- array_map: documentation ( source)
- print_r: documentation ( source)
- array_fill: documentation ( source)
- range: documentation ( source)
<?php
$m = 3;
$n = 4;
$x = array_map(
function () use ($m) { return array_fill(0, $m, 0); },
range(1, $n)
);
print_r($x);