生成SESSION loginok.php<?php session_start();if($_GET['action'] == "logout"){ unset($_SESSION['username']); unset($_SESSION['userid']); exit('注销成功!<a href="javascript:history.back(-1);">点击返回</a>'); } if(isset($_POST['submit']) == ""){ exit('非法访问!!'); } $username= htmlspecialchars(trim($_POST['username']));$pwd = MD5(trim($_POST['pwd']));include('conn.php');$mql="select userid from users where username ='$username' and pwd='$pwd' limit 1"; $check_user =mysql_query($mql,$conn); if($result =mysql_fetch_array($check_user)){ $_SESSION['username']= $username; $_SESSION['userid'] = $result['$userid']; echo $username.',欢迎到来!<a href="my.php">用户中心</a><br/>'; echo '<a href="index.php">点击进入主页</a>'; exit();}else{ echo '登陆失败!点击<a href="javascript:history.back(-1);">返回</a>'; } ?>[code=php
判断index.php<?php session_start();if(! isset($_SESSION['userid'])){ echo "<a href='login.php'>登陆</a> <a href='zhuce.html'>注册</a>";}else{ $username =$_SESSION['username']; echo $username.",欢迎到来<a href='loginok.php?action=logout'>注销</a>"; echo $_SESSION['userid']; echo "<a href='login.php'>登陆</a> <a href='zhuce.html'>注册</a>";} [/code]两个文件放在同一目录下登陆后在loginok.php生成session但跳转到index.php后,无论如何都只显示登陆注册PHPsession
判断index.php<?php session_start();if(! isset($_SESSION['userid'])){ echo "<a href='login.php'>登陆</a> <a href='zhuce.html'>注册</a>";}else{ $username =$_SESSION['username']; echo $username.",欢迎到来<a href='loginok.php?action=logout'>注销</a>"; echo $_SESSION['userid']; echo "<a href='login.php'>登陆</a> <a href='zhuce.html'>注册</a>";} [/code]两个文件放在同一目录下登陆后在loginok.php生成session但跳转到index.php后,无论如何都只显示登陆注册PHPsession
生成SESSION loginok.php
<?php session_start();if($_GET['action'] == "logout"){
unset($_SESSION['username']);
unset($_SESSION['userid']);
exit('注销成功!<a href="javascript:history.back(-1);">点击返回</a>');
}if(isset($_POST['submit']) == ""){
exit('非法访问!!');
}$username= htmlspecialchars(trim($_POST['username']));
$pwd = MD5(trim($_POST['pwd']));include('conn.php');$mql="select userid from users where username ='$username' and pwd='$pwd' limit 1"; $check_user =mysql_query($mql,$conn);
if($result =mysql_fetch_array($check_user)){
$_SESSION['username']= $username;
$_SESSION['userid'] = $result['$userid'];
echo $username.',欢迎到来!<a href="my.php">用户中心</a><br/>';
echo '<a href="index.php">点击进入主页</a>';
exit();
}else{
echo '登陆失败!点击<a href="javascript:history.back(-1);">返回</a>';
}?>判断index.php
<?php session_start();
var_dump($_SESSION['userid']);
if(! isset($_SESSION['userid'])){
echo "<a href='login.php'>登陆</a> <a href='zhuce.html'>注册</a>";
}else{
$username =$_SESSION['username'];
echo $username.",欢迎到来<a href='loginok.php?action=logout'>注销</a>";
echo $_SESSION['userid'];
echo "<a href='login.php'>登陆</a> <a href='zhuce.html'>注册</a>";
}
两个文件放在同一目录下登陆后在loginok.php生成session但跳转到index.php后,无论如何都只显示登陆注册