欢迎进入Linux社区论坛,与200万技术人员互动交流 >>进入 header ("Content-type: image/jpeg"); $code=imagejpeg($this-im); }elseif (function_exists("imagegif")) { header("Content-type: image/gif"); $code=imagegif($this-im); } imagedestroy($this
欢迎进入Linux社区论坛,与200万技术人员互动交流 >>进入
header ("Content-type: image/jpeg");
$code=imagejpeg($this->im);
}elseif (function_exists("imagegif"))
{
header("Content-type: image/gif");
$code=imagegif($this->im);
}
imagedestroy($this->im);
return $code;
}
/**
* 检查验证码
* @param $code
* @return bool
*/
public function checkCode($code) {
session_start();
$secode=explode(',', $_SESSION['initphp_code']);
$time=time();
//检查时间是否过期
if($secode[0]>$time||$time-$secode[0]>$this->time)
{
return false;
}
//验证码密钥 双md5 后是否一致
if($secode[1]md5(md5($code.'initphpYzmsy'.$secode[0]))){
return false;
}
//检查验证码字符串是否一致
if($code||$code$secode[2])
{
return false;
}
return true;
}
/*随机扭曲*/
public function setWarping(){
$rgb=array();
$direct=rand(0,1);
$width = imagesx($this->im);
$height = imagesy($this->im);
$level=$width /20;
for($j = 0;$j
for($i = 0;$i
$rgb[$i] = imagecolorat($this->im, $i , $j);
}
for($i = 0;$i
$r = sin($j / $height * 2 * M_PI - M_PI * 0.5) * ($direct ? $level : -$level);
imagesetpixel($this->im, $i + $r , $j , $rgb[$i]);
}
}
}
}
?>
效果:
[1] [2]