title: How to execute string php code to run
body: <p>I have got string response is <code>"&lt;?php  $a=array("10","20");  echo $a[0]+a[1];   ?&gt;"</code></p>
  
  <p>How to execute this string.
  I use PHP 7.0.</p>
  
  <p>Please give any solution.</p>