ScottDeLuzio

add_action('woocommerce_after_order_notes', 'conditional_checkout_field');

ScottDeLuzio

<?php
function conditional_checkout_field( $checkout ) {
echo '<div id="conditional_checkout_field">';
 
$check_in_cart = conditional_product_in_cart(xxxx); //replace xxxx with the product id
       
        // Check if the product is in the cart and show the custom fields if it is
        if ($check_in_cart === true ) {
                echo '<h2>'.__('My Custom Checkout Field').'</h2>';
 

ScottDeLuzio

DELETE FROM wp_options
WHERE option_name LIKE '_wc_session_%' OR option_name LIKE '_wc_session_expires_%';

ScottDeLuzio

DELETE FROM wp_options
WHERE option_name LIKE '_transient_wc_%' OR option_name LIKE '_transient_timeout_wc_%';

ScottDeLuzio

User-agent: *
Disallow: /*add-to-cart=*

ScottDeLuzio

/**
 * Add the field to the checkout page
 */
add_action( 'woocommerce_after_order_notes', 'some_custom_checkout_field' );
 
function some_custom_checkout_field( $checkout ) {
 
    echo '<div id="some_custom_checkout_field"><h2>' . __('My Field Header') . '</h2>';
 
    woocommerce_form_field( 'some_field_name', array(

ScottDeLuzio

<?php
/**
 * Process the checkout
 */
add_action('woocommerce_checkout_process', 'some_custom_checkout_field_process');
 
function some_custom_checkout_field_process() {
    // Check if the field is set, if not then show an error message.
    if ( ! $_POST['some_field_name'] )
        wc_add_notice( __( 'Please enter something here.' ), 'error' );

ScottDeLuzio

<?php
/**
 * Update the order meta with field value
 */
add_action( 'woocommerce_checkout_update_order_meta', 'some_custom_checkout_field_update_order_meta' );
 
function some_custom_checkout_field_update_order_meta( $order_id ) {
    if ( ! empty( $_POST['some_field_name'] ) ) {
        update_post_meta( $order_id, 'Some Field', sanitize_text_field( $_POST['some_field_name'] ) );
    }

ScottDeLuzio

<?php
/**
 * Add the field to order emails
 **/
add_filter( 'woocommerce_email_order_meta_keys', 'some_order_meta_keys' );
 
function some_order_meta_keys() {
        if (get_post_meta( get_the_ID(), 'Some Field')) {
                echo 'This is the custom information you entered in Some Field: ' . get_post_meta( get_the_ID(), 'Some Field', true) . '<br />';
        }

ScottDeLuzio

<?php
// WooCommerce Checkout Fields Hook
add_filter( 'woocommerce_checkout_fields' , 'custom_wc_checkout_fields' );
 
// Change order comments placeholder and label, and set billing phone number to not required.
function custom_wc_checkout_fields( $fields ) {
$fields['order']['order_comments']['placeholder'] = 'Enter your placeholder text here.';
$fields['order']['order_comments']['label'] = 'Enter your label here.';
$fields['billing']['billing_phone']['required'] = false;
return $fields;