Bresenham lines w/o diagonal movement

Question

Is there a modified Bresenham algorithm, where the step from one pixel to the next one isn't allowed to be diagonally, just horizontally or vertically? Or any other algorithm which does that? (PHP preferred)

Right:
0 0 0 1
0 0 1 1
0 1 1 0
1 1 0 0

Wrong:
0 0 0 1
0 0 1 0
0 1 0 0
1 0 0 0