private function createCode()
    {
        $fontsize = 140;
        for($i=0;$i < $this->number;$i++){
            //设置字体大小  
            //设置字体颜色，随机颜色
            $fontcolor = imagecolorallocate($this->image, rand(0,120),rand(0,120), rand(0,120));      //0-120深颜色
            //设置数字
            $fontcontent = $this->createNumber();
            //10>.=连续定义变量
            $this->captcha_code .= $fontcontent;
            //设置坐标
            $x = ($i*100/4)+rand(5,10);
            $y = rand(5,10);
            imagestring($this->image,$fontsize,$x,$y,$fontcontent,$fontcolor);
        }
        $this->setSession()->disturb();
    }
private function createCode()
    {
        $fontsize = 140;
        for($i=0;$i < $this->number;$i++){
            //设置字体大小  
            //设置字体颜色，随机颜色
            $fontcolor = imagecolorallocate($this->image, rand(0,120),rand(0,120), rand(0,120));      //0-120深颜色
            //设置数字
            $fontcontent = $this->createNumber();
            //10>.=连续定义变量
            $this->captcha_code .= $fontcontent;
            //设置坐标
            $x = ($i*100/4)+rand(5,10);
            $y = rand(5,10);
            imagestring($this->image,$fontsize,$x,$y,$fontcontent,$fontcolor);
        }
        $this->setSession()->disturb();
    }
@name 设置数字