Add bcc email on WooCommerce notifications

functions.php

<?php

/*
 * ajouter une autre adresse email sur les commandes et factures
 * source : http://stackoverflow.com/questions/19810625/additional-recipients-on-woocommerce-invoice/21350340
 */
 
add_filter( 'woocommerce_email_headers', 'add_bcc_to_wc_admin_new_order', 10, 3 );
function add_bcc_to_wc_admin_new_order( $headers = '', $id = '', $wc_email = array() ) {
    if ( $id == 'new_order' ) {
        $headers .= "Bcc: my_personal@email.com\r\n"; // replace my_personal@email.com with your email
    }
    return $headers;
}