functions.php

<?php
// Let WordPress manage the document title.
add_theme_support( 'title-tag' );

// Enable support for Post Thumbnails on posts and pages.
add_theme_support( 'post-thumbnails', array( 'post', 'page' ) );

// Theme Menus
register_nav_menus( array(
	'primary' => esc_html__( 'Primary', 'bootstarter' ),
) );

// Switch default core markup for search form, comment form, and comments to output valid HTML5.
add_theme_support( 'html5', array(
	'search-form',
	'comment-form',
	'comment-list',
	'gallery',
	'caption',
) );

// Register Bootstrap Navigation Walker
require get_template_directory() . '/inc/wp_bootstrap_navwalker.php';

// Disable Woocommerce Default Styling
add_filter( 'woocommerce_enqueue_styles', '__return_empty_array' );

// Add Woocommerce support
function woocommerce_support() {
    add_theme_support( 'woocommerce' );
}
add_action( 'after_setup_theme', 'woocommerce_support' );

// Update the wrappers around Woocommerce pages
remove_action( 'woocommerce_before_main_content', 'woocommerce_output_content_wrapper', 10);
add_action('woocommerce_before_main_content', 'my_content_wrapper_start', 10);
function my_content_wrapper_start() {
	echo '<main id="main" class="site-main" role="main">';
}
remove_action( 'woocommerce_after_main_content', 'woocommerce_output_content_wrapper_end', 10);
add_action('woocommerce_after_main_content', 'my_content_wrapper_end', 10);
function my_content_wrapper_end() {
	echo '</main><!-- #main -->';
}

// Remove Woocommerce actions
// remove_action( 'woocommerce_sidebar', 'woocommerce_get_sidebar', 10);
// remove_action( 'woocommerce_before_main_content', 'woocommerce_breadcrumb', 20, 0 );
// remove_action( 'woocommerce_before_shop_loop', 'woocommerce_result_count', 20 );
// remove_action( 'woocommerce_before_shop_loop', 'woocommerce_catalog_ordering', 30 );
// remove_action( 'woocommerce_after_shop_loop_item', 'woocommerce_template_loop_add_to_cart', 10 );
// remove_action( 'woocommerce_after_single_product_summary', 'woocommerce_output_related_products', 20 );
// remove_action( 'woocommerce_single_product_summary', 'woocommerce_template_single_meta', 40 );

// Remove review tab on Woocommerce product page
// add_filter( 'woocommerce_product_tabs', 'remove_reviews_tab', 98);
// function remove_reviews_tab($tabs) {
// 	unset($tabs['reviews']);
// 	return $tabs;
// }

// Custom CSS for WYSIWYG editor
function custom_editor_style() {
	add_editor_style(get_stylesheet_directory_uri().'/css/style-wysiwyg-editor.css');
}
add_action('after_setup_theme', 'custom_editor_style');

// Add CSS to back end
function css_to_back_end() {
	if ( !current_user_can('manage_options') ) {
		echo '<link rel="stylesheet" href="'.get_stylesheet_directory_uri().'/css/style-for-editors.css">';
	}
}
add_action('admin_head', 'css_to_back_end');

// Remove some nodes from admin top bar menu
// add_action( 'admin_bar_menu', 'remove_some_nodes_from_admin_top_bar_menu', 999 );
// function remove_some_nodes_from_admin_top_bar_menu( $wp_admin_bar ) {
//     $wp_admin_bar->remove_menu( 'customize' );
// 	$wp_admin_bar->remove_menu( 'wp-logo' );
// 	$wp_admin_bar->remove_menu( 'updates' );
// 	$wp_admin_bar->remove_menu( 'comments' );
// 	$wp_admin_bar->remove_menu( 'new-content' );
// 	$wp_admin_bar->remove_menu( 'search' );
// }

// Remove some unwanted submenu entries for editors
add_action( 'admin_menu', 'remove_entries_for_editors', 999 );
function remove_entries_for_editors() {
	if ( !current_user_can('manage_options') ) {
		remove_submenu_page( 'themes.php', 'themes.php' );
		remove_submenu_page( 'themes.php', 'widgets.php' );
		$customize_url_arr = array();
	    $customize_url_arr[] = 'customize.php'; // 3.x
	    $customize_url = add_query_arg( 'return', urlencode( wp_unslash( $_SERVER['REQUEST_URI'] ) ), 'customize.php' );
	    $customize_url_arr[] = $customize_url; // 4.0 & 4.1
	    if ( current_theme_supports( 'custom-header' ) && current_user_can( 'customize') ) {
	        $customize_url_arr[] = add_query_arg( 'autofocus[control]', 'header_image', $customize_url ); // 4.1
	        $customize_url_arr[] = 'custom-header'; // 4.0
	    }
	    if ( current_theme_supports( 'custom-background' ) && current_user_can( 'customize') ) {
	        $customize_url_arr[] = add_query_arg( 'autofocus[control]', 'background_image', $customize_url ); // 4.1
	        $customize_url_arr[] = 'custom-background'; // 4.0
	    }
	    foreach ( $customize_url_arr as $customize_url ) {
	    	remove_submenu_page( 'themes.php', $customize_url );
	    }
	}
}

// customise the login
function my_login_logo_url() {
    return home_url();
}
add_filter( 'login_headerurl', 'my_login_logo_url' );
function my_login_logo_url_title() {
    return get_bloginfo( 'name' );
}
add_filter( 'login_headertitle', 'my_login_logo_url_title' );
function my_login_stylesheet() {
    wp_enqueue_style( 'custom-login', get_stylesheet_directory_uri() . '/css/style-login.css' );
}
add_action( 'login_enqueue_scripts', 'my_login_stylesheet' );

// custom excerpt lenght
function custom_excerpt_length( $length ) {
	return 16;
}
add_filter( 'excerpt_length', 'custom_excerpt_length', 999 );

// Remove Multilingual Content Setup metabox on every post type edit page
add_action('admin_head', 'disable_icl_metabox');
function disable_icl_metabox() {
    $screen = get_current_screen();
    remove_meta_box('icl_div_config',$screen->post_type,'normal');
}

// Custom image sizes
add_action( 'after_setup_theme', 'custom_image_sizes' );
function custom_image_sizes() {
    add_image_size( 'image-1920px-wide', 1920 ); // 1920 pixels wide (and unlimited height)
	// use 'medium_large' for 768 pixels wide
    add_image_size( 'image-384px-wide', 384 ); // 768 / 2 = 384 pixels wide (and unlimited height)
    add_image_size( 'image-192px-wide', 192 ); // 384 / 2 = 192 pixels wide (and unlimited height)
}

// Page Template Dashboard
add_filter('manage_edit-page_columns', 'add_template_column' );
function add_template_column( $page_columns ) {
	unset($page_columns['comments']);

	$author = $page_columns['author'];
	unset($page_columns['author']);
	$date = $page_columns['date'];
	unset($page_columns['date']);

	$page_columns['template'] = 'Page Template';
	$page_columns['order'] = 'Order';
	//$page_columns['author'] = $author;
	$page_columns['date'] = $date;

	return $page_columns;
}
add_action('manage_page_posts_custom_column', 'add_template_data' );
function add_template_data( $column_name ) {
	if ( 'template' !== $column_name ) {
		return;
	}
	global $post;

	$template_name = get_page_template_slug( $post->ID );
	$template      = untrailingslashit( get_stylesheet_directory() ) . '/' . $template_name;

	$template_name = ( 0 === strlen( trim( $template_name ) ) || ! file_exists( $template ) ) ?
		'Default' :
		ucwords( str_ireplace( array('-','.php'), array(' ',''), get_file_description( $template ) ) );

	echo esc_html( $template_name );
}
add_action('manage_page_posts_custom_column', 'add_order_data' );
function add_order_data( $column_name ) {
	if ( 'order' !== $column_name ) {
		return;
	}
	global $post;

	$order = $post->menu_order;

	echo esc_html( $order );
}

// add editor extra capabilities
function add_editor_extra_capabilities() {
	// get the the role object
	$role_object = get_role( 'editor' );
	// add $cap capability to this role object if it doesn't have yet
	if( !$role_object->has_cap('edit_theme_options') ){
		$role_object->add_cap( 'edit_theme_options' );
	}
}
add_action( 'admin_init', 'add_editor_extra_capabilities' );

// remove wp emoji
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' );

// do not load jquery
add_action('wp_enqueue_scripts', 'do_not_load_jquery');
function do_not_load_jquery(){
    wp_deregister_script('jquery');
	wp_register_script('jquery', '', '', '', true);
}

// let ACF check for updates for not https websites
add_filter( 'https_ssl_verify', '__return_false' );

// change label of Media to Media Library
function change_post_menu_label() {
    global $menu;
    $menu[10][0] = 'Media Library';
	return;
}
add_action( 'admin_menu', 'change_post_menu_label' );

// remove admin menu items
function custom_menu_page_removing() {
	//remove_menu_page( 'edit.php' );                   //Posts
	remove_menu_page( 'edit-comments.php' );          //Comments
	remove_menu_page( 'tools.php' );                  //Tools
}
add_action( 'admin_menu', 'custom_menu_page_removing' );

// ACF options
if( function_exists('acf_add_options_page') ) {

	acf_add_options_page(array(
		'page_title' 	=> 'Global Content',
		'menu_title'	=> 'Global Content',
		'menu_slug' 	=> 'global-content',
		'capability'	=> 'edit_posts',
		'position' => '31',
	));

}

/**
 * Extend WordPress search to include custom fields
 *
 * https://adambalee.com
 */

/**
 * Join posts and postmeta tables
 *
 * http://codex.wordpress.org/Plugin_API/Filter_Reference/posts_join
 */
function cf_search_join( $join ) {
    global $wpdb;

    if ( is_search() ) {
        $join .=' LEFT JOIN '.$wpdb->postmeta. ' ON '. $wpdb->posts . '.ID = ' . $wpdb->postmeta . '.post_id ';
    }

    return $join;
}
add_filter('posts_join', 'cf_search_join' );

/**
 * Modify the search query with posts_where
 *
 * http://codex.wordpress.org/Plugin_API/Filter_Reference/posts_where
 */
function cf_search_where( $where ) {
    global $pagenow, $wpdb;

    if ( is_search() ) {
        $where = preg_replace(
            "/\(\s*".$wpdb->posts.".post_title\s+LIKE\s*(\'[^\']+\')\s*\)/",
            "(".$wpdb->posts.".post_title LIKE $1) OR (".$wpdb->postmeta.".meta_value LIKE $1)", $where );
    }

    return $where;
}
add_filter( 'posts_where', 'cf_search_where' );

/**
 * Prevent duplicates
 *
 * http://codex.wordpress.org/Plugin_API/Filter_Reference/posts_distinct
 */
function cf_search_distinct( $where ) {
    global $wpdb;

    if ( is_search() ) {
        return "DISTINCT";
    }

    return $where;
}
add_filter( 'posts_distinct', 'cf_search_distinct' );