修改thinkphp3.1.3验证码图片的代码

“static function buildImageVerify($length=4, $mode=1, $type='png', $width=80, $height=30, $verifyName='verify') {

        import('ORG.Util.String');

        $randval = String::randString($length, $mode);

        session($verifyName, md5($randval));

        $width = ($length * 10 + 10) > $width ? $length * 10 + 10 : $width;

$fontcolor=C('fontcolor');

        if ($type != 'gif' && function_exists('imagecreatetruecolor')) {

            $im = imagecreatetruecolor($width, $height);

        } else {

            $im = imagecreate($width, $height);

        }

        $r = Array(225, 255, 255, 223);

        $g = Array(225, 236, 237, 255);

        $b = Array(225, 236, 166, 125);

        $key = mt_rand(0, 3);

        $backColor = imagecolorallocate($im, $r[$key], $g[$key], $b[$key]);    //背景色（随机）  www.111com.net

        $borderColor = imagecolorallocate($im, 255, 255, 255);                    //边框色

        imagefilledrectangle($im, 0, 0, $width - 1, $height - 1, $backColor);//着色

        imagerectangle($im, 0, 0, $width - 1, $height - 1, $borderColor);

        $stringColor = imagecolorallocate($im, mt_rand(0, 200), mt_rand(0, 120), mt_rand(0, 120));

        // 干扰

        for ($i = 0; $i < C('grunm'); $i++) {

$color = imagecolorallocate($im,mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));

imagesetthickness($im,2);

imageline($im,mt_rand(0,$width),mt_rand(0,$height),mt_rand(0,$width),mt_rand(0,$height),$color);

        }

        for ($i = 0; $i < 25; $i++) {

            imagesetpixel($im, mt_rand(0, $width), mt_rand(0, $height), $stringColor);

        }

//字体显示的位置和颜色

        for ($i = 0; $i < $length; $i++) {

imagestring($im,50,$i*10+20,8,$randval{$i},$fontcolor);

        }

//www.111com.net 雪花

for ($i=0;$i

$color = imagecolorallocate($im,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255));

imagestring($im,mt_rand(1,5),mt_rand(0,$width-1),mt_rand(0,$height-1),mt_rand(1,9),$color);

}

        Image::output($im, $type);

    }