How to add extra "Local Pickup" fields for shipping methods in WooCommerce?

This post is helpful if you want to add extra options on "Local Pickup" shipping methods. You must add this code on your functions.php file.

<?php
// Custom function that handle your settings
function carrier_settings(){
    return array(
        'targeted_methods' => array('local_pickup:9','local_pickup:4'), // Your targeted shipping method(s) in this array
        'field_id'         => 'carrier_name', // Field Id
        'field_type'       => 'select', // Field type
        'field_label'      => '', // Leave an empty value if the first option has a text (see below).
        'label_name'       => __("Pickup location and time:","woocommerce"), // for validation and as meta key for orders
        'field_options'    => array(
             // The option displayed at first ( or keep an empty value '',)
            __("Choose a local pickup and time", "woocommerce"),
            // The carrier companies below (one by line)
            'Local pickup 1 — 12h-18h',
            'Local pickup 2 — 12h-18h',
            'Local pickup 3 — 12h-18h',
            'Local pickup 4 — 12h-18h',
        ),
    );
}

// Display the custom checkout field
add_action( 'woocommerce_after_shipping_rate', 'carrier_company_custom_select_field', 20, 2 );
function carrier_company_custom_select_field( $method, $index ) {
    extract( carrier_settings() ); // Load settings and convert them in variables

    $chosen  = WC()->session->get('chosen_shipping_methods'); // The chosen methods
    $value   = WC()->session->get($field_id);
    $value   = WC()->session->__isset($field_id) ? $value : WC()->checkout->get_value('_'.$field_id);
    $options = array(); // Initializing

    if( ! empty($chosen) && $method->id === $chosen[$index] && in_array($method->id, $targeted_methods)  ) {
        echo '<div class="custom-carrier">';

        // Loop through field otions to add the correct keys
        foreach( $field_options as $key => $option_value ) {
            $option_key = $key == 0 ? '' : $key;
            $options[$option_key] = $option_value;
        }

        woocommerce_form_field( $field_id, array(
            'type'     => $field_type,
            'label'    => '', // Not required if the first option has a text.
            'class'    => array('form-row-wide ' . $field_id . '-' . $field_type ),
            'required' => true,
            'options'  => $options,
        ), $value );

        echo '</div>';
    }
}

<?php
// jQuery code (client side) - Ajax sender
add_action( 'wp_footer', 'carrier_company_script_js' );
function carrier_company_script_js() {
    // Only cart & checkout pages
    if( is_cart() || ( is_checkout() && ! is_wc_endpoint_url() ) ):

    // Load settings and convert them in variables
    extract( carrier_settings() );

    $js_variable = is_cart() ? 'wc_cart_params' : 'wc_checkout_params';

    // jQuery Ajax code
    ?>
    <script type="text/javascript">
    jQuery( function($){
        if (typeof <?php echo $js_variable; ?> === 'undefined')
            return false;

        $(document.body).on( 'change', 'select#<?php echo $field_id; ?>', function(){
            var value = $(this).val();
            $.ajax({
                type: 'POST',
                url: <?php echo $js_variable; ?>.ajax_url,
                data: {
                    'action': 'carrier_name',
                    'value': value
                },
                success: function (result) {
                    console.log(result); // Only for testing (to be removed)
                }
            });
        });
    });
    </script>
    <?php
    endif;
}

// The Wordpress Ajax PHP receiver
add_action( 'wp_ajax_carrier_name', 'set_carrier_company_name' );
add_action( 'wp_ajax_nopriv_carrier_name', 'set_carrier_company_name' );
function set_carrier_company_name() {
    if ( isset($_POST['value']) ){
        // Load settings and convert them in variables
        extract( carrier_settings() );

        if( empty($_POST['value']) ) {
            $value = 0;
            $label = 'Empty';
        } else {
            $value = $label = esc_attr( $_POST['value'] );
        }

        // Update session variable
        WC()->session->set( $field_id, $value );

        // Send back the data to javascript (json encoded)
        echo $label . ' | ' . $field_options[$value];
        die();
    }
}

// Conditional function for validation
function has_carrier_field(){
    $settings = carrier_settings();
    return array_intersect(WC()->session->get( 'chosen_shipping_methods' ), $settings['targeted_methods']);
}

// Validate the custom selection field
add_action('woocommerce_checkout_process', 'carrier_company_checkout_validation');
function carrier_company_checkout_validation() {
    // Load settings and convert them in variables
    extract( carrier_settings() );

    if( has_carrier_field() && isset( $_POST[$field_id] ) && empty( $_POST[$field_id] ) )
        wc_add_notice(
            sprintf( __("Please select a %s as it is a required field.","woocommerce"),
            '<strong>' . $label_name . '</strong>'
        ), "error" );
}

// Save custom field as order meta data
add_action( 'woocommerce_checkout_create_order', 'save_carrier_company_as_order_meta', 30, 1 );
function save_carrier_company_as_order_meta( $order ) {
    // Load settings and convert them in variables
    extract( carrier_settings() );

    if( has_carrier_field() && isset( $_POST[$field_id] ) && ! empty( $_POST[$field_id] ) ) {
        $order->update_meta_data( '_'.$field_id, $field_options[esc_attr($_POST[$field_id])] );
        WC()->session->__unset( $field_id ); // remove session variable
    }
}

// Display custom field in admin order pages
add_action( 'woocommerce_admin_order_data_after_shipping_address', 'admin_order_display_carrier_company', 30, 1 );
function admin_order_display_carrier_company( $order ) {
    // Load settings and convert them in variables
    extract( carrier_settings() );

    $carrier = $order->get_meta( '_'.$field_id ); // Get carrier company

    if( ! empty($carrier) ) {
        // Display
        echo '<p><strong>' . $label_name . '</strong>: ' . $carrier . '</p>';
    }
}

Display carrier company after shipping line everywhere (orders and emails)

// Display carrier company after shipping line everywhere (orders and emails)
add_filter( 'woocommerce_get_order_item_totals', 'display_carrier_company_on_order_item_totals', 1000, 3 );
function display_carrier_company_on_order_item_totals( $total_rows, $order, $tax_display ){
    // Load settings and convert them in variables
    extract( carrier_settings() );

    $carrier = $order->get_meta( '_'.$field_id ); // Get carrier company

    if( ! empty($carrier) ) {
        $new_total_rows = [];

        // Loop through order total rows
        foreach( $total_rows as $key => $values ) {
            $new_total_rows[$key] = $values;

            // Inserting the carrier company under shipping method
            if( $key === 'shipping' ) {
                $new_total_rows[$field_id] = array(
                    'label' => $label_name,
                    'value' => $carrier,
                );
            }
        }
        return $new_total_rows;
    }
    return $total_rows;
}

Source: https://stackoverflow.com/questions/63191513/extra-carrier-field-for-shipping-methods-in-woocommerce-cart-and-checkout

---

Hide delivery section on checkout page, if the user chooses a "local pickup"

<?php
function disable_delivery_section_on_checkout_form( $available_gateways ) {

   // Part 1: Hide shipping based on the static choice @ Cart

   $chosen_methods = WC()->session->get( 'chosen_shipping_methods' );
   $chosen_shipping = $chosen_methods[0];
   if ( 0 === strpos( $chosen_shipping, 'local_pickup' ) ) {
   ?>
      <script type="text/javascript">
         jQuery('.woocommerce-shipping-fields').fadeOut();
      </script>
   <?php
   }

   // Part 2: Hide shipping based on the dynamic choice @ Checkout

   ?>
      <script type="text/javascript">
         jQuery('form.checkout').on('change','input[name^="shipping_method"]',function() {
            var val = jQuery( this ).val();
            if (val.match("^local_pickup")) {
                     jQuery('.woocommerce-shipping-fields').fadeOut();
               } else {
               jQuery('.woocommerce-shipping-fields').fadeIn();
            }
         });
      </script>
   <?php
}

add_action( 'woocommerce_after_checkout_form', 'disable_delivery_section_on_checkout_form' );