- print_r: documentation ( source)
<?php
$arr = array();
$arr[1] = array('p' => 3, 'id' => 4);
$arr[2] = array('p' => 2, 'id' => 3);
$arr[3] = array('p' => 1, 'id' => 2);
$arr[4] = array('p' => 0, 'id' => 1);
foreach($arr as $ind => $itm)
{
print_r($itm);
echo('<br>');
}