SiR-DanieL

<?php
add_action( 'woocommerce_email_header', 'add_email_header', 20 );
function add_email_header() {
    echo '<h2>My Heading</h2>';
    echo '<p>Add content here</p>';
}

SiR-DanieL

<?php
add_filter( 'body_class', 'add_preorder_class' );
add_filter( 'post_class', 'add_preorder_class' );
function add_preorder_class( $classes ) {
	global $post;

	$product = wc_get_product( $post->ID );
	if ( $product && 'yes' === get_post_meta( $product->get_id(), '_wc_pre_orders_enabled', true ) ) {
		$classes[] = 'pre-order';
	}

SiR-DanieL

<?php
/**
 * Sets the product default price to 10. Only works once, if the price is not specified.
 *
 * @param int    $post_id
 * @param object $post
 */
function set_product_default_price( $post_id, $post ) {
	$product     = wc_get_product( $post_id );
	$already_set = get_post_meta( $post_id, '_set_default_price', true );

SiR-DanieL

<?php
/**
  * Display the theme credit
  *
  * @since  1.0.0
  * @return void
  */
 function storefront_credit() {
	 ?>
	 <div class="site-info">

SiR-DanieL

<?php
add_filter( 'wp_discord_post_is_new_post', 'wp_discord_post_limit_by_category' );
function wp_discord_post_limit_by_category( $post ) {
	return has_category( array( 'Category  1', 'Category 2' ), $post );
}

SiR-DanieL

<?php
add_filter( 'wp_discord_post_is_new_post', 'wp_discord_post_limit_by_category' );
function wp_discord_post_limit_by_category( $post ) {
	return has_category( 'Your Category  Name', $post );
}

SiR-DanieL

<?php
add_filter( 'woocommerce_add_to_cart_validation', 'wc_limit_one_per_order', 10, 2 );
function wc_limit_one_per_order( $passed_validation, $product_id ) {
	if ( 31 !== $product_id ) {
		return $passed_validation;
	}

	if ( WC()->cart->get_cart_contents_count() >= 1 ) {
		wc_add_notice( __( 'This product cannot be purchased with other products. Please, empty your cart first and then add it again.', 'woocommerce' ), 'error' );
		return false;

SiR-DanieL

<?php
add_action( 'woocommerce_order_details_after_order_table', 'post_sale_cross_sell' );
function post_sale_cross_sell( $order ) {
	$cross_sells = array();
	$in_order     = array();

	foreach ( $order->get_items() as $item ) {
		$product_id  = $order->get_item( $item )->get_product_id();
		$product     = wc_get_product( $product_id );
		$cross_sells = array_merge( $product->get_cross_sell_ids(), $cross_sells );

SiR-DanieL

<?php
// Delete Expired Coupons that have an expiration date set and are not from AutomateWoo
add_action('delete_expired_coupons_hook', 'delete_expired_coupons_action');
function delete_expired_coupons_action() {
	$query_args = [
		'fields'         => 'ids',
		'post_type'      => 'shop_coupon',
		'post_status'    => 'any',
		'posts_per_page' => -1,
		'orderby'        => 'date',

SiR-DanieL

<?php
add_action( 'woocommerce_cart_coupon', 'woocommerce_empty_cart_button' );
function woocommerce_empty_cart_button() {
	echo '<a href="' . esc_url( add_query_arg( 'empty_cart', 'yes' ) ) . '" class="button" title="' . esc_attr( 'Empty Cart', 'woocommerce' ) . '">' . esc_html( 'Empty Cart', 'woocommerce' ) . '</a>';
}