Jacob Kinglisten, your site isn't going to code itself

Consider the following 2-dimensional array:

[a][b][c][d][e]
[f][g][h][i][j]
[k][l][m][n][o]
[p][q][r][s][t]

I've come up with a PHP function to rotate this array by 90, 180, or 270 degrees.

function rotate($array, $degrees){
	if ($degrees != 90 && $degrees != -90 && $degrees != 180) {
		return $array;
	}
 
	$newArray = array();
 
	$i = 0;
	$arrsize = sizeof($array) - 1;
 
	while ($array[0][0]) {
		$newArrayRow = array();
 
		if ($degrees == 180) {
			$row = array_pop($array);
 
			while ($row[0]) {
				$newArrayRow[] = array_pop($row);
			}
			$newArray[] = $newArrayRow;
		} else {
			for ($j = $arrsize; $j >= 0; $j--) {
 
				if ($degrees == 90) {
					array_push( $newArrayRow, array_shift( $array[$j] ) );
				} else {
					array_unshift( $newArrayRow, array_shift( $array[$j] ) );
				}
 
			}
			$i++;
 
			if ($degrees == 90) {
				array_push($newArray, $newArrayRow);
			} else {
				array_unshift($newArray, $newArrayRow);
			}
		}
	}
	return $newArray;
}

The results:

rotate($oldArray, 90) returns:

[p][k][f][a]
[q][l][g][b]
[r][m][h][c]
[s][n][i][d]
[t][o][j][e]

rotate($oldArray, -90) returns:

[e][j][o][t]
[d][i][n][s]
[c][h][m][r]
[b][g][l][q]
[a][f][k][p]

rotate($oldArray, 180) returns:

[t][s][r][q][p]
[o][n][m][l][k]
[j][i][h][g][f]
[e][d][c][b][a]

In general, why would you need to rotate a 2-dimensional array?

1. Image manipulation
2. Game logic

The second reason in that list is why I need to rotate an array. Stay tuned...