ive written a plugin (its just a php file in folder in the plugins folder) tht is supposed to send some info to flask app, but at the moment nothng is happening when i do a test order usin g a 100% coupon code, also hen i ctivte the plugin i get the error: The plugin generated 1 character of unexpected output during activation. If you notice “ headers already sent ” messages, problems with syndication feeds or other issues, try deactivating or removing this plugin. what am i doing wrong <?php /* Plugin Name: woopostreq Description: Custom actions for WooCommerce. Version: 1.0 Author: callum */ add_action( 'woocommerce_payment_complete', 'so_payment_complete' ); function so_payment_complete( $order_id ){ $order = wc_get_order( $order_id ); $billing_email = $order->get_billing_email(); $billing_phone = $order->get_billing_phone(); $order_date = $order->get_date_paid(); $url = 'http://blanked out/woocommercepost'; // Add 'http://' to the URL // Prepare the data for the request $data = array( 'orderid' => $order_id, 'billingemail' => $billing_email, 'billingphone' => $billing_phone, 'orderdate' => $order_date ); // Post the request wp_remote_post( $url, array( 'method' => 'POST', 'timeout' => 45, 'redirection' => 5, 'httpversion' => '1.0', 'blocking' => true, 'headers' => array(), 'body' => $data // Pass data using 'body' parameter )); }