Best method for exact match in array with PHP?

This is an old website post. New post address: https://www.pisciottablog.com/2018/03/25/best-method-for-exact-match-in-array/ +++ This wordpress.com domain will not be kept up-to-date anymore+ +++ Please, use the new one (pisciottablog.com) ++++++++++++++++++ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++   During a job interview one asked me: "how would you search for a word inside a very long array?"....