title: Stop php re-proccess all when hit refresh
body: <p>I'm here again with high traffic problems, i'm having a problem with "Sleep" thread on Mysql, after searching a lot i'm on my way to solve this problem.</p>
  
  <p>I make sure db connection is killed after the use, i solve part of the problem, now when my code go to right path he just open few sleep thread and close fast, but i still having problem with "Sleep" threads, i observe and get lots of sleep when i hit f5 multiple times and it do all the proccess again, and the same user enter on competition.</p>
  
  <p>So i've think about it and maybe got a solution, but don't know to apply.</p>
  
  <p>I think if the user HIT f5, i just kill all proccess that same user request last time and starting over again, or just don't start again just give the result from the last time. I can't block "f5", so if i press f5 many times he just put sleep until the timeout kill it becouse i think zend can't manage that connection becouse the code is gone.</p>
  
  <p>Im right?</p>
  
  <p>Sorry about my english, and appreciate any help.</p>
  
  <p>Thanks</p>