一个网站的建设目的就是功能的完整性。其中有一个功能就是用户登录验证的实现。下面我们就向大家详细介绍有关
PHP Cookie登录验证代码示例：
<ol class="dp-xml">
<li class="alt"><span><span class="tag"><span> ?php </span></span></span></li>
<li><span>@mysql_connect("localhost", "root","1981427")<br> //选择数据库之前需要先连接数据库服务器 </span></li>
<li class="alt"><span>or die("数据库服务器连接失败"); </span></li>
<li><span>@mysql_select_db("test") //选择数据库mydb </span></li>
<li class="alt"><span>or die("数据库不存在或不可用"); </span></li>
<li><span>//获取用户输入 </span></li>
<li class="alt">
<span>$</span><span class="attribute">username</span><span> = $_POST['username']; </span>
</li>
<li>
<span>$</span><span class="attribute">passcode</span><span> = $_POST['passcode']; </span>
</li>
<li class="alt">
<span>$</span><span class="attribute">cookie</span><span> = $_POST['cookie']; </span>
</li>
<li><span>//执行SQL语句 </span></li>
<li class="alt">
<span>$</span><span class="attribute">query</span><span> = @mysql_query("select username, <br>userflag from users " </span>
</li>
<li>
<span>."where </span><span class="attribute">username</span><span> = </span><span class="attribute-value">'$username'</span><span> and <br></span><span class="attribute">passcode</span><span> = </span><span class="attribute-value">'$passcode'</span><span>") </span>
</li>
<li class="alt"><span>or die("SQL语句执行失败"); </span></li>
<li><span>//判断用户是否存在，密码是否正确 </span></li>
<li class="alt">
<span>if($</span><span class="attribute">row</span><span> = </span><span class="attribute-value">mysql_fetch_array</span><span>($query)) </span>
</li>
<li><span>{ </span></li>
<li class="alt"><span>if($row['userflag'] == 1 or $row['userflag'] == 0) <br>//判断用户权限信息是否有效 </span></li>
<li><span>{ </span></li>
<li class="alt"><span>switch($cookie) //根据用户的选择设置cookie保存时间 </span></li>
<li><span>{ </span></li>
<li class="alt"><span>case 0: //保存Cookie为浏览器进程 </span></li>
<li><span>setcookie("username", $row['username']); </span></li>
<li class="alt"><span>break; </span></li>
<li><span>case 1: //保存1天 </span></li>
<li class="alt"><span>setcookie("username", $row['username'],<br> time()+24*60*60); </span></li>
<li><span>break; </span></li>
<li class="alt"><span>case 2: //保存30天 </span></li>
<li><span>setcookie("username", $row['username'],<br> time()+30*24*60*60); </span></li>
<li class="alt"><span>break; </span></li>
<li><span>case 3: //保存365天 </span></li>
<li class="alt"><span>setcookie("username", $row['username'], <br>time()+365*24*60*60); </span></li>
<li><span>break; </span></li>
<li class="alt"><span>} </span></li>
<li><span>header("location: main.php"); <br>//自动跳转到main.php </span></li>
<li class="alt"><span>} </span></li>
<li><span>else </span></li>
<li class="alt"><span>{ </span></li>
<li><span>echo "用户权限信息不正确"; </span></li>
<li class="alt"><span>} </span></li>
<li><span>} </span></li>
<li class="alt"><span>else </span></li>
<li><span>{ </span></li>
<li class="alt"><span>echo "用户名或密码错误"; </span></li>
<li><span>} </span></li>
<li class="alt">
<span class="tag">?></span><span> </span>
</li>
</ol>PHP Cookie登录验证代码实例：
<ol class="dp-xml">
<li class="alt"><span><span class="tag"><span> ?php </span></span></span></li>
<li><span>session_start(); </span></li>
<li class="alt"><span>if(isset($_COOKIE['username'])) </span></li>
<li><span>{ </span></li>
<li class="alt"><span>@mysql_connect("localhost", "root","1981427") </span></li>
<li class="alt"><span>//选择数据库之前需要先连接数据库服务器 </span></li>
<li><span>or die("数据库服务器连接失败"); </span></li>
<li class="alt"><span>@mysql_select_db("test") //选择数据库mydb </span></li>
<li><span>or die("数据库不存在或不可用"); </span></li>
<li class="alt"><span>//获取Session </span></li>
<li>
<span>$</span><span class="attribute">username</span><span> = $_COOKIE['username']; </span>
</li>
<li class="alt"><span>//执行SQL语句获得userflag的值 </span></li>
<li>
<span>$</span><span class="attribute">query</span><span> = @mysql_query("select <br>userflag from users " </span>
</li>
<li class="alt">
<span>."where </span><span class="attribute">username</span><span> = </span><span class="attribute-value">'$username'</span><span>") </span>
</li>
<li><span>or die("SQL语句执行失败"); </span></li>
<li class="alt">
<span>$</span><span class="attribute">row</span><span> = </span><span class="attribute-value">mysql_fetch_array</span><span>($query); </span>
</li>
<li><span>//获得用户权限信息 </span></li>
<li class="alt">
<span>$</span><span class="attribute">flag</span><span> = $row['userflag']; </span>
</li>
<li><span>//根据userflag的值输出不同的欢迎信息 </span></li>
<li class="alt">
<span>if($</span><span class="attribute">flag</span><span> == 1) </span>
</li>
<li><span>echo "欢迎管理员".$_SESSION['username']<br>."登录系统"; </span></li>
<li class="alt">
<span>if($</span><span class="attribute">flag</span><span> == 0) </span>
</li>
<li><span>echo "欢迎用户".$_SESSION['username']<br>."登录系统"; </span></li>
<li class="alt">
<span>echo "</span><span class="tag"><span> </span><span class="tag-name">a</span><span> </span><span class="attribute">href</span><span>=</span><span class="attribute-value">"logout.php"</span><span> <br></span><span class="attribute">href</span><span>=</span><span class="attribute-value">"logout.php"</span><span class="tag">></span><span>注销</span><span class="tag"><span> /a</span><span class="tag">></span><span>"; </span></span></span>
</li>
<li><span>} </span></li>
<li class="alt"><span>else </span></li>
<li><span>{ </span></li>
<li class="alt"><span>echo "您没有权限访问本页面"; </span></li>
<li><span>} </span></li>
<li class="alt">
<span class="tag">?></span><span> </span>
</li>
<li><span class="tag"><span> ?php </span></span></li>
<li class="alt"><span>setcookie("username"); </span></li>
<li><span>echo "注销成功"; </span></li>
<li class="alt">
<span class="tag">?></span><span> </span>
</li>
</ol>以上及时PHP Cookie登录验证的实现方法。
