请问怎样自动登录网页，只需要输入一次用户名和密码网页是用php写的

第一次登陆的时候去数据库验证一下，如果用户名密码正确，你就写一个Cookie到计算机里面，如果用户再登入就试图从Cookie里面把用户名密码取出来与数据库进行比对，如果正确，则直接让登入，这样就可以了，那么在用户那里，只会看到是自动登陆的。

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建议用cookie ,第一次登陆把用户名密码写到里边,下次在登陆先检测一下cookie是否存在这个用户
请问该怎么写呢？我是初学者，对php不熟，能给一段源码吗？我要改的是一套邮件系统的代码和一个聊天工具，我想将两个东西发到同一个网页，当在邮件的登录界面中输入用户名和密码之后，让系统记录用户名和密码，同时让一个聊天软件的web页也同时登录，（用户名和密码全都相同），但他们是两个不同软件的

邮件系统的登录页代码如下：
<?php
require_once('lib/htmlHeader.inc');
require_once('../kmslibs/KmsSessionMgr.inc');
require_once('login.inc');
header("Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0");
header("Expires: Thu, 19 Nov 1981 08:52:00 GMT");
header("Pragma: no-cache");
$sx = & new sy();
$l = $sx->tm(true);
if (!is_null($l)) {
$tn = ($l->getWebComponent() == KMS_WEBCOMPONENTWEBMAIL ? '/default/index.php' : '/express/index.php');
header('Location: ' . $tn);
exit;
}
if (!$bk) $bk = "<kerio:text id='login-enter'/>";
$ace = explode(",", $_SERVER["HTTP_ACCEPT_LANGUAGE"]);
$ti = strtolower(substr(trim($ace[0]), 0, 2));
if (!$ti) $ti = "en";
header("Content-Type: text/html; charset=utf-8");
header("Content-Language: $ti");
header("X-Kerio-Filter: translate=$ti");
$alt = new cx('', array('login.css'));
$alt->dsr(SERVER_SOFTWARE . ' WebMail');
$alt->alv(array(DOCTYPE, TITLE, FAVICON, CSSFILES));
$epg = epg();
$epp = false;
require_once('browser.inc');
$bl = new bm();
$cgi = $bl->bo() . $bl->aop();
switch ($cgi) {
case 'msie7':
$epp = $cgi;
$epq = 336;
break;
case 'firefox20':
$epp = $cgi;
$epq = 234;
break;
}
?>
<meta name="viewport" content="width = 320" />
<script type="text/javascript">

</script>
</head>
<body onload="epr()">
<div id='upSpacer'></div>
<form name="ach" action="dologin.php" method="post" style="margin:0">
<input name="bop" type="hidden" value="internal">
<div class='contentDiv'>
<table class="mainTable" align="center">
<tr><td colspan="2">
<div class='logoDiv'></div>
<div id="logoText" class="caption">WebMail Mini</div><br></td></tr>
<?php
if (!is_null($_GET['reason'])) {
switch ($_GET['reason']) {
case "failure":
$act = "<kerio:text id='login-err-failure'/>";
break;
case "expired":
$act = "<kerio:text id='login-err-expired'/>";
break;
case "logout":
$act = "<kerio:text id='login-err-logout'/>";
break;
default:
$act = "";
break;
}
}
if (strlen($act) > 0) {
echo "<tr><td colspan=\"2\"><span class=\"error\">" . $act . "<br><br></span></td></tr>";
}
?>
<tr><td colspan="2">
<?php echo $bk; ?><br> 
</td></tr>
<tr><td nowrap><span class="caption"><kerio:text id='login-username'/></span></td><td>
<input name="kerio_username" class="input_text" type="text" size="15">
<?php if ($_GET['mode'] == "pda"):?>
<input name="dui" type="hidden" value="yes">
<?php endif;?>
</td></tr>
<tr><td nowrap><span class="caption"><kerio:text id='login-password'/></span></td><td>
<input name="kerio_password" type="password" size="15" class="input_text"></td></tr>
<tr>
<td colspan="2"><div id="modeSelection"></div></td>
</tr>
<tr>
<td> </td><td><input type="submit" class="input_button" value="<kerio:text id='login-submit'/>"></td>
</tr>
</table>
</form>
</div>
<?php if ($epp): ?>
<div id="hint"></div>
<?php endif ?>
</body>
</html>
聊天软件的代码如下：<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>SparkWeb</title>
<script src="AC_OETags.js" type="text/javascript"></script>
<style>
body { margin: 0px; overflow:hidden }
</style>
<script type="text/javascript">
    var mw_flashMovieId = "SparkWeb"; // the id/name of your flash app's HTML DOM element
    var mw_flashContainerId = "container"; // the id/name of the flash element's surrounding div element
</script>
<script type="text/javascript">

</script>
</head><script type="text/javascript">
function jive_sparkweb_getConfig()
{
return {
server: "igniterealtime.org",
connectionType: "socket",
port: "5222",
autoLogin: "false"
};
}
</script>
<script type="text/javascript">
    // Copyright 2007 www.flexcapacitor.com, www.drumbeatinsight.com
    // Version 1.0.0

    // global array of html elements
    htmlControls = new Array();

    var timer;
    var titleStr;
    var nicknameStr;
    var bodyStr;
    var flashPlayer;


// add HTML element to the page
    function addChild(o) {
     if (o.type=="division") {
     addChildDivision(o);
     }
     else if (o.type=="iframe") {
     addChildIFrame(o);
     }
    }

    function detectFlashPlayer(){
    try {
     if(navigator.appName.indexOf("Microsoft") != -1){
     flashPlayer = window.SparkWeb;
     }
     else {
     flashPlayer = window.document.SparkWeb;
     }
    }
     catch(e){
     alert(e);
     }
    }

    window.onblur = function() {
     if(flashPlayer != null && flashPlayer.setFocused){
flashPlayer.setFocused(false);
}
};

window.onfocus = function() {
if(flashPlayer != null && flashPlayer.setFocused){
flashPlayer.setFocused(true);
}
};

function isReady(){
return true;
}


    // add iframe to the page
    function addChildIFrame(o) {

     if (getElement(o.id)) {
// do nothing for now
     }

var newElement = document.createElement("iframe");
newElement.id = o.id;
newElement.name = o.name;
newElement.movieId = o.movieId;
newElement.width = o.width;
newElement.height = o.height;
newElement.frameBorder = o.frameborder;
newElement.style.position = o.position;
setSize(newElement,o.width,o.height);
moveElementTo(newElement,o.x,o.y);
//newElement.style.backgroundColor = "transparent";
// always 0px - do not add a border to the iframe itself
// add a child div and add a border to that or add border in mxml
newElement.style.border = o.border;
newElement.src = o.source;

//  use innerHTML or DOM element creation methods to put content into body
document.body.appendChild(newElement);

newElement.onload = new function() {
// set a flag so the application knows the page is loaded
// looking for a reliable method that works cross browser
}
    }

    // add division to the page
    function addChildDivision(o) {
var newElement = document.createElement("div");
newElement.id = o.id;
newElement.name = o.name;
newElement.movieId = o.movieId;

newElement.style.position = o.position;
setSize(newElement,o.width,o.height);
moveElementTo(newElement,o.x,o.y);
newElement.style.backgroundColor = "#" + o.backgroundColor;
newElement.style.padding = "0px";
newElement.style.margin = "0px";
// always 0px - do not add a border to the container div tag
// add a border in mxml or add a child div tag in the htmlText property and add a border to that
newElement.style.border = o.border;
newElement.innerHTML = o.htmlText;

document.body.appendChild(newElement);
setScrollPolicyById(o.id, o.htmlScrollPolicy);

addToGlobalArray(newElement, o.type);
    }

// add to associative array
function addToGlobalArray(el, elementType) {
var newElement = new Object();
newElement.element = el;
newElement.id = el.id;
newElement.loaded = false;
newElement.type = elementType;
htmlControls[el.id] = newElement;
}

// gets the element by name
function getElement(id) {
if (htmlControls[id]) {
return htmlControls[id].element;
}
return document.getElementById(id);
}

function appendMessage(id, message){
try {
var f = getElement(id);
var p = f.contentWindow.document;
       window[id].appendMessage(message);
}
catch(err){
setTimeout('appendMessage("+id+", "+message+")', 3000);
}
}

function isReady(id){
try {
var f = getElement(id);
var p = f.contentWindow.document;
       return window[id].isReady();
}
catch(err){
}
return false;
}

function changeTitle(title){
window.document.title = title;
clearTimeout(timer);
}

function alertTitle(title, username){
clearTimeout(timer);
window.document.title = title;
titleStr = title;
nicknameStr = username;
timer = setTimeout("showNickname()", 1000);
}

function showNickname(){
window.document.title = nicknameStr;
timer = setTimeout("showTitle()", 1000);
}

function showTitle(){
window.document.title = titleStr;
timer = setTimeout("showNickname()", 1000);
}

function showBody(){
window.document.title = bodyStr;
timer = setTimeout("showTitle()", 1000);
}

function refreshPage(){
window.location.reload( false );
}

// cannot get height of pages loaded from different domains
// ie, page is hosted at www.yoursite.com and you load www.google.com will fail with return value of -1
// works in ff and ie. not tested in mac browsers -
function getElementHeight(id){
var el = getElement(id);
moz = (document.getElementById && !document.all);

if (el){

// check the height value
try {

/*** return div height ***/
if (el.nodeName.toLowerCase()=="div") {
var scrollHeight = el.scrollHeight;
var divHeight = el.style.height;
divHeight = (scrollHeight > parseInt(divHeight)) ? scrollHeight : divHeight;
return divHeight;
}

/*** return iframe height ***/
//moz
if (moz) {
return el.contentDocument.body.scrollHeight;
}
else if (el.Document) {
return el.Document.body.scrollHeight;
}
}
catch(e)
{
//An error is raised if the IFrame domain != its container's domain
//alert('Error: ' + e.number + '; ' + e.description+'\nPossibly - Cannot access because page domain does not equal container domain');
return -1;
}
}
} // get property value
function getElementValue(id, elProperty){

// if periods are in the name assume absolute path
// otherwise assume element id
if (id.indexOf('.')!=-1) {
var newArr = id.split('.');
var elValue = "";

try {
el = window;
for (var i=0;i < newArr.length;i++) {
el = el[newArr[i]];
}
return el;
}
catch (e) {
//alert("Whoooops!! Cant find " + elId);
// should return null or undefined here
return -1;
}
}
else {
// try and get property value
try {
var el = getElement(id);
var elValue = el[elProperty];
return elValue;
}
catch(e) {
//alert("Error: Can't find " + elId + "." + elProperty);
// should return null or undefined here
return -1;
}
}
}

// get HTML content
function getHTML(id, elementType) {
var el = getElement(id);
if (el!=null) {

if (elementType =="division") {
return el.innerHTML;
}
}
return "";
} // get reference to the flash movie
function getMovieById(id) {
if (navigator.appName.indexOf ("Microsoft") !=-1) {
return window[id];
} else {
return window.document[id];
}
}

// hide element by name
// set height of content to 0px so the
// flash context menu appears in the right location
function hide(id, hideOffscreen, offscreenOffset) {
var el = getElement(id);
if (hideOffscreen) {
el.style.width = "0px";
el.style.height = "0px";
}
el.style.visibility = "hidden";
}

// move element to new location
function moveElementTo(el,x,y) {
el.style.left = parseInt(x) + "px";
el.style.top = parseInt(y) + "px";
}

// forces redraw
function refresh(id) {
var el = getElement(id);
el.style.cssText = el.style.cssText;
}

function removeEle(id){
var olddiv = getElement(id);
   document.body.removeChild(olddiv);
}

// remove
function remove(id) {
hide(id, true);
var el = getElement(id);
//el = undefined; // not sure how to delete
}

// set document title
    function setDocumentTitle(title) {
        window.document.title = title;
        return 1;
    }

// set HTML content
function setHTML(id, htmlText, elementType) {
var el = getElement(id);
if (el!=null) {

if (elementType =="division") {
el.innerHTML = htmlText;
}
}
}

// set position
function setPosition(id,x,y) {
var el = getElement(id); // LEFT
if (x != undefined) {
el.style.left = x + "px";
}
// TOP
if (y != undefined) {
//alert(y)
el.style.top = y + "px";
}
}

// set scroll policy of element
function setScrollPolicy(el, overflow) {
if (overflow != "resize") {
el.style.overflow = overflow;
COOKIE 可以的，从客户端取COOKIE内容，判断两个WEB对登陆状态的判定条件一致就可以了

请问怎样自动登录网页，只需要输入一次用户名和密码 网页是用php写的

解决方案 »

请问怎样自动登录网页，只需要输入一次用户名和密码网页是用php写的