验证码问题求解决
问题：怎样能将图片中的验证码储存起来用于后期的验证？https://www.gxlcms.com/verficode.php 页面 ob_clean();
for($i=0;$i<4;$i++){
$num.=dechex(rand(0,15));
}
$num=substr($num,-4,4);
$nowimage=imagecreate(100,30);
imagecolorallocate($nowimage,240,240,240);
for($i=0;$i
$font=mt_rand(3,5);
$x=mt_rand(1,8)+100*$i/4;
$y=mt_rand(1,50/4);
$color=imagecolorallocate($nowimage,rand(0,150),rand(0,150),rand(0,150));
imagestring($nowimage,$font,$x,$y,$num[$i],$color);
}
for($i=0;$i<200;$i++){
$randcolor=imagecolorallocate($nowimage,rand(200,255),rand(200,255),rand(200,255));
imagesetpixel($nowimage,rand()%70,rand()%20,$randcolor);
}
header("content-type:image/png");
imagepng($nowimage);
imagedestroy($nowimage);
?>
index.php 页面 明日商城 require 'conn/head.php';
?>
用户登录
换一张
require 'conn/foot.php';
?>
------解决思路----------------------保存到SESSION
------解决思路----------------------session 可以
------解决思路----------------------
session_start(); // 開啓session
ob_clean();
for($i=0;$i<4;$i++){
$num.=dechex(rand(0,15));
}
$num=substr($num,-4,4);
$_SESSION['captcha'] = $num; // 把驗證碼寫入session
$nowimage=imagecreate(100,30);
imagecolorallocate($nowimage,240,240,240);
for($i=0;$i$font=mt_rand(3,5);
$x=mt_rand(1,8)+100*$i/4;
$y=mt_rand(1,50/4);
$color=imagecolorallocate($nowimage,rand(0,150),rand(0,150),rand(0,150));
imagestring($nowimage,$font,$x,$y,$num[$i],$color);
}
for($i=0;$i<200;$i++){
$randcolor=imagecolorallocate($nowimage,rand(200,255),rand(200,255),rand(200,255));
imagesetpixel($nowimage,rand()%70,rand()%20,$randcolor);
}
header("content-type:image/png");
imagepng($nowimage);
imagedestroy($nowimage);
?>
加了兩句
session_start();
$_SESSION['captcha'] = $num;
驗證頁面
session_start();
if($captcha == $_SESSION['captcha']){ // $captcha為用戶提交的驗證碼
// pass
}else{
// not match
}
------解决思路----------------------index.php 先于 https://www.gxlcms.com/verficode.php 执行，慢一步是正常的
所以 zf 采用了保存验证码图片的方案
前几天才在这里讨论过，你可找一下
