PHP简易用户登录系统，供大家参考，具体内容如下
最近刚刚看到PHP连接数据库的实例，于是做了一个简易的用户系统
直接上代码
连接数据库：connect.php
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<?php$servername = "localhost";$username = "formbd";$password = "formbd";$dbname = "form"; // 创建连接$conn = new mysqli($servername, $username, $password, $dbname); // 检测连接if ($conn->connect_error) { die("连接失败: " . $conn->connect_error);}?> |
用户注册前端页面:reg.html
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<!doctype html><html lang="en"> <head> <meta charset="UTF-8"> <title>用户注册页面</title> </head> <body> <form action="reg.php" method="post"> <p>用户名:<input type="text" name="name"></p> <p>密 码: <input type="text" name="password"></p> <p><input type="submit" name="submit" value="注册"> <a href="login.html" ><input type="button" name="login" value="已有账号，返回登录"></a> </p> </form> </body></html> |
注册后端处理:reg.php
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<?php header("Content-Type: text/html; charset=utf8"); if(!isset($_POST['submit'])){ exit("错误执行"); }//判断是否有submit操作 $name=$_POST['name'];//post获取表单里的name $user_password=$_POST['password'];//post获取表单里的password include('connect.php');//链接数据库 $q="insert into user(id,username,password) values (null,'$name','$user_password')";//向数据库插入表单传来的值的sql $sql = "select * from user where username = '$name'"; if (($conn->query($sql))==$name) { echo '用户名已存在'; $result = $conn->query($sql); /*echo " <script> setTimeout(function(){window.location.href='reg.html';},1000); </script> ";*/ } else { $conn->query($q); echo "注册成功"; echo " <script> setTimeout(function(){window.location.href='login.html';},1000); </script> ";} $conn->close();//关闭数据库?> |
用户登录前端页面:login.html
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<!doctype html><html lang="en"> <head> <meta charset="UTF-8"> <title>登陆</title> </head> <body> <form name="login" action="login.php" method="post"> <p>用户名<input type=text name="name"></p> <p>密 码<input type=password name="password"></p> <p><input type="submit" name="submit" value="登录"> <a href="reg.html" ><input type="button" name="reg" value="注册"></a> </p> </form> </body></html> |
登录后端处理:login.php
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<?PHP header("Content-Type: text/html; charset=utf8"); if(!isset($_POST["submit"])){ exit("错误执行"); }//检测是否有submit操作 include('connect.php');//链接数据库 $name = $_POST['name'];//post获得用户名表单值 $passowrd = $_POST['password'];//post获得用户密码单值 if ($name && $passowrd){//如果用户名和密码都不为空 $sql = "select * from user where username = '$name' and password='$passowrd'";//检测数据库是否有对应的username和password的sql $result = $conn->query($sql);//执行sql $rows=$result->fetch_assoc();//返回一个数值 if($rows){//0 false 1 true header("refresh:0;url=success.php");//如果成功跳转至success.php页面 exit; }else{ echo "用户名或密码错误"; echo " <script> setTimeout(function(){window.location.href='login.html';},1000); </script> ";//如果错误使用js 1秒后跳转到登录页面重试; } }else{//如果用户名或密码有空 echo "表单填写不完整"; echo " <script> setTimeout(function(){window.location.href='login.html';},1000); </script>"; //如果错误使用js 1秒后跳转到登录页面重试; } $conn->close();//关闭数据库?> |
登录成功后:success.php
PS:功能未完善
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<?php include 'connect.php';session_start(); //声明变量$username = isset($_SESSION['nmae']) ? $_SESSION['name'] : "";?> |
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<!doctype html><html lang="en"> <head> <meta charset="UTF-8"> <title>登陆成功</title> </head> <body> 欢迎光临 <?php echo $username;?> <?php ?> </body></html> |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/qq_41679358/article/details/107203465
