title: Parse error: syntax error, unexpected T_LNUMBER
body: <p>i have this error: "Parse error: syntax error, unexpected T_LNUMBER in line 14 " i would like to calculate difference between two dates</p>
  
  <pre><code>function datedifference()
  {
     $res=dbconnect()-&gt;exec("SELECT DATEDIFF("2017-06-25", "2017-06-15");");
  
     echo $res;
  }
  </code></pre>