Triggering PHP Exception

<?php
  //creating a function containing a potential exception
  function checkNumber($number) {
    if($number > 1) {
      throw new Exception('The value has to be 1 or lower');
    }
    return true;
  }

  //triggering the exception inside a try()
  try {
    checkNumber(2);
    //In case the exception gets thrown, this is the message that is shown.
    echo 'The value is 1 or lower';
  } catch(Exception $e) {
    //catching the exception
    echo 'Message: ' .$e->getMessage();
  }
?>