code: public function routeExec()
      {
  
          // If no controller was found by routeFind()...
          if (!isset($this->controllerPath)) {
              $this->debug('routeExec: No controllerPath set. Routing to 404.');
              $this->error('404');
              exit;
          }
  
          // Grab method arguments from the URL.
          if (isset($this->methodArgs)) {
              $methodArgs = $this->methodArgs;
          }
          else {
              if ($this->collectionIDGiven) {
                  $methodArgs = $this->partialPathArray($this->controllerOffset+1, 1);
              }
              else {
                  $methodArgs = $this->partialPathArray($this->controllerOffset+2);
              }
  
              // Remove the last item from arguments if empty.
              $lastItem = count($methodArgs)-1;
              if (isset($methodArgs[$lastItem]) && $methodArgs[$lastItem] == '') {
                  array_pop($methodArgs);
              }
  
              // If no arguments are set then make empty array.
              if (empty($methodArgs) || $methodArgs[0] == '') {
                  $methodArgs = array();
              }
              else {
                  // Sanitize arguments.
                  $input = new Input($methodArgs);
                  $methodArgs = $input->getData();
              }
          }
  
          /** Maps an array of arguments derived from the URL into a method with a comma
           *  delimited list of parameters. Calls the method.
           *
           *  I.E. If the URL is:
           *  'www.mySite.com/MyController/FooBar/Param1/Param2/Param3'
           *
           *  And the FooBar method within MyController is defined as:
           *  public function FooBar($a, $b, $c) {}
           *
           *  $a will have the value 'Param1'
           *  $b will have the value 'Param2'  ... and so forth.
           */
          call_user_func_array(array($this->controller, $this->method), $methodArgs);
  
      }
docs: Uses the info generated by routeFind() to then create an instance of the
  appropriate controller and call the desired method.