Allow me to shoot a few scare tactics your way since scare tactics appear to be what compels some people to take how to fix hacked wordpress site a bit more seriously, or at least start thinking about the issue.
Truth is, if your website is targeted by a competent master of this script, there is no way. Everything you are about to read below are some actions you can take to quickly minimize the risk to an acceptable degree. If your WordPress site is protected odds are find here a hacker would prefer picking simpler victim, another.
It's a WordPress plugin. They are drop dead simple to install, have all the features you need for a task such as this, and are relatively inexpensive, especially when compared to having to hire someone to have this done check my site for you.
BACK UP your website and keep a copy on your own computer and off-site storage. For those who have a website that is very active, back. You spend a lot of time and money on your site, do not skip this! The one complete solution that does it all is BackupBuddy, no back up your documents, widgets, database and plugins. Need to move your site to another server, this will do it!
Change your password, or at least admin username and your WordPress password and collect and use other WordPress security tips to keep hackers out!