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Joomla Back End MVC Step by Step Tutorial - Part 9: After add save and edit function, now, we add delete function at back-end. For this job, we just edit controller.

Open "controller.php". Add remove function like this:

function remove()
  {
  	global $option;
	
	$db =& JFactory::getDBO();
	
	$cid = JRequest::getVar( 'cid' , array() , '' , 'array' );
	JArrayHelper::toInteger($cid);

	if (count( $cid )) {
		$cids = implode( ',', $cid );
		$query = 'DELETE FROM #__hello'
		. ' WHERE id IN ( '. $cids .' )';
		
		$db->setQuery( $query );
		if (!$db->query()) {
			echo "<script> alert('".$db->getErrorMsg(true)."'); window.history.go(-1); </script>\n";
		}
	}	
	
	$this->setRedirect ( 'index.php?option=' .$option );
  }