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@wjch
Forked from jackey/controller.php
Created April 26, 2014 08:14
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public function action_authcode() {
//随机生成一个4位数的数字验证码
$num="";
for($i=0;$i<4;$i++){
$num .= rand(0,9);
}
//4位验证码也可以用rand(1000,9999)直接生成
//将生成的验证码写入session,备验证页面使用
SESSION::put("authcode", $num);
//创建图片,定义颜色值
Header("Content-type: image/PNG");
srand((double)microtime()*1000000);
$im = imagecreate(60,20);
$black = ImageColorAllocate($im, 0,0,0);
$gray = ImageColorAllocate($im, 200,200,200);
imagefill($im,0,0,$gray);
//随机绘制两条虚线,起干扰作用
$style = array($black, $black, $black, $black, $black, $gray, $gray, $gray, $gray, $gray);
imagesetstyle($im, $style);
$y1=rand(0,20);
$y2=rand(0,20);
$y3=rand(0,20);
$y4=rand(0,20);
imageline($im, 0, $y1, 60, $y3, IMG_COLOR_STYLED);
imageline($im, 0, $y2, 60, $y4, IMG_COLOR_STYLED);
//在画布上随机生成大量黑点,起干扰作用;
for($i=0;$i<80;$i++)
{
imagesetpixel($im, rand(0,60), rand(0,20), $black);
}
//将四个数字随机显示在画布上,字符的水平间距和位置都按一定波动范围随机生成
$strx=rand(3,8);
for($i=0;$i<4;$i++){
$strpos=rand(1,6);
imagestring($im,5,$strx,$strpos, substr($num,$i,1), $black);
$strx+=rand(8,12);
}
ImagePNG($im);
ImageDestroy($im);
}
@wjch
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wjch commented Apr 26, 2014

<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
    <title>Weibo</title>
    <meta name="viewport" content="width=device-width">
    {{ HTML::style('laravel/css/style.css') }}
</head>
<body>
    <img src="/home/authcode" />
</body>
</html>
$session_code = SESSION::get("authcode");

@wjch
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wjch commented Apr 26, 2014

<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
    <title>Weibo</title>
    <meta name="viewport" content="width=device-width">
    {{ HTML::style('laravel/css/style.css') }}
</head>
<body>
    <img src="/home/authcode" />
</body>
</html>
$session_code = SESSION::get("authcode");

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