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A complete PHP Verification code instance program [with demo]

Source: Internet
Author: User
Keywords Web Programming PHP Tutorials
Tags client code css tutorial data echo exit function html
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HTML Invoke PHP Tutorial Verification Code Program

<!doctype HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.jzread.com/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 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>
</head>

<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 ();" >
<img id= "pinimg" src= "Log_demo.php?a=pin" onclick= "getpinimg" (); "/>
<input type= "Submit" value= "Submit" ><br/>
</form>
</body>
</html>
log_demo.php 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: $RETN";
Exit;
}
Check user name and password.
echo OK ... $retn ";
if ("123xx" = 123) {
echo "DDDDN";
}
echo $_get[' u '];
}
log_aux.php Code

<?php
$magic _a = "www.jzread.com34589";
$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.jzread.com
{
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
}
$pin _code_in = strtolower ($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;
$path = "./www.jzread.com/". substr ("00000$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 ethically 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.

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