My base functions extras for any WordPress themes that I develop

base-wp-functions.php

<?php
/**
 * Logitud de the_excerpt() a 25 palabras
 */
function ramasilveyra_custom_excerpt_length( $length ) {
  return 25;
}
add_filter( 'excerpt_length', 'ramasilveyra_custom_excerpt_length', 999 );

/**
 * Remueve […] de the_excerpt()
 */
function ramasilveyra_new_excerpt_more( $more ) {
   return '...';
}
add_filter('excerpt_more', 'ramasilveyra_new_excerpt_more');

/**
 * Remueve etiquetas innecesarias de wp_head()
 */
remove_action( 'wp_head', 'rsd_link' );
remove_action( 'wp_head', 'wlwmanifest_link' );
remove_action( 'wp_head', 'wp_generator' );

/**
 * Remueve widgets por defecto
 */
function ramasilveyra_unregister_default_wp_widgets() {
  unregister_widget( 'WP_Widget_Pages' );
  unregister_widget( 'WP_Widget_Calendar' );
  unregister_widget( 'WP_Widget_Archives' );
  unregister_widget( 'WP_Widget_Links' );
  unregister_widget( 'WP_Widget_Meta' );
  unregister_widget( 'WP_Widget_Search' );
  unregister_widget( 'WP_Widget_Text' );
  unregister_widget( 'WP_Widget_Categories' );
  unregister_widget( 'WP_Widget_Recent_Posts' );
  unregister_widget( 'WP_Widget_Recent_Comments' );
  unregister_widget( 'WP_Widget_RSS' );
  unregister_widget( 'WP_Widget_Tag_Cloud' );
}
add_action( 'widgets_init', 'ramasilveyra_unregister_default_wp_widgets', 1 );

/**
 * Remueve widgets innecesarios de la pagina inicial del panel
 */
function ramasilveyra_remove_dashboard_widgets() {
  global $wp_meta_boxes;

  unset( $wp_meta_boxes['dashboard']['normal']['core']['dashboard_incoming_links'] );
  unset( $wp_meta_boxes['dashboard']['normal']['core']['dashboard_right_now'] );
  unset( $wp_meta_boxes['dashboard']['normal']['core']['dashboard_plugins'] );
  unset( $wp_meta_boxes['dashboard']['normal']['core']['dashboard_recent_drafts'] );
  unset( $wp_meta_boxes['dashboard']['normal']['core']['dashboard_recent_comments'] );
  unset( $wp_meta_boxes['dashboard']['side']['core']['dashboard_primary'] );
  unset( $wp_meta_boxes['dashboard']['side']['core']['dashboard_secondary'] );
}
add_action( 'wp_dashboard_setup', 'ramasilveyra_remove_dashboard_widgets' );
remove_action( 'welcome_panel', 'wp_welcome_panel' );


/**
 * Remover botones de la barra superior de administracion
 */
function ramasilveyra_remove_admin_bar_links() {
  global $wp_admin_bar;

  $wp_admin_bar->remove_menu( 'wp-logo' ); // Remover submenu Acerca de WordPress
  $wp_admin_bar->remove_menu( 'updates' ); // Remover botón de actualizaciones
  $wp_admin_bar->remove_menu( 'comments' );
  $wp_admin_bar->remove_menu( 'new-media' );
  $wp_admin_bar->remove_menu( 'themes' );
  $wp_admin_bar->remove_menu( 'customize' );
  $wp_admin_bar->remove_menu( 'widgets' );
  $wp_admin_bar->remove_menu( 'menus' );
  $wp_admin_bar->remove_menu( 'new-post' );
  $wp_admin_bar->remove_menu( 'new-page' );
}
add_action( 'wp_before_admin_bar_render', 'ramasilveyra_remove_admin_bar_links' );

function ramasilveyra_remove_tamanos_menu() {
  $current_user = wp_get_current_user();
  remove_menu_page( 'edit.php' );
  if ($current_user->user_login != 'shanky' && $current_user->user_login != 'ramasilveyra') {
    remove_menu_page( 'edit-comments.php' );
    remove_menu_page( 'plugins.php' );
    remove_menu_page( 'tools.php' );
    remove_menu_page( 'options-general.php' );
    remove_submenu_page( 'edit.php?post_type=page', 'post-new.php?post_type=page' );
    remove_submenu_page( 'index.php', 'update-core.php' );
    remove_submenu_page( 'themes.php', 'themes.php' );
    remove_submenu_page( 'themes.php', 'customize.php' );
    remove_submenu_page( 'themes.php', 'nav-menus.php' );
    remove_submenu_page( 'themes.php', 'theme-editor.php' );
  }
}
add_action( 'admin_menu', 'ramasilveyra_remove_tamanos_menu', 999 );

/**
 * Ocultar noticias de actualizacion
 */
function ramasilveyra_hide_update_notice() {
  remove_action( 'admin_notices', 'update_nag', 3 );
}
add_action( 'admin_head', 'ramasilveyra_hide_update_notice', 1 );

/**
 * Remover pestaña de ayuda
 */
function ramasilveyra_remove_helph_tab( $old_help, $screen_id, $screen ) {
  $screen->remove_help_tabs();
  return $old_help;
}
add_filter( 'contextual_help', 'ramasilveyra_remove_helph_tab', 999, 3 );

/**
 * Cambiar base de las urls
 */
function ramasilveyra_change_slug() {
  global $wp_rewrite;

  $wp_rewrite->author_base     = 'autor';
  $wp_rewrite->category_base   = 'categoria';
  $wp_rewrite->pagination_base = 'pagina';
  $wp_rewrite->search_base     = 'busqueda';
}
add_action( 'init', 'ramasilveyra_change_slug' );

/**
 * Cambiar logo de inicio de sesión
 */
function ramasilveyra_login_logo() { ?>
  <style>body.login div#login h1 a {background-image: url('<?php echo get_site_url(); ?>/apple-touch-icon.png');}</style>
<?php }
add_action( 'login_enqueue_scripts', 'ramasilveyra_login_logo' );

/**
 * Cabeceras de correo personalizadas.
 */
function ramasilveyra_website_email() {
  $sitename = strtolower( $_SERVER['SERVER_NAME'] );
  if ( substr($sitename, 0, 4) == 'www.' ) {
    $sitename = substr( $sitename, 4 );
  }
  $sender_email = 'notificacion@' . $sitename;
  return $sender_email;
}
add_filter( 'wp_mail_from', 'ramasilveyra_website_email' );

function ramasilveyra_website_name() {
  $site_name = get_bloginfo( 'name' );
  return $site_name;
}
add_filter( 'wp_mail_from_name', 'ramasilveyra_website_name' );

/**
 * Redirije los resultados de busqueda de /?s=query a /search/query/, y convierte los %20 a +.
 */
function ramasilveyra_nice_search() {
  global $wp_rewrite;

  if ( !isset($wp_rewrite) || !is_object($wp_rewrite) || !$wp_rewrite->using_permalinks() ) {
    return;
  }

  $search_base = $wp_rewrite->search_base;
  if ( is_search() && !is_admin() && strpos($_SERVER['REQUEST_URI'], "/{$search_base}/") === false ) {
    wp_redirect( esc_url_raw(home_url("/{$search_base}/" . get_query_var('s'))) );
    exit();
  }
}
add_action( 'template_redirect', 'ramasilveyra_nice_search' );

/**
 * Permitir iniciar sesión con el correo electrónico
 */
function ramasilveyra_authenticate_example( $username ) {
  $user = get_user_by( 'email', $username );
  if ( ! empty( $user->user_login ) ) {
    $username = $user->user_login;
  }
  return $username;
}
add_action( 'wp_authenticate', 'ramasilveyra_authenticate_example' );

/**
 * Contactarme
 */
function ramasilveyra_before_admin_bar_render_example() {
  global $wp_admin_bar;
  $wp_admin_bar->add_node( array(
    'id'  => 'contact-designer',
    'title' => 'Contactar Ramiro Silveyra d\'Avila',
    'href'  => 'https://ramasilveyra.com.ar/#contacto',
    'meta'  => array( 'target' => '_blank' )
  ) );
}
add_action( 'wp_before_admin_bar_render', 'ramasilveyra_before_admin_bar_render_example' );
 
/**
 * Eliminar atributos img y height de las imagenes
 */
add_filter( 'post_thumbnail_html', 'ramasilveyra_width_attribute', 10 );
add_filter( 'image_send_to_editor', 'ramasilveyra_width_attribute', 10 );

function ramasilveyra_width_attribute( $html ) {
   $html = preg_replace( '/(width|height)="\d*"\s/', '', $html );
   return $html;
}

/**
 * Deshablilitar los comentarios
 */
// Disable support for comments and trackbacks in post types
function ramasilveyra_disable_comments_post_types_support() {
  $post_types = get_post_types();
  foreach ( $post_types as $post_type ) {
    if ( post_type_supports($post_type, 'comments') ) {
      remove_post_type_support( $post_type, 'comments' );
      remove_post_type_support( $post_type, 'trackbacks' );
    }
  }
}
add_action( 'admin_init', 'ramasilveyra_disable_comments_post_types_support' );

// Cerrar comentarios
function ramasilveyra_disable_comments_status() {
  return false;
}
add_filter( 'comments_open', 'ramasilveyra_disable_comments_status', 20, 2 );
add_filter( 'pings_open', 'ramasilveyra_disable_comments_status', 20, 2 );

// Ocultar comentarios existentes
function ramasilveyra_disable_comments_hide_existing_comments( $comments ) {
  $comments = array();
  return $comments;
}
add_filter('comments_array', 'ramasilveyra_disable_comments_hide_existing_comments', 10, 2);

// Eliminar menu de comentarios del panel
function ramasilveyra_disable_comments_admin_menu() {
  remove_menu_page( 'edit-comments.php' );
}
add_action( 'admin_menu', 'ramasilveyra_disable_comments_admin_menu' );

// Redireccionar cualquier usuario intentando accede a la pagina de comentarios
function ramasilveyra_disable_comments_admin_menu_redirect() {
  global $pagenow;
  if ( $pagenow === 'edit-comments.php' ) {
    wp_redirect( admin_url() );
    exit;
  }
}
add_action( 'admin_init', 'ramasilveyra_disable_comments_admin_menu_redirect' );

// Eliminar widget de comentarios del panel de administración
function ramasilveyra_disable_comments_dashboard() {
  remove_meta_box( 'dashboard_recent_comments', 'dashboard', 'normal' );
}
add_action( 'admin_init', 'ramasilveyra_disable_comments_dashboard' );

// Eliminar enlaces a comentarios del panel de administración
function ramasilveyra_disable_comments_admin_bar() {
  if ( is_admin_bar_showing() ) {
    remove_action( 'admin_bar_menu', 'wp_admin_bar_comments_menu', 60 );
  }
}
add_action( 'init', 'ramasilveyra_disable_comments_admin_bar' );

/**
 * Soporte para Woocommerce y añade moneda argentina
 */
add_action( 'after_setup_theme', 'ramasilveyra_woocommerce_support' );
function ramasilveyra_woocommerce_support() {
  add_theme_support( 'woocommerce' );
}

function ramasilveyra_add_ars_currency( $currencies ) {
  $currencies['ARS'] = __( 'Pesos Argentinos', 'woothemes' );
  return $currencies;
}
add_filter( 'woocommerce_currencies', 'ramasilveyra_add_ars_currency' );
function ramasilveyra_add_ars_symbol( $currency_symbol, $currency ) {
  switch( $currency ) {
    case 'ARS':
      $currency_symbol = '$';
    break;
  }
  return $currency_symbol;
}
add_filter( 'woocommerce_currency_symbol', 'ramasilveyra_add_ars_symbol', 1, 2);

/**
 * Fomentar una emantica valida
 */
function ramasilveyra_tinymce_init( $init ) {
  $init['theme_advanced_blockformats'] = 'p,h2,h3,h4,h5,h6';
  return $init;
}
add_filter('tiny_mce_before_init', 'ramasilveyra_tinymce_init' );