- print_r: documentation ( source)
<?php
$placementPerCampaign = array(0=> array('placement_id' => '123', 'placement_name' => '123 N'), 1=> array('placement_id' => '456', 'placement_name' => '456 N'));
foreach ($placementPerCampaign as $placement) {
$placementList[] = array('id' => $placement['placement_id'],
'name' =>$placement['placement_name']);
}
print_r($placementList);