This article shares an example of a verification code that I use. From generating image verification codes to using verification code examples, students who need to learn can refer to this article.
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| 代码如下 |
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/*
图片验证码 Powered By KASON
*/
session_start();
$num=4;//验证码个数
$width=80;//验证码宽度
$height=20;//验证码高度
$code=' ';
for($i=0;$i<$num;$i++)//生成验证码
{
switch(rand(0,2))
{
case 0:$code[$i]=chr(rand(48,57));break;//数字
case 1:$code[$i]=chr(rand(65,90));break;//大写字母
case 2:$code[$i]=chr(rand(97,122));break;//小写字母
}
}
$_SESSION["VerifyCode"]=$code;
$image=imagecreate($width,$height);
imagecolorallocate($image,255,255,255);
for($i=0;$i<80;$i++)//生成干扰像素
{
$dis_color=imagecolorallocate($image,rand(0,2555),rand(0,255),rand(0,255));
imagesetpixel($image,rand(1,$width),rand(1,$height),$dis_color);
}
for($i=0;$i<$num;$i++)//打印字符到图像
{
$char_color=imagecolorallocate($image,rand(0,2555),rand(0,255),rand(0,255));
imagechar($image,60,($width/$num)*$i,rand(0,5),$code[$i],$char_color);
}
header("Content-type:image/png");
imagepng($image);//输出图像到浏览器
imagedestroy($image);//释放资源
?> |
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The verifycode.php file code is as follows
The checkcode.php file is as follows
The code is as follows
| 代码如下 |
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ini_set('display_errors', 'Off');
session_start();
if((strtoupper($_POST["code"])) == strtoupper(($_SESSION["VerifyCode"]))){
print("验证码正确,");
}else{
print("验证码错误,");
}
echo "提交的验证码:".strtoupper($_POST["code"]).",正确的验证码：".strtoupper($_SESSION["VerifyCode"]);
?>
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ini_set('display_errors', 'Off');
session_start();
if((strtoupper($_POST["code"])) == strtoupper(($_SESSION["VerifyCode"]))){
print("Verification code is correct,");
}else{
Print("Verification code error,");
}
echo "Submitted verification code:".strtoupper($_POST["code"]).", correct verification code: ".strtoupper($_SESSION["VerifyCode"]);
?>
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