title: How does php and apache handle multiple requests?
body: <p>How does PHP handle multiple requests from users? Does it process them all at once or one at a time waiting for the first request to complete and then moving to the next.</p>
  
  <p>Actually, I'm adding a bit of wiki to a static site where users will be able to edit addresses of businesses if they find them inaccurate or if they can be improved. Only registered users may do so. When a user edits a business name, that name along with it's other occurrences is changed in different rows in the table. I'm a little worried about what would happend if 10 users were doing this simultaneously. It'd be a real mishmash of things. So does PHP do things one at time in order received per script (update.php) or all at once.</p>