Capture custom checkout field value in Woocommerce

Question

Im on woocommerce and are trying by snipets, get the value of all fields to send to adroid app with json.

The trouble its, that i cant capture the values of custom fields on check out. I tried by plugin and snippet create the field but, i cant recover the values to send to json

the field was created with that snipet

add_action( 'woocommerce_after_order_notes', 'my_custom_checkout_field' );

function my_custom_checkout_field( $checkout ) {

echo '<div id="my_custom_checkout_field"><h2>' . __('My Field') . '</h2>';

woocommerce_form_field( 'my_field_name', array(
    'type'          => 'text',
    'class'         => array('my-field-class form-row-wide'),
    'label'         => __('Fill in this field'),
    'placeholder'   => __('Enter something'),
    ), $checkout->get_value( 'my_field_name' ));

echo '</div>';

}

when try to create the json with that snipet i can get all standard woo values but i cant get the custom field

function action_woocommerce_order_status_completed( $array ) { 

$order = wc_get_order( $order_id );
$url = 'localhost/wp/recolector.php';

//Initiate cURL.
$ch = curl_init($url);

// now you can get the data from $product array
};

 //The JSON data.
$jsonData = array(
'email' => $order->get_billing_email(),
'first_name'=> $order->get_billing_first_name(),
'last_name' => $order->get_billing_last_name(),
'phone'=>$order->get_billing_phone()(),
'address'=>$order->get_billing_address_1(),
'city'=>$order->get_billing_city(),
'province'=>$order->get_billing_state(),
'country'=>$order->get_billing_country(),
'order'=>$order->get_order_number()
);

//Encode the array into JSON.
$jsonDataEncoded = json_encode($jsonData);

//Tell cURL that we want to send a POST request.
curl_setopt($ch, CURLOPT_POST, 1);

//Attach our encoded JSON string to the POST fields.
curl_setopt($ch, CURLOPT_POSTFIELDS, $jsonDataEncoded);

//Set the content type to application/json
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json')); 

//Execute the request
$result = curl_exec($ch);


};

// add the action
add_action( 'woocommerce_order_status_completed', 'action_woocommerce_order_status_completed', 10, 1 ); 

well how supose can add my_field_name to json?

Thanks for help.

Answer 1

Updated

There are some mistakes and missing things in your code. Try the following instead:

// Display a custom checkout field
add_action( 'woocommerce_after_order_notes', 'my_custom_checkout_field' );
function my_custom_checkout_field( $checkout ) {
    echo '<div id="my_custom_checkout_field"><h2>' . __('My Field') . '</h2>';

    woocommerce_form_field( '_custom_field', array(
        'type'          => 'text',
        'class'         => array('my-custom-field form-row-wide'),
        'label'         => __('Fill in this field'),
        'placeholder'   => __('Enter something'),
        ), $checkout->get_value( '_custom_field' ));

    echo '</div>';
}

// Save the custom checkout field in the order meta
add_action( 'woocommerce_checkout_create_order', 'save_order_custom_meta_data', 10, 2 );
function save_order_custom_meta_data( $order, $data ) {
    if ( isset($_POST['_custom_field']) )
        $order->update_meta_data('_custom_field', sanitize_text_field( $_POST['_custom_field'] ) );
}


add_action( 'woocommerce_order_status_completed', 'action_on_order_status_completed', 10, 2 ); 
function action_on_order_status_completed( $order_id, $order ) { 
    // The order data (array)
    $data = array(
        'email'         => $order->get_billing_email(),
        'first_name'    => $order->get_billing_first_name(),
        'last_name'     => $order->get_billing_last_name(),
        'phone'         => $order->get_billing_phone()(),
        'address'       => $order->get_billing_address_1(),
        'city'          => $order->get_billing_city(),
        'province'      => $order->get_billing_state(),
        'country'       => $order->get_billing_country(),
        'order'         => $order->get_order_number()
    );

    // Get the custom field value (and add it if not empty)
    if( $custom_field = $order->get_meta('_custom_field') ) {
        // Add it to the array
        $data['custom_field'] = $custom_field;
    }

    //Encode the array into JSON.
    $json_data = json_encode( $data ); 

    // The Url
    $url = 'localhost/wp/recolector.php';

    //Initiate cURL.
    $ch = curl_init($url);

    //Tell cURL that we want to send a POST request.
    curl_setopt($ch, CURLOPT_POST, 1);

    //Attach our encoded JSON string to the POST fields.
    curl_setopt($ch, CURLOPT_POSTFIELDS, $jsonDataEncoded);

    //Set the content type to application/json
    curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json')); 

    //Execute the request
    $result = curl_exec($ch);

    // Set the return result in the order as custom meta data (if needed)
    $order->update_meta_data('_curl_result', $result );
    $order->save();
}

It should better work now.