title: check more than one string in strtotime
body: <p>I have this code to check if the mysql timestamp is 24 hours old, it works for one string however I need to check two strings but i'm not sure how to add it in</p>
  
  <pre><code>if(strtotime($dateFrom." + 24 hours") &lt;= strtotime("now"))
  </code></pre>
  
  <p>for example i'd like to add the string in</p>
  
  <pre><code>if(strtotime($dateFrom **&amp;&amp; $dateTo.**" + 24 hours") &lt;= strtotime("now"))
  </code></pre>