('admin_head', 'remove_notices');

/*
Add logo in login page
*/
function login_logo() { ?>
  <style type="text/css">
    body.login div#login h1 a {
      display: none !important;
    }
  </style>

  <script type="application/javascript">
    document.addEventListener("DOMContentLoaded", function(event) {
      var loginElement = document.getElementsByTagName("h1")[0];
      var img = document.createElement("img");
      img.setAttribute("src", "<?php echo home_url() ?>/wp-content/themes/picus/dist/images/logo.svg");
      loginElement.appendChild(img);
    });
  </script>
<?php }
add_action( 'login_enqueue_scripts', 'login_logo' );


/**
 * Responsive Image Helper Function
 *
 * @param string $image_id the id of the image (from ACF or similar)
 * @param string $image_size the size of the thumbnail image or custom image size
 * @param string $max_width the max width this image will be shown to build the sizes attribute
 */

function acf_responsive_image($image_id, $image_size, $max_width){

  // check the image ID is not blank
  if($image_id != '') {

    // set the default src image size
    $image_src = wp_get_attachment_image_url( $image_id, $image_size );

    // set the srcset with various image sizes
    $image_srcset = wp_get_attachment_image_srcset( $image_id, $image_size );

    // generate the markup for the responsive image
    echo 'src="'.$image_src.'" srcset="'.$image_srcset.'" sizes="(max-width: '.$max_width.'px) 100vw, '.$max_width.'px"';

  }
}

/*
Defer script loading so that there is non-blocking javascript
*/
if (!is_admin()) {
  add_filter( 'script_loader_tag', function ( $tag, $handle ) {
    return str_replace( ' src', ' defer src', $tag );
  }, 10, 2 );
}

/*
Filter to Remove JS and CSS versioning loading to enable proxy server caching
*/

function remove_version_param_from_style_and_script( $style_or_js_url ) {
  if ( strpos($style_or_js_url, 'ver=' ) ) {
    $style_or_js_url = remove_query_arg( 'ver', $style_or_js_url );
  }
  return $style_or_js_url;
}

add_filter( 'style_loader_src', 'remove_version_param_from_style_and_script', 10 );