Blackbird Theme. Redirect to home page if a link does not exist.

Hello
I want to redirect to homepage instead of displaying the "page not found message". How do I do that in the blackbird theme?

 

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Can I just replace all the text in the 404.php file with the following or is that not recommended?
Will it revert if I udate the theme?

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

Thanks in advance.

 

Hello,

Such issue is not occurring at our side, So it is not possible for us to provide any solution to you without your detail.
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