搞了两天，没有弄成，宣布失败，求高手帮忙！

<br><?php   <br />class RoundedCorner {  <br>    private $_r;  <br>    private $_g;  <br>    private $_b;  <br>    private $_image_path;  <br>    private $_radius;  <br>      <br>   function __construct($image_path, $radius, $r = 255, $g = 255, $b = 255) {   <br>        $this-&gt;_image_path = $image_path;  <br>        $this-&gt;_radius = $radius;  <br>        $this-&gt;_r = (int)$r;  <br>        $this-&gt;_g = (int)$g;  <br>        $this-&gt;_b = (int)$b;  <br>    }  <br>      <br>    private function _get_lt_rounder_corner() {  <br>        $radius = $this-&gt;_radius;  <br>        $img = imagecreatetruecolor($radius, $radius);  <br>        $bgcolor = imagecolorallocate($img, $this-&gt;_r, $this-&gt;_g, $this-&gt;_b);  <br>        $fgcolor = imagecolorallocate($img, 0, 0, 0);  <br>        imagefill($img, 0, 0, $bgcolor);  <br>        imagefilledarc($img, $radius, $radius, $radius*2, $radius*2, 180, 270, $fgcolor, IMG_ARC_PIE);  <br>        imagecolortransparent($img, $fgcolor);  <br>        return $img;  <br>    }  <br>      <br>    private function _load_source_image() {  <br>        $ext = substr($this-&gt;_image_path, strrpos($this-&gt;_image_path, '.'));  <br>        if (empty($ext)) {  <br>            return false;     <div class="clear"></div>