$underscore = "_";

for($i = -180; $i < 181; $i = $i+5)
{
    $j = $i+5;
    
    if(($x >= -180) && ($x < -175) && ($y >= $i) && ($y < $i+5 ))

    {

	$k++;

		$x1 = "substr($i, 1, 3)";
		$x2 = "substr($i, 1, 3)";
		$y1 = substr($i, 1, 3);
		$y2= substr($j, 1, 3);

	# attempting to name array according to value range

		$array = "array$underscore$x1$underscore$x2$underscore$y1$underscore$y2";

		$count = $count +1;

		$array[$k] = ($count);

		print "$array[$k]";