客服电话
APP下载
迪恩网络APP
随时随地掌握行业动态
官方微信
扫描二维码
关注迪恩网络微信公众号
|
//验证码 <?php //实现简单的验证码 //session_start session_start(); //画布 $image = imagecreatetruecolor(100, 30); //设置填充颜色 $bgcolor = imagecolorallocate($image, 255, 255, 255); //填充 imagefill($image, 0, 0, $bgcolor); //随机数据 //session $captcha_code = ''; for ($i = 0; $i < 4; $i++) { $fontsize = 5; $fontcolor = imagecolorallocate($image, mt_rand(0, 120), mt_rand(0, 120), mt_rand(0, 120)); $data = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'; // echo strlen($data); // echo substr($data,61,1); $font = substr($data, mt_rand(0, strlen($data) - 1), 1); $captcha_code .= $font; $width = ($i * 100) / 4 + mt_rand(5, 10); $height = mt_rand(5, 10); //添加 imagestring($image, $fontsize, $width, $height, $font, $fontcolor); } //保存到session $_SESSION['authcode'] = $captcha_code; //干扰 //像素点 for ($i = 0; $i < 200; $i++) { $pixcolor = imagecolorallocate($image, mt_rand(20, 200), mt_rand(20, 200), mt_rand(20, 200)); imagesetpixel($image, mt_rand(0, 99), mt_rand(0, 29), $pixcolor); } //线 for ($i = 0; $i < 4; $i++) { $linecolor = imagecolorallocate($image, mt_rand(50, 220), mt_rand(50, 220), mt_rand(50, 220)); imageline($image, mt_rand(0, 99), mt_rand(0, 29), mt_rand(0, 99), mt_rand(0, 99), $linecolor); } //输出 header('Content-type: image/png'); imagepng($image); //销毁 imagedestroy($image); //验证表单 <?php if (isset($_REQUEST['authcode'])) { session_start(); //判断 if (strtolower($_REQUEST['authcode'] == strtolower($_SESSION['authcode']))) { echo '恭喜你输入正确！'; } else { echo '输入失败！'; } exit(); } ?> <html> <head> <title>验证码提交</title> </head> <body> <form action="./form.php" method="post"> <p>验证码：<img src="./code01.php" ></p> <a href="javascript:void(0)" onclick="document.getElementById('captcha_img').src='./code01.php?r='+Math.random()">看不清?</a> <p> <label for="authcode">请输入图片中的内容: </label> <input type="text" name="authcode" /> </p> <p><input type="submit" value="submit"/></p> </form> </body> </html>
|
2022-08-30
2022-08-17
2022-11-06
2022-08-18
2022-07-30
krishnaik06/Machine-Learning-in-90-days
微信订餐很火，各大小餐厅也盲目跟风，但是有太多的商家闲着不用，为什么，因为都是些
armancodv/building-energy-model-matlab: It is a small software which is develope
在美元的英文“dollar”里面明明没有字母“s”，为什么美元的符号($)是一条竖线穿过字
The Import any XML or CSV File to WordPress plugin before 3.6.8 accepts all zip
FGRibreau/import-tweets-to-mastodon: How to import tweets to mastodon (e.g. http
tboronczyk/localization-middleware: PSR-15 middleware to assist primarily with l
长沙城南，有一所以“环保”为名的学校，从1979年创立以来，四易归属、五更其名。 这
台山市属于广东省江门市。首先，感谢您打开这份来自台山的邀请函，这是一封特殊的邀请
heinrichreimer/material-intro: A simple material design app intro with cool anim
请发表评论