<?php

function getnumerics($width,$height,$pos,$distance) {
	if($pos < 1 || $pos > $width*$height) {
        die("Invalid Input");
    }

    $rightPosition  = $pos+$distance;
    $leftPosition   = $pos-$distance;

    for ($i=$pos; $i<=$rightPosition; $i++) {
        for ($j=0; $j<=$distance; $j++) {
            if ($j < $distance && $i < $rightPosition) {
                $arr[$i+($j*$width)] = 0;
            } else {
                $arr[$i+($j*$width)] = 1;
            }
        }
    }

    return $arr;
}