woocommerce_email_editor_send_preview_email_after_wp_mail │ action-hook │ WC 1.0

Usage

add_action( 'woocommerce_email_editor_send_preview_email_after_wp_mail', 'wp_kama_woocommerce_email_editor_send_preview_after_wp_mail_action', 10, 4 );

/**
 * Function for `woocommerce_email_editor_send_preview_email_after_wp_mail` action-hook.
 * 
 * @param  $to      
 * @param  $subject 
 * @param  $body    
 * @param  $result  
 *
 * @return void
 */
function wp_kama_woocommerce_email_editor_send_preview_after_wp_mail_action( $to, $subject, $body, $result ){

	// action...
}

$to

-

$subject

-

$body

-

$result

-

Where the hook is called

do_action( 'woocommerce_email_editor_send_preview_email_after_wp_mail', $to, $subject, $body, $result );

Where the hook is used in WooCommerce

add_action( 'woocommerce_email_editor_send_preview_email_after_wp_mail', array( $this, 'send_preview_email_after_wp_mail' ), 10 );