一个完整php验证码实例程序 -php手册-php.cn

Home

php教程

php手册

一个完整php验证码实例程序

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

May 25, 2016 pm 04:40 PM

php verification code

<!doctype html> 
<html xml:lang="en-us" xmlns="http://www.w3.org/1999/xhtml"> 
<title>login</title> 
<link rel="stylesheet" type="text/css" href="/tryit.css" /> 
<script type="text/javascript"> 
function getpinimg() 
{ 
    document.getelementbyid("pinimg").src="log_demo.php?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  src="/static/imghwm/default1.png"  data-src="log_demo.php?a=pin"  class="lazy"  id="pinimg"  onclick="getpinimg();" / alt="一个完整php验证码实例程序 " >  
 <input type="submit" value="submit"><br /> 
</form> 
</body> 
</html>

log_demo.php代码如下:

<?php
require_once ("log_aux.php");
if ($_get[&#39;a&#39;] == "pin") {
    getpinimg();
    exit;
}
if ($_get[&#39;a&#39;] == "log") {
    $ret = checkpincookie($_get[&#39;pin&#39;], 300);
    if ($ret < 0) { //开源代码phprm.com
        echo "pin error:$ret ";
        exit;
    }
    // check user name and password.
    echo "ok..$ret ";
    if ("123xx" == 123) {
        echo "dddd ";
    }
    echo $_get[&#39;u&#39;];
}
?>

log_aux.php代码如下:

<?php
$magic_a = "www.phprm.com34589";
$magic_b = "234566***+";
function getpincookie($pin_code) {
    global $magic_a;
    global $magic_b;
    $now = time();
    $client_ip = $_server[&#39;remote_addr&#39;];
    $pin = md5($now . $client_ip . $magic_a . $pin_code . $maigc_b) . $now;
    return $pin;
}
function checkpincookie($pin_code_in, $timeout = 300) // 5 miniuteswww.phprm.com
{
    global $magic_a;
    global $magic_b;
    $pin = substr($_cookie[&#39;pin&#39;], 0, 32);
    $time = substr($_cookie[&#39;pin&#39;], 32);
    $now = time();
    if ($now - $time > $timeout) {
        return -100; // time_out
        
    }
    $pin_code_in = strtolower($pin_code_in);
    $client_ip = $_server[&#39;remote_addr&#39;];
    $pin_2 = md5($time . $client_ip . $magic_a . $pin_code_in . $maigc_b);
    if ($pin === $pin_2) {
        return 0;
    } else {
        return -200; // pincode is error.
        
    }
}
function getpinimg() {
    // $rnd = rand(0, 10);
    $rnd = 0;
    $path = "./www.phprm.com/" . substr("00000$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(&#39;#&#39;, $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;
}

永久链接：

转载随意！带上文章地址吧。

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn