title: Building interactive WHERE clause for Postgresql queries from PHP
body: <p>I'm using Postgresql 9.2 and PHP 5.5 on Linux. I have a database with "patient" records in it, and I'm displaying the records on a web page. That works fine, but now I need to add interactive filters so it will display only certain types of records depending on what filters the user engages, something like having 10 checkboxes from which I build an ad-hoc WHERE clause based off of that information and then rerun the query in realtime. I'm a bit unclear how to do that.</p>
  
  <p>How would one approach this using PHP?</p>