Contact form/PHP Best practices re security

[REELHERO]

Love to know the thoughts on best practices when it comes to form securty via/PHP

I tried two different versions of PHP mailers the first one is pretty secure

 https://pitchlab.net/contact/index_99.html

but I dont like that it redirects to a different page - even if i added a target="blank" it still makes you leave the navigation.. 

I like the way this operates but Im not sure how secure it is to have the PHP be on the same page, including the email in the code, is it opening me up to spam?:

https://pitchlab.net/contact/

thoughts?

[Nancy OShea · Accepted solution]

Already asked & answered in your other post.

PHP is invisible to browsers.