WooCommerce

// =========================================================================
// Custom Text on Product Page based on Shipping Class 
// =========================================================================
function display_shipping_class_on_product_page() {
    $product = wc_get_product();

    $shipping_class = $product->get_shipping_class();

    switch ( $shipping_class ) {
        case 'your_shipping_class_1':
            echo '';
            break;
        case 'your_shipping_class_2':
            echo '';
            break;
    }
}
add_action( 'woocommerce_single_product_summary', 'display_shipping_class_on_product_page', 10 );

//Echo something if product is out of stock
add_action( 'woocommerce_share', 'add_out_of_stock_custom_message', 5 );
function add_out_of_stock_custom_message() {
    global $product;
    if ( ! $product->is_in_stock() ) {
            echo '';
        }

}

//Disable Payment Gateway For Specific Shipping Method
 
add_filter( 'woocommerce_available_payment_gateways', 'wpninja_gateway_disable_shipping_326' );
 
function wpninja_gateway_disable_shipping_326( $available_gateways ) {
 
    global $woocommerce;
     
    if ( !is_admin() ) {
         
        $chosen_methods = WC()->session->get( 'chosen_shipping_methods' );
         
        $chosen_shipping = $chosen_methods[0];
         
        if ( isset( $available_gateways['cod'] ) && 0 === strpos( $chosen_shipping, 'free_shipping' ) ) {
            unset( $available_gateways['barion'] );
        }
        
    }
     
return $available_gateways;
     
}

/**
 * Search by product SKU
 */
function wpninja_product_search_sku( $join, $query ) {
	if ( ! $query->is_main_query() || is_admin() || ! is_search() || ! is_woocommerce() ) {
		return $join;
	}

	global $wpdb;

	$join .= " LEFT JOIN {$wpdb->postmeta} wpninja_post_meta ON {$wpdb->posts}.ID = wpninja_post_meta.post_id ";

	return $join;
}

add_filter( 'posts_join', 'wpninja_product_search_sku', 10, 2 );

/**
 * Modify the search query with posts_where.
 */
function wpninja_product_search_where( $where, $query ) {
	if ( ! $query->is_main_query() || is_admin() || ! is_search() || ! is_woocommerce() ) {
		return $where;
	}

	global $wpdb;

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

	return $where;
}

add_filter( 'posts_where', 'wpninja_product_search_where', 10, 2 );

//Show SKU above the product title
function fdesign_show_sku(){
    global $product;
    echo '<small>Cikkszám:</small> <small>' . $product->get_sku() .'</small>';
}
add_action( 'woocommerce_before_single_product_summary', 'fdesign_show_sku', 5 );

//Show Product Search in Header
function new_nav_menu_items($items, $args) {
    
    $my_product_search = get_product_search_form( $echo );
    
    if($args->theme_location == 'main_navigation'){
       $items = $items . $my_product_search;
    }

    return $items;
}
add_filter('wp_nav_menu_items', 'new_nav_menu_items', 10, 2);

jQuery(function($){
    $( "a.woocommerce-terms-and-conditions-link" ).unbind( "click" );
    $( "body" ).on('click', 'a.woocommerce-terms-and-conditions-link', function( event ) {

         $(this).attr("target", "_blank");
        window.open( $(this).attr("href"));

        return false;
    });

});

add_action( 'template_redirect', 'snippet_add_product_to_cart' );

function snippet_add_product_to_cart() {

// select ID
$product_id = 21874;

//check if product already in cart
if ( WC()->cart->get_cart_contents_count() == 0 ) {

// if no products in cart, add it
WC()->cart->add_to_cart( $product_id );

}

}

add_action( 'wp', 'add_product_to_cart_on_page_id_load' );

function add_product_to_cart_on_page_id_load() {

// product ID to add to cart
$product_id = 21874;

// page ID to target
if ( is_page( 19473 ) ) {
WC()->cart->empty_cart();
WC()->cart->add_to_cart( $product_id );
}

}

//ADD CUSTOM FIELD TO SINGLE PRODUCT BEFORE ADD TO CART BUTTON
add_action( 'woocommerce_single_variation', 'add_custom_field_before_addtocart', 5 );
function add_custom_field_before_addtocart() {
include('woo/custom-field.php');
}

<?php the_field('custom'); ?>

add_action('woocommerce_email_after_order_table', 'add_email_shipping_text');
function add_email_shipping_text(){
echo '';
}