Please enter a whole number ... <br />
<b>Fatal error</b>:  Uncaught Error: Undefined constant &quot;STDIN&quot; in /var/www/html/ace-builds/demo/kitchen-sink/docs/php.php:13
Stack trace:
#0 {main}
  thrown in <b>/var/www/html/ace-builds/demo/kitchen-sink/docs/php.php</b> on line <b>13</b><br />