I am new to this and also a new 19 year old PHP developer that just got hired so I am  unsure as to how this works.  Many companies when developing their websites keep their sites hidden from being indexed.  What are some ways html5/css and then php/mysql work is hidden from search engines? If I am not wrong, these are the techniques: Offline development: using local storage to render html/css; not sure how PHP/mysql would work with that. Using .htaccess to prevent accessUsing VPN to prevent access.
How do companies keep websites hidden when in development?
web development;programming practices;deployment