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I have a matrix and I need to know how to do the foreach and know the total size of the matrix.

$matriz = array();

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

1 answer

3


To walk the array, which is multidimensional, it is also necessary to cover the subarrays:

$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";
    }
}

To know the total of items, you can use the count, but because it is a array multidimensional, use count together with the array_map, so will return the amount of items that each subarray has, to add them, use the array_sum:

echo "Total: " . array_sum(array_map("count", $matriz)) . "\n"; // 4

See DEMO

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