title: Livechat system with push notifications (php)
body: <p>im developing a dating site, which includes a livechat system where people can chat in private conversations (like facebook chat, or the badoo message system).</p>
  
  <p>What is the best approach for a live chat? I'm thinking about a push system. Do I have to store the chat log in a mysql table, or can I use plain log files for that?</p>
  
  <p>Our servers run PHP 5.3 on CentOS 5.3. Thanks for any tips!</p>