title: PHP: how to add double quote to a PHP variable
body: <p>When i echo "$time"; - The output is 2015-07-27 18:17:47
  But i need to output as "2015-07-27 18:17:47". </p>
  
  <p>I have been trying various string concatenations such as : echo "."$time"."; But couldn't get the desired output? What is the best way to do it?</p>