Graph::ParsePosition PHP Method

    protected function ParsePosition($pos, $w = 0, $h = 0, $pad = 0)
    {
        $inner = true;
        $parts = preg_split('/\\s+/', $pos);
        if (count($parts)) {
            // if 'outer' is found after 'inner', it takes precedence
            $parts = array_reverse($parts);
            $inner_at = array_search('inner', $parts);
            $outer_at = array_search('outer', $parts);
            if ($outer_at !== false && ($inner_at === false || $inner_at < $outer_at)) {
                $inner = false;
            }
        }
        if ($inner) {
            $t = $this->pad_top;
            $l = $this->pad_left;
            $b = $this->height - $this->pad_bottom;
            $r = $this->width - $this->pad_right;
            // make sure it fits to keep RelativePosition happy
            if ($w > $r - $l) {
                $w = $r - $l;
            }
            if ($h > $b - $t) {
                $h = $b - $t;
            }
        } else {
            $t = $l = 0;
            $b = $this->height;
            $r = $this->width;
        }
        // ParsePosition is always inside canvas or graph
        $pos .= ' inside';
        return Graph::RelativePosition($pos, $t, $l, $b, $r, $w, $h, $pad);
    }