title: PHP script for adding friends
body: <p>Well I'm trying for last 5 days to create simple register, confirm, login PHP script, which is for assignment at UNI, but thing which I'm trying for last 5 days and it's not working is adding friends into friend list. Kid a like Facebook but much much simpler, it's for Android game we got as group assignment.</p>
  
  <p>I have one <code>TABLE users</code> where I have fields <code>ID, username, password, email, friends</code>.</p>
  
  <p>Into field friends I would like to save multiple values as ID's of your friends. To retrieve in game some of user information. </p>
  
  <p>This db and tables are on MySQL and <code>INSERT</code> or <code>UPDATE</code> are not working for me, <code>INSERT</code> is creating new record and can't insert only to one column of existing record and <code>UPDATE</code> can't just insert value but will delete old one and insert new one in. </p>