deleting a row

<?php
$path = MODX_CORE_PATH . 'components/pto/';
$result = $modx->addPackage('pto',$path . 'model/','pto_');

$from = $modx->getCollection('Tracker');
// rowcheckbox is the name of my checkboxes, the value of each check box is the row id of the database row I want deleted
$where = "id=" . $_GET['rowcheckbox'];

$modx->db->delete($from,$where);

return true;

<?php
$path = MODX_CORE_PATH . 'components/pto/';
$result = $modx->addPackage('pto',$path . 'model/','pto_');

$removed = $modx->removeObject('Tracker', array('id' => $_GET['rowcheckbox']));

return $removed ? '' : 'There was an error removing row with id ' . $_GET['rowcheckbox'];

<?php
$path = MODX_CORE_PATH . 'components/pto/';
$result = $modx->addPackage('pto',$path . 'model/','pto_');

$id= $_GET['rowcheckbox'];

// I assume that the rowcheckbox post is a SINGLE ID and not an array.. if so, you'll need to wrap this in a for each or something.

// Get the object we want to delete
$obj = $modx->getObject('Tracker',$id);
// Check if we actually retrieved an object to prevent fatal errors
$success = true;
if ($obj instanceof Tracker) {
// if it's the right object, remove it. Will return true or false
  $success = $obj->remove();
}

return $success;