How to preview email templates of Woocommerce

I ended up creating a small function which is executed via the admin-ajax.php script, e.g.

https://example.org/wp-admin/admin-ajax.php?action=previewemail&file=emails/customer-processing-order.php&order=180

The function:

• sets the global $order variable to the order with the id specified in the order parameter
• load the email template specified in the file parameter.

This is the code (you must add it a new plug-in or in some existing php):

/** * Open a preview e-mail. * * @return null */function preview_email(){    global $order;    $filename = $_GET['file'];    $orderId  = $_GET['order'];    $order    = new WC_Order($orderId);    include $filename;    return null;}add_action('wp_ajax_previewemail', 'preview_email');    

Modified version of the above answer using built in woo functions. The benefit is that it will look in both your theme and the default plugins template path.

/** * Open a preview e-mail. * * @return null */function previewEmail() {    if (is_admin()) {        $default_path = WC()->plugin_path() . '/templates/';        $files = scandir($default_path . 'emails');        $exclude = array( '.', '..', 'email-header.php', 'email-footer.php','plain' );        $list = array_diff($files,$exclude);        ?><form method="get" action="<?php echo site_url(); ?>/wp-admin/admin-ajax.php"><input type="hidden" name="order" value="2055"><input type="hidden" name="action" value="previewemail">        <select name="file">        <?php        foreach( $list as $item ){ ?>            <option value="<?php echo $item; ?>"><?php echo str_replace('.php', '', $item); ?></option>        <?php } ?>        </select><input type="submit" value="Go"></form><?php        global $order;        $order = new WC_Order($_GET['order']);        wc_get_template( 'emails/email-header.php', array( 'order' => $order ) );        wc_get_template( 'emails/'.$_GET['file'], array( 'order' => $order ) );        wc_get_template( 'emails/email-footer.php', array( 'order' => $order ) );    }    return null; }add_action('wp_ajax_previewemail', 'previewEmail');

I've come up with a solution(plugin) that may fit your needs, although it only works with the default available email-templates this is due to the nature of how WooCommerce is managing emails. Github

WordPress Repo