My husband knows how.
Some of his questions are:
Is the site developed in raw php? If not, are you using any sort of web application framework for it? An example of the type of framework I'm referring to would be cakephp or laravel.
Are you using anything for version control? (e.g. github, svn)
He can help and he knows php, css, and html
His email is
jspenc72@gmail.com if you would like to get in touch
Thank you