<?php

$matriz = array();

$matriz[0][1] = '01';
$matriz[0][2] = '02';
$matriz[1][1] = '11';
$matriz[1][2] = '12';

foreach ($matriz as $itens) {
	foreach ($itens as $item) {
		echo $item . "\n";
	}
}

echo "Total: " . array_sum(array_map("count", $matriz)) . "\n";