<?phpclassx_axis_labels{functionx_axis_labels(){}functionset_steps($steps){$this->steps=$steps;}//// An array of [x_axis_label or string]//functionset_labels($labels){$this->labels=$labels;}functionset_colour($colour){$this->colour=$colour;}functionset_size($size){$this->size=$size;}functionset_vertical(){$this->rotate="vertical";}}