$allContext = $modx->getCollection('modContext');
This question has been answered by BobRay. See the first response.
/* Custom collection loader that forces access policy checking. */
$query = $modx->newQuery('modContext'); $rowCollection = array(); if ($query->prepare() && $query->stmt->execute()) { $rowCollection = $query->stmt->fetchAll(PDO:FETCH_ASSOC); }
PDO:FETCH_ASSOC
Array ( [0] => Array ( [modContext_key] => web [modContext_name] => [modContext_description] => The default front-end context for your web site. [modContext_rank] => 0 ) [1] => Array ( [modContext_key] => mgr [modContext_name] => [modContext_description] => The default manager or administration context for content management activity. [modContext_rank] => 0 ) }