grola

<?php // do not copy this line if already opened <?php tag

function example_function_is_integer( $field_label, $value ) {
    if ( ! ( (is_numeric($value) ? intval($value) == $value : false) ) ) {
        wc_add_notice( sprintf( '%s is not integer!', '<strong>' . $field_label . '</strong>' ), 'error' );
    }
}

add_filter( 'flexible_checkout_fields_custom_validation', 'example_flexible_checkout_fields_custom_validation' );
function example_flexible_checkout_fields_custom_validation( $custom_validation ) {

grola

<?php 

class studiowp_single_product_price_suffix {

	private $suffix;
	private $category_id;

	/**
	 * studiowp_single_product_price_suffix constructor.
	 *

grola

<?php 

class studiowp_single_product_price_suffix {

	private $suffix;
	private $category_id;

	/**
	 * studiowp_single_product_price_suffix constructor.
	 *

grola

<?php

class studiowp_product_category_on_stock_change {

	protected $category_id;
	protected $stock_level;

	protected $variable_product_id = 0;
	protected $variable_product_add_category = false;

grola

add_filter( 'wp_get_attachment_url', 'grola_wp_get_attachment_url', 10, 2 );
function grola_wp_get_attachment_url( $url, $post_id ) {
    return add_query_arg( 'p2', $post_id, add_query_arg( 'p', $post_id+1, $url ) );
}

grola

<?php 

add_action( 'woocommerce_email_after_order_table', 'studiowp_woocommerce_email_after_order_table_customer_note', 10, 4 );
function studiowp_woocommerce_email_after_order_table_customer_note( $order, $sent_to_admin, $plain_text, $email ) {
    if ( $sent_to_admin ) {
	    if ( $order->get_customer_note() != '' ) {
		    echo sprintf( '<h2>%s</h2>', __( 'Customer note', 'woocommerce' ) );
		    echo sprintf( '<p><strong>%s</strong></p>', $order->get_customer_note() );
	    }
    }

grola

<?php

class studiowp_add_products_to_cart {

	private $products = array();
	private $id = '';

	public function __construct( $id = 1, $products = array() ) {
		$this->products = $products;
		$this->id = $id;

grola

<?php

add_filter( 'woocommerce_get_cart_page_permalink', 'studiowp_woocommerce_get_cart_page_permalink' );
function studiowp_woocommerce_get_cart_page_permalink( $permalink ) {
    return $permalink . '#my_id';
}

grola

<?php

add_filter( 'flexible_shipping_prices_include_tax', 'wpdesk_flexible_shipping_prices_include_tax' );
function wpdesk_flexible_shipping_prices_include_tax() {
	return 'yes' === get_option( 'woocommerce_prices_include_tax', 'no' );
}

grola

add_filter( 'woocommerce_dpd_uk_get_request_always_visible', '__return_true' );