title: Only allow English characters/letters/numbers and a few special characters
body: <p>My problem is that I am making a small search engine from scratch, but it gets messed up if I search in Russian/any other language besides English. I was hoping some one could give me a code with regex that could filter out (not just detect, automaticallt filter out) Russian letters, or any other letters except the English letters, and keyboard special characters (-/:;()$&amp;@". - etc).
  Later on, I will implement different language support for my engine, but for now, I want to finish the base of the engine.</p>
  
  <p>Thanks in advance.</p>