WordPress und Woocommerce Snippets für Deine Seite (Teil 1)

add_action('admin_init', function () {
    // Redirect any user trying to access comments page
    global $pagenow;
    
    if ($pagenow === 'edit-comments.php') {
        wp_redirect(admin_url());
        exit;
    }

    // Remove comments metabox from dashboard
    remove_meta_box('dashboard_recent_comments', 'dashboard', 'normal');

    // Disable support for comments and trackbacks in post types
    foreach (get_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');
        }
    }
});

// Close comments on the front-end
add_filter('comments_open', '__return_false', 20, 2);
add_filter('pings_open', '__return_false', 20, 2);

// Hide existing comments
add_filter('comments_array', '__return_empty_array', 10, 2);

// Remove comments page in menu
add_action('admin_menu', function () {
    remove_menu_page('edit-comments.php');
});

// Remove comments links from admin bar
add_action('init', function () {
    if (is_admin_bar_showing()) {
        remove_action('admin_bar_menu', 'wp_admin_bar_comments_menu', 60);
    }
});


// Removes from admin menu
add_action( 'admin_menu', 'my_remove_admin_menus' );
function my_remove_admin_menus() {
    remove_menu_page( 'edit-comments.php' );
}
// Removes from post and pages
add_action('init', 'remove_comment_support', 100);

function remove_comment_support() {
    remove_post_type_support( 'post', 'comments' );
    remove_post_type_support( 'page', 'comments' );
}
// Removes from admin bar
function mytheme_admin_bar_render() {
    global $wp_admin_bar;
    $wp_admin_bar->remove_menu('comments');
}
add_action( 'wp_before_admin_bar_render', 'mytheme_admin_bar_render' );

/**
 * Callback function that returns true if the current page is a WooCommerce page or false if otherwise.
 *
 * @return boolean true for WC pages and false for non WC pages
 */
function is_wc_page() {
	return class_exists( 'WooCommerce' ) && ( is_woocommerce() || is_cart() || is_checkout() || is_account_page() );
}

add_action( 'template_redirect', 'conditionally_remove_wc_assets' );
/**
 * Remove WC stuff on non WC pages.
 */
function conditionally_remove_wc_assets() {
	// if this is a WC page, abort.
	if ( is_wc_page() ) {
		return;
	}

	// remove WC generator tag
	remove_filter( 'get_the_generator_html', 'wc_generator_tag', 10, 2 );
	remove_filter( 'get_the_generator_xhtml', 'wc_generator_tag', 10, 2 );

	// unload WC scripts
	
	remove_action( 'wp_print_scripts', [ WC_Frontend_Scripts::class, 'localize_printed_scripts' ], 5 );
	remove_action( 'wp_print_footer_scripts', [ WC_Frontend_Scripts::class, 'localize_printed_scripts' ], 5 );

	// remove "Show the gallery if JS is disabled"
	remove_action( 'wp_head', 'wc_gallery_noscript' );

	// remove WC body class
	remove_filter( 'body_class', 'wc_body_class' );
}

add_filter( 'woocommerce_enqueue_styles', 'conditionally_woocommerce_enqueue_styles' );
/**
 * Unload WC stylesheets on non WC pages
 *
 * @param array $enqueue_styles
 */
function conditionally_woocommerce_enqueue_styles( $enqueue_styles ) {
	return is_wc_page() ? $enqueue_styles : array();
}
add_action( 'wp_enqueue_scripts', 'conditionally_wp_enqueue_scripts' );
/**
 * Remove inline style on non WC pages
 */
function conditionally_wp_enqueue_scripts() {
	if ( ! is_wc_page() ) {
		wp_dequeue_style( 'woocommerce-inline' );
	}
}

// add_action( 'init', 'remove_wc_custom_action' );
function remove_wc_custom_action(){
	remove_action( 'wp_head', 'wc_gallery_noscript' );
}
add_filter( 'woocommerce_admin_disabled', '__return_true' );

/**
 * Replace the home link URL
 */
add_filter( 'woocommerce_breadcrumb_home_url', 'woo_custom_breadrumb_home_url' );
function woo_custom_breadrumb_home_url() {
    return '/hier-steht-dein-individueller-permalink-name/';
}

/**
 * Rename "home" in breadcrumb
 */
add_filter( 'woocommerce_breadcrumb_defaults', 'wcc_change_breadcrumb_home_text' );
function wcc_change_breadcrumb_home_text( $defaults ) {
    // Change the breadcrumb home text from 'Home' to 'Apartment'
	$defaults['home'] = 'Shop';
	return $defaults;
}

/**
 * Change the breadcrumb separator
 */
add_filter( 'woocommerce_breadcrumb_defaults', 'wcc_change_breadcrumb_delimiter' );
function wcc_change_breadcrumb_delimiter( $defaults ) {
	// Change the breadcrumb delimeter from '/' to '>'
	$defaults['delimiter'] = ' » ';
	return $defaults;
}

add_filter( 'excerpt_length', 'custom_excerpt_length', 999 );

function custom_excerpt_length( $length ) {

    return 20; // 20 steht für 20 Worte im Textauszug

}

function my_cart_crosssell_ids( $cross_sells, $cart ) {

    // Set emtpy array
    $product_cats_ids = array();
    $product_cats_ids_unique = array();

    foreach ( $cart->get_cart() as $cart_item ) {       
        // Get product id
        $product_id = $cart_item['product_id'];

        // Get current product categories id(s) & add to array
        $product_cats_ids = array_merge( $product_cats_ids, wc_get_product_term_ids( $product_id, 'product_cat' ) );
    }

    // Not empty
    if ( !empty( $product_cats_ids ) ) {
        // Removes duplicate values
        $product_cats_ids_unique = array_unique( $product_cats_ids, SORT_REGULAR );

        // Get product id(s) from a certain category, by category-id
        $product_ids_from_cats_ids = get_posts( array(
            'post_type' => 'product',
            'numberposts' => 4,
            'post_status' => 'publish',
            'fields' => 'ids',
            'tax_query' => array(
                array(
                    'taxonomy' => 'product_cat',
                    'field' => 'id',
                    'terms' => $product_cats_ids_unique,
                    'operator' => 'IN',
                )
            ),
        ) );

        // Removes duplicate values
        $cross_sells = array_unique( $product_ids_from_cats_ids, SORT_REGULAR );
    }

    return $cross_sells;
}
add_filter( 'woocommerce_cart_crosssell_ids', 'my_cart_crosssell_ids', 10, 2 );

// New badge for recent products (archive)
add_action( 'woocommerce_before_shop_loop_item_title', 'new_badge', 3 );
          
function new_badge() {
   global $product;
   $newness_days = 30; // Number of days the badge is shown
   $created = strtotime( $product->get_date_created() );
   if ( ( time() - ( 60 * 60 * 24 * $newness_days ) ) < $created ) {
      echo '<span class="ct-woo-card-extra new-badge">' . esc_html__( 'NEU', 'woocommerce' ) . '</span>';
   }
}

// New badge for recent products on single product page
add_action( 'woocommerce_single_product_summary', 'new_badge_single_product', 1 );  
function new_badge_single_product() {
   global $product;
   $newness_days = 30; // Number of days the badge is shown
   $created = strtotime( $product->get_date_created() );
   if ( ( time() - ( 60 * 60 * 24 * $newness_days ) ) < $created ) {
      echo '<span class="itsnew">' . esc_html__( 'NEU', 'woocommerce' ) . '</span>';
   }
}

/ Step 1: Add checkbox 

add_action( 'woocommerce_product_options_general_product_data', 'checkbox_badge' );        
  
function checkbox_badge() {           
woocommerce_wp_checkbox( array( 
'id' => 'checkbox_badge', 
'class' => '', 
'label' => 'Display free shipping badge'
) 
);      
}

// Step 2: Save checkbox selection
  
add_action( 'save_post', 'save_checkbox_badge_selection' );
  
function save_checkbox_badge_selection( $product_id ) {
    if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )
        return;
    if ( isset( $_POST['checkbox_badge'] ) ) {
            update_post_meta( $product_id, 'checkbox_badge', $_POST['checkbox_badge'] );
    } else delete_post_meta( $product_id, 'checkbox_badge' );
}

// Step 3: Display custom badge at single product page
  
add_action( 'woocommerce_before_add_to_cart_form', 'display_checkbox_badge', 7 );
  
function display_checkbox_badge() {
    global $product;     
    if ( get_post_meta( $product->get_id(), 'checkbox_badge', true ) ) {
        echo '
<div class="custom-badge-1">Gratis Versand</div>'; // Change this text if needed
    }
}

// Display Fields
add_action( 'woocommerce_product_options_general_product_data', 'woo_add_custom_fields' );

// Save Fields
add_action( 'woocommerce_process_product_meta', 'woo_add_custom_fields_save' );

function woo_add_custom_fields() {

  global $woocommerce, $post;
  
  echo '<div class="options_group">';
  
 // Display Woocommerce product badge box in product edit page
woocommerce_wp_text_input( 
	array( 
		'id'          => '_text_field', 
		'label'       => __( 'Badge text', 'woocommerce' ), 
		'placeholder' => 'Enter your badge text here',
		'desc_tip'    => 'true',
		'description' => __( 'Enter your badge text here', 'woocommerce' ) 
	)
); 
  echo '</div>';	
}
function woo_add_custom_fields_save( $post_id ){
	// Text Field
	$woocommerce_text_field = $_POST['_text_field'];
	if( !empty( $woocommerce_text_field ) )
		update_post_meta( $post_id, '_text_field', esc_attr( $woocommerce_text_field ) );
}

// Display Woocommerce product badge with custom text in single product page
add_action('woocommerce_before_add_to_cart_form', 'display_custom_field_value', 7 );
function display_custom_field_value(){
  $value = get_post_meta( get_the_ID(), '_text_field', true);
  if(strlen($value) != null && strlen($value) > 0) {
	echo '<div class="custom-badge">'.get_post_meta( get_the_ID(), '_text_field', true ).'</div>';
  }
}

add_action('admin_head', 'my_custom_admin_css');

function my_custom_admin_css() {
  echo '<style>
  Dein CSS Code hier!


 </style>';
}

add_action( 'admin_init', 'show_modified_date_in_admin_lists_language' );
function show_modified_date_in_admin_lists_language() {
	load_plugin_textdomain( 'show-modified-date-in-admin-lists', false,  dirname( plugin_basename( __FILE__ ) ) . '/languages/' );
}

// Register Modified Date Column for both posts & pages
function modified_column_register( $columns ) {
	$columns['Modified'] = __( 'Modified Date', 'show-modified-date-in-admin-lists' );
	return $columns;
}
add_filter( 'manage_posts_columns', 'modified_column_register' );
add_filter( 'manage_pages_columns', 'modified_column_register' );

function modified_column_display( $column_name, $post_id ) {
	switch ( $column_name ) {
	case 'Modified':
		global $post; 
	       	echo '<p class="mod-date">';
	       	echo '<em>'.get_the_modified_date().' '.get_the_modified_time().'</em><br />';
			if ( !empty( get_the_modified_author() ) ) {
				echo '<small>' . esc_html__( 'by', 'show-modified-date-in-admin-lists' ) . ' <strong>'.get_the_modified_author().'<strong></small>';
			} else {
				echo '<small>' . esc_html__( 'by', 'show-modified-date-in-admin-lists' ) . ' <strong>' . esc_html__( 'Wordpress', 'show-modified-date-in-admin-lists' ) . '<strong></small>';
			}
			echo '</p>';
		break; // end all case breaks
	}
}
add_action( 'manage_posts_custom_column', 'modified_column_display', 10, 2 );
add_action( 'manage_pages_custom_column', 'modified_column_display', 10, 2 );

function modified_column_register_sortable( $columns ) {
	$columns['Modified'] = 'modified';
	return $columns;
}
add_filter( 'manage_edit-post_sortable_columns', 'modified_column_register_sortable' );
add_filter( 'manage_edit-page_sortable_columns', 'modified_column_register_sortable' );