Chunk

<?php

$max = array('x' => 250, 'y' => 250);
$min = array('x' => 20,  'y' => 20);

$chunkX = 1;
$chunkY = 1;

for ($x = 0; $x < 16; $x++) {
    for ($y = 0; $y < 16; $y++) {
        $blockX = $x + $chunkX * 16;
        $blockY = $y + $chunkY * 16;
        if (($blockX > $min['x'] && $blockY < $max['x']) &&
            ($blockY > $min['y'] && $blockY < $max['y']))
        {
            echo "1 ";
        }else {
            echo "0 ";
        }

    }
    echo PHP_EOL;
}

?>