title: Subtract seconds from a specific given time PHP
body: <p>I writing a code for subtract seconds from a time using php. i have date which assigned to variable , i need to subtract seconds from that date.</p>
  
  <pre><code>$date="2014-03-16 17:40:27";
  echo date("Y-m-d H:i:s", strtotime($date) - strtotime("-600 seconds"));
  </code></pre>
  
  <p>but this gives me dates on 1970S, i search everhere and didn't found a answer which matched for my question. can anyone help me to fix this little code</p>