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php cookie 登录验证示例代码

2018-12-30 PHP 前端之家

前端之家收集整理的这篇文章主要介绍了php cookie 登录验证示例代码，前端之家小编觉得挺不错的，现在分享给大家，也给大家做个参考。

<div class="codetitle"><a style="CURSOR: pointer" data="92354" class="copybut" id="copybut92354" onclick="doCopy('code92354')"> 代码如下:

<div class="codebody" id="code92354">

Login@H_<a href="https://www.jb51.cc/tag/403/" target="_blank" class="keywords">403</a>_8@ <BR><<a href="https://www.jb51.cc/tag/Meta/" target="_blank" class="keywords">Meta</a> http-equiv="Content-Type" content="text/html; charset=gb2312"> <BR></head> <body> <BR><form name="form1" method="post" action="login.<a href="https://www.jb51.cc/tag/PHP/" target="_blank" class="keywords">PHP</a>"> <BR><table width="300" border="0" align="center" cellpadding="2" cellspacing="2"> <BR><tr> <BR><td width="150"><div align="right"><a href="https://www.jb51.cc/tag/yonghuming/" target="_blank" class="keywords">用户名</a>：</div></td> <BR><td width="150"><input type="text" name="username"></td> <BR></tr> <BR><tr> <BR><td><div align="right">密码：</div></td> <BR><td><input type="password" name="passcode"></td> <BR></tr> <BR><tr> <BR><td><div align="right">Cookie保存时间：</div></td> <BR><td><select name="cookie" id="cookie"> <BR><option value="0" selected>浏览器进程</option> <BR><option value="1">保存1天</option> <BR><option value="2">保存30天</option> <BR><option value="3">保存365天</option> <BR></select></td> <BR></tr> <BR></table> <BR><p align="center"> <BR><input type="submit" name="Submit" value="Submit"> <BR><input type="reset" name="Reset" value="Reset"> <BR></p> <BR></form> <BR></body> <BR></html> <BR></div><BR><div class="codetitle"><span><a style="CURSOR: pointer" data="84069" class="copybut" id="copybut84069" onclick="doCopy('code84069')"><U></U></a> <a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>如下:</div><div class="codebody" id="code84069"><BR><?<a href="https://www.jb51.cc/tag/PHP/" target="_blank" class="keywords">PHP</a> <BR>@<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_connect("localhost","root","1981427") //选择<a href="https://www.jb51.cc/tag/shujuku/" target="_blank" class="keywords">数据库</a>之前需要先连接<a href="https://www.jb51.cc/tag/shujuku/" target="_blank" class="keywords">数据库</a>服务器 <BR>or die("<a href="https://www.jb51.cc/tag/shujuku/" target="_blank" class="keywords">数据库</a>服务器连接失败"); <BR>@<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_select_db("test") //选择<a href="https://www.jb51.cc/tag/shujuku/" target="_blank" class="keywords">数据库</a>mydb <BR>or die("<a href="https://www.jb51.cc/tag/shujuku/" target="_blank" class="keywords">数据库</a>不存在或不可用"); <BR>//<a href="https://www.jb51.cc/tag/huoqu/" target="_blank" class="keywords">获取</a><a href="https://www.jb51.cc/tag/yonghu/" target="_blank" class="keywords">用户</a>输入 <BR>$username = $_POST['username']; <BR>$passcode = $_POST['passcode']; <BR>$cookie = $_POST['cookie']; <BR>//执行<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>语句 <BR>$query = @<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_query("select username,userflag from users " <BR>."where username = '$username' and passcode = '$passcode'") <BR>or die("<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>语句执行失败"); <BR>//判断<a href="https://www.jb51.cc/tag/yonghu/" target="_blank" class="keywords">用户</a>是否存在，密码是否正确 <BR>if($row = <a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_fetch_array($query)) <BR>{ <BR>if($row['userflag'] == 1 or $row['userflag'] == 0) //判断<a href="https://www.jb51.cc/tag/yonghu/" target="_blank" class="keywords">用户</a>权限信息是否有效 <BR>{ <BR>switch($cookie) //根据<a href="https://www.jb51.cc/tag/yonghu/" target="_blank" class="keywords">用户</a>的选择设置cookie保存时间 <BR>{ <BR>case 0: //保存Cookie为浏览器进程 <BR>setcookie("username",$row['username']); <BR>break; <BR>case 1: //保存1天 <BR>setcookie("username",$row['username'],time()+24<em>60</em>60); <BR>break; <BR>case 2: //保存30天 <BR>setcookie("username",time()+30<em>24</em>60<em>60); <BR>break; <BR>case 3: //保存365天 <BR>setcookie("username",time()+365</em>24<em>60</em>60); <BR>break; <BR>} <BR>header("location: main.<a href="https://www.jb51.cc/tag/PHP/" target="_blank" class="keywords">PHP</a>"); //<a href="https://www.jb51.cc/tag/zidongtiaozhuan/" target="_blank" class="keywords">自动跳转</a>到main.<a href="https://www.jb51.cc/tag/PHP/" target="_blank" class="keywords">PHP</a> <BR>} <BR>else <BR>{ <BR>echo "<a href="https://www.jb51.cc/tag/yonghu/" target="_blank" class="keywords">用户</a>权限信息不正确"; <BR>} <BR>} <BR>else <BR>{ <BR>echo "<a href="https://www.jb51.cc/tag/yonghuming/" target="_blank" class="keywords">用户名</a>或密码<a href="https://www.jb51.cc/tag/cuowu/" target="_blank" class="keywords">错误</a>"; <BR>} <BR>?> <BR></div><BR><div class="codetitle"><span><a style="CURSOR: pointer" data="62042" class="copybut" id="copybut62042" onclick="doCopy('code62042')"><U></U></a> <a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>如下:</div><div class="codebody" id="code62042"><BR><?<a href="https://www.jb51.cc/tag/PHP/" target="_blank" class="keywords">PHP</a> <BR>session_start(); <BR>if(isset($_COOKIE['username'])) <BR>{ <BR>@<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_connect("localhost","1981427") //选择<a href="https://www.jb51.cc/tag/shujuku/" target="_blank" class="keywords">数据库</a>之前需要先连接<a href="https://www.jb51.cc/tag/shujuku/" target="_blank" class="keywords">数据库</a>服务器 <BR>or die("<a href="https://www.jb51.cc/tag/shujuku/" target="_blank" class="keywords">数据库</a>服务器连接失败"); <BR>@<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_select_db("test") //选择<a href="https://www.jb51.cc/tag/shujuku/" target="_blank" class="keywords">数据库</a>mydb <BR>or die("<a href="https://www.jb51.cc/tag/shujuku/" target="_blank" class="keywords">数据库</a>不存在或不可用"); <BR>//<a href="https://www.jb51.cc/tag/huoqu/" target="_blank" class="keywords">获取</a>Session <BR>$username = $_COOKIE['username']; <BR>//执行<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>语句获得userflag的值 <BR>$query = @<a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_query("select userflag from users " <BR>."where username = '$username'") <BR>or die("<a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>语句执行失败"); <BR>$row = <a href="https://www.jb51.cc/tag/MysqL/" target="_blank" class="keywords">MysqL</a>_fetch_array($query); <BR>//获得<a href="https://www.jb51.cc/tag/yonghu/" target="_blank" class="keywords">用户</a>权限信息 <BR>$flag = $row['userflag']; <BR>//根据userflag的值<a href="https://www.jb51.cc/tag/shuchu/" target="_blank" class="keywords">输出</a>不同的欢迎信息 <BR>if($flag == 1) <BR>echo "欢迎<a href="https://www.jb51.cc/tag/guanliyuan/" target="_blank" class="keywords">管理员</a>".$_SESSION['username']."<a href="https://www.jb51.cc/tag/denglu/" target="_blank" class="keywords">登录</a>系统"; <BR>if($flag == 0) <BR>echo "欢迎<a href="https://www.jb51.cc/tag/yonghu/" target="_blank" class="keywords">用户</a>".$_SESSION['username']."<a href="https://www.jb51.cc/tag/denglu/" target="_blank" class="keywords">登录</a>系统"; <BR>echo "<a href="logout.php" href="logout.php">注销</a>"; <BR>} <BR>else <BR>{ <BR>echo "您没有权限访问本页面"; <BR>} <BR>?> <BR></div><BR><div class="codetitle"><span><a style="CURSOR: pointer" data="1563" class="copybut" id="copybut1563" onclick="doCopy('code1563')"><U></U></a> <a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>如下:</div><div class="codebody" id="code1563"><BR><?<a href="https://www.jb51.cc/tag/PHP/" target="_blank" class="keywords">PHP</a> <BR>setcookie("username"); 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