php 验证码
![](https://images2015.cnblogs.com/blog/1064046/201701/1064046-20170103143537612-880685189.png)
$im =imagecreate(500,500); $bak =imagecolorallocate($im,200,100,0); $shk = imagecolorallocate($im,0,122,33); imagefill($im,0,0,$bak); $zimb = "abcdefghijklmnopqrstuvwxyz"; $str = rand(0,9).$zimb[rand(0,25)].rand(0,9).$zimb[rand(0,25)].$zimb[rand(0,25)]; //$str1 = strval($str); //$str1 = $str1.$str; //$str2= rand('a','z'); imageline($im,20,20,100,100,$shk); for($i=0;$i<250;$i++) { imagesetpixel($im,$i+100,15*sin($i/15)+100,$shk); imagesetpixel($im,$i+100,15*cos($i/15)+100,$shk); } imageline($im,100,100,350,100,$shk); //imagettftext($im,3,50,150,150,$shk,'arial.ttf',$str); imagestring($im,5,200,200,$str,$shk); imagepng($im); imagedestroy($im);
一个验证码的实现,还没有 除重
posted on 2017-01-03 14:37 Heart&ware 阅读(94) 评论(0) 编辑 收藏 举报