Home > Developer > PHP

A complete PHP Verification code instance program [with demo]

Source: Internet
Author: User
Tags md5 php code php tutorial rand set cookie
Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞
The code is as follows Copy Code

<!doctype HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "http://www.111cn.net/tr/xhtml1/dtd/ Xhtml1-transitional.dtd ">
<title>login</title>
<link rel= "stylesheet" type= "text/css Tutorial" href= "/tryit.css Tutorial"/>
<script type= "text/web Effects" >
function getpinimg ()
{
document.getElementById ("Pinimg"). src= "log_demo.php tutorial? a=pin&r=" + math.random ();
}
</script>

<body>
<form action= "log_demo.php" method= "Get" >
<input type= "hidden" name= "a" value= "log"/>
User:<input type= "text" name= "user" size= "value=" "Test"/><br/><br/>
Password:<input type= "password" name= "pass" size= "" value= "123456"/><br/><br/>
Pincode:<input type= "text" Name= "pin" size= "8" value= ""/>
<input type= "button" value= "Getpin" onclick= "getpinimg ();" >

<input type= "Submit" value= "Submit" ><br/>
</form>
</body>

log_demo.php Code

The code is as follows Copy Code

<?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 Code

The code is as follows Copy Code

<?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 Checkpincookie ($pin _code_in, $timeout =300)//5 miniuteswww.111cn.net
{
 global $magic _a;
 global $magic _b;
  $pin = substr ($_cookie[' pin '), 0, 32);
  $time = substr ($_cookie[' pin '), 32);
  $now = time ();
 if ($now-$time > $timeout) {
  return-100; //time_out
 }
  $pin _cod e_in = Strtolower ($pin _code_in);
  $client _ip = $_server[' remote_addr '];
  $pin _2 = MD5 ($time. $client _ip. $magic _a. $pin _code_in);
 if ($pin = = = $pin _2) {
  return 0;
 } else {
  return-200;//Pincode is Error.
 }
}

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;
}

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
captcha code in php with demo verification code php php demo code jquery examples with code and demo comptia a complete study guide simple php program code php instance

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

What's Trending
Top 10 Tags
datastax versions naming convention zookeeper client class definition md5 microsoft sql server 2005 data structures exception handling error handling
Top 10 Keywords
microsoft download center down wordpress address url site address url wordpress address url windows installer 4 0 download 302 not found web address url definition site address url wordpress db2 integer mac os installation step by step pdf abbreviation for return

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

  • Sales Support

    1 on 1 presale consultation

    Chat Contact Sales

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    Open a Ticket

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

    Learn More