title: Extract Relevant Tag/Keywords from Text block
body: <p>I wanted a particular implementation, such that the user provide a block of text like:</p>
  
  <blockquote>
    <p>"Requirements
    - Working knowledge, on LAMP Environment using Linux, Apache 2,
    MySQL 5 and PHP 5,
    - Knowledge of Web 2.0 Standards
    - Comfortable with JSON
    - Hands on Experience on working with Frameworks, Zend, OOPs
    - Cross Browser Javascripting, JQuery etc.
    - Knowledge of Version Control Software such as sub-version will be
    preferable."</p>
  </blockquote>
  
  <p>What I want to do is automatically select relevant keywords and create tags/keywords, hence for the above piece of text, relevant tags should be: <strong>mysql, php, json, jquery, version control, oop, web2.0, javascript</strong></p>
  
  <p>How can I go about doing it in PHP/Javascript etc? A headstart would be really helpful.</p>