- array_push: documentation ( source)
- print_r: documentation ( source)
<?php
$a = array(
array(1, 2, 3),
array(4, 5, 6),
array(7, 8, 9),
array(10, 11, 12)
);
array_push($a, array(1, 1, 1));
// or
$a[] = array(1, 1, 1);
echo '<pre>';
print_r($a);