 for($i = 0; $i $_md_color = imagecolorallocate($_img,mt_rand(0, 255),mt_rand(0, 255), mt_rand(0, 255)); - imageline($_img, mt_rand(0, 75), mt_rand(0, 75), mt_rand(0, 75), mt_rand(0, 75),$_md_color);
- }
- //随机雪花
- for($i = 0; $i $_md_color = imagecolorallocate($_img, mt_rand(200, 255), mt_rand(200, 255), mt_rand(200, 255));
- imagestring($_img, 1, mt_rand(1, $_width), mt_rand(1, $_height), '*', $_md_color);
- }
- //黑色边框
- $_black = imagecolorallocate($_img, 0, 0, 0);
- imagerectangle($_img, 0, 0, $_width-1, $_height-1, $_black);
- //输出验证码
- for($i = 0;$i $_mt_color = imagecolorallocate($_img, mt_rand(0, 100), mt_rand(0, 150), mt_rand(0, 200));
- imagestring($_img, mt_rand(3, 5), $i*$_width/4+mt_rand(1, 10), mt_rand(1, $_height/2), $_SESSION['code'][$i],$_mt_color);
- }
- header('Content-Type:image/png');
- imagepng($_img);
- //销毁
- imagedestroy($_img);
- ?>
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