source: code/Website/php-ofc-library/ofc_x_axis.php

<?php

class x_axis
{
        function x_axis(){}

        /**
         * @param $stroke as integer, with of the line and ticks
         */
        function set_stroke( $stroke )
        {
                $this->stroke = $stroke;        
        }
        
        function stroke( $stroke )
        {
                $this->set_stroke( $stroke );
                return $this;
        }
        
        /**
         *@param $colour as string HEX colour
         *@param $grid_colour as string HEX colour
         */
        function set_colours( $colour, $grid_colour )
        {
                $this->set_colour( $colour );
                $this->set_grid_colour( $grid_colour );
        }
        
        /**
         *@param $colour as string HEX colour
         */
        function set_colour( $colour )
        {
                $this->colour = $colour;        
        }
        
        function colour( $colour )
        {
                $this->set_colour($colour);
                return $this;
        }
        
        function set_tick_height( $height )
        {
                $tmp = 'tick-height';
                $this->$tmp                     = $height;
        }
        
        function tick_height( $height )
        {
                $this->set_tick_height($height);
                return $this;
        }
        
        function set_grid_colour( $colour )
        {
                $tmp = 'grid-colour';
                $this->$tmp = $colour;
        }
        
        function grid_colour( $colour )
        {
                $this->set_grid_colour($colour);
                return $this;
        }
        
        /**
         * @param $o is a boolean. If true, the X axis start half a step in
         * This defaults to True
         */
        function set_offset( $o )
        {
                $this->offset = $o?true:false;  
        }
        
        function offset( $o )
        {
                $this->set_offset($o);
                return $this;
        }
        
        /**
         * @param $steps as integer. Which grid lines and ticks are visible.
         */
        function set_steps( $steps )
        {
                $this->steps = $steps;
        }
        
        function steps( $steps )
        {
                $this->set_steps($steps);
                return $this;
        }
        
        /**
         * @param $val as an integer, the height in pixels of the 3D bar. Mostly
         * used for the 3D bar chart.
         */
        function set_3d( $val )
        {
                $tmp = '3d';
                $this->$tmp                             = $val;         
        }
        
        /**
         * @param $x_axis_labels as an x_axis_labels object
         * Use this to customize the labels (colour, font, etc...)
         */
        function set_labels( $x_axis_labels )
        {
                //$this->labels = $v;
                $this->labels = $x_axis_labels;
        }
        
        /**
         * Sugar syntax: helper function to make the examples simpler.
         * @param $a is an array of labels
         */
        function set_labels_from_array( $a )
        {
                $x_axis_labels = new x_axis_labels();
                $x_axis_labels->set_labels( $a );
                $this->labels = $x_axis_labels;
                
                if( isset( $this->steps ) )
                        $x_axis_labels->set_steps( $this->steps );
        }
        
        /**
         * min and max.
         */
        function set_range( $min, $max )
        {
                $this->min = $min;
                $this->max = $max;
        }
}