php - Adding a foreach loop inside another array -

i have following array built:

$arr['ticket']['custom_fields'][]   =   array('id'=>$key,'value'=>$value); 

i want dump contents of array inside following section, rather stating each index such $arr['ticket']['custom_fields'][0]. when try each loop, fails using var_dump or var_export? ideas on how might this?

$create = json_encode(array('ticket' => array('subject' => $arr['z_subject'],  'comment' => array( "body"=> $arr['z_description']), 'requester' => array('name' => $arr['z_name'], 'email' => $arr['z_requester']),  'custom_fields' => array(**$arr['ticket']['custom_fields'][]**))));