How to redirect 404 to homepage in wordpress

Want to redirect 404 error page to your homepage in wordpress? Here is how

Login to your wordpress admin page http://website.com/wp-admin/
Go to “Apperarance” -> “Editor” -> 404.php

If your theme doesnt have 404.php page, create one under your theme directory wp-content/themes/themename/

Change or create your 404.php code to these

<?php
header("HTTP/1.1 301 Moved Permanently");
header("Location: ".get_bloginfo('url'));
exit(); ?>

What those code does is to tell browswer that page has moved permantly with 301 error code, then redirect to your home page.