一個完整php驗證碼執行個體程式[帶demo]

最後更新：2017-01-13 來源：互聯網

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代碼如下

複製代碼

<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.111cn.net/tr/xhtml1/dtd/xhtml1-transitional.dtd">
<html lang="en-us" xml:lang="en-us" xmlns="http://www.w3.org/1999/xhtml">
<title>login</title>
<link rel="stylesheet" type="text/css教程" href="/tryit.css教程" />
<script type="text/網頁特效">
function getpinimg()
{
document.getelementbyid("pinimg").src="log_demo.php教程?a=pin&r=" + math.random();
}
</script>
</head>

<body>
<form action="log_demo.php" method="get">
<input type="hidden" name="a" value="log" />
user:<input type="text" name="user" size="20" value="test" /><br /><br />
password:<input type="password" name="pass" size="12" value="123456" /><br /><br />
pincode:<input type="text" name="pin" size="8" value="" />
<input type="button" value="getpin" onclick="getpinimg();">
<img id="pinimg" src="log_demo.php?a=pin" onclick="getpinimg();" />
<input type="submit" value="submit"><br />
</form>
</body>
</html>

log_demo.php代碼

代碼如下

複製代碼

<?php
require_once("log_aux.php");

if ($_get['a'] == "pin") {
getpinimg();
exit;
}

if ($_get['a'] == "log") {
$ret = checkpincookie($_get['pin'], 300);
if ($ret < 0) {
  echo "pin error:$ret ";
  exit;
}
// check user name and password.
echo "ok..$ret ";
if ("123xx" == 123) {
  echo "dddd ";
}
echo $_get['u'];
}

log_aux.php代碼

代碼如下

複製代碼

<?php
$magic_a = "www.111cn.net34589";
$magic_b = "234566***+";

function getpincookie($pin_code)
{
global $magic_a;
global $magic_b;
$now = time();
$client_ip = $_server['remote_addr'];
$pin = md5($now . $client_ip . $magic_a . $pin_code . $maigc_b) . $now;
return $pin;
}

function getpinimg()
{
// $rnd = rand(0, 10);
$rnd = 0;
$path = "./www.111cn.net/" . substr("00000$rnd", -4);
for ($i = 0; $i < 4; ++$i) {
  if (__getpinimg($path)) {
   break;
  }
}
exit;
}

function __getpinimg($path)
{
require("$path/pinmap.php");
$pinv = $pin[rand(0, $pin_max)];
list ($file, $pin_code) = explode('#', $pinv);
$filepath = "$path/$file$pin_ext";

// output pincode image.
$fh = fopen($filepath, "rb");
if (!$fh) {
return false;
}
$data = fread($fh, 10240); // php just read max size: 8k.
fclose($fh);

if (strlen($data) < 200) {
return false;
}
// set cookie;
header("content-type: image/jpeg");
$pin_code = strtolower($pin_code);
$pin = getpincookie($pin_code);
setcookie("pin", $pin);

echo $data;
return true;
}

本文章原先以中文撰寫並發佈於 aliyun.com，亦設英文版本，僅作資訊用途。本網站不對文章的準確性，完整性或可靠性或其任何翻譯作出任何明示或暗示的陳述或保證。如對該文章有任何疑慮或投訴，請傳送電郵至 info-contact@alibabacloud.com 並提供相關疑慮或投訴的詳細說明。職員會於 5 個工作天內與您聯絡，一經驗證之後，即會刪除該侵權內容。

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