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php如何实现注册
1、编写前端注册form表单代码
<!DOCTYPE html> <html> <head><title>注册</title> <meta name="content-type"; charset="UTF-8"> </head><body> <div class="content" align="center"> <!--头部--> <div class="header"> <h1>注册页面</h1> </div> <!--中部--> <div class="middle"> <form action="registeraction.php" method="post"> <table border="0"> <tr> <td>用户名:</td> <td><input type="text" id="id_name" name="username" required="required"></td> </tr> <tr> <td>密 码:</td> <td><input type="password" id="password" name="password" required="required"></td> </tr> <tr> <td>重复密码:</td> <td><input type="password" id="re_password" name="re_password" required="required"></td> </tr> <tr> <td>性别:</td> <td> <input type="radio" id="sex" name="sex" value="mam">男 <input type="radio" id="sex" name="sex" value="woman">女 </td> </tr> <tr> <td>QQ:</td> <td><input type="text" id="qq" name="qq" required="required"></td> </tr> <tr> <td>Email:</td> <td><input type="email" id="email" name="email" required="required"></td> </tr> <tr> <td>电话:</td> <td><input type="text" id="phone" name="phone" required="required"></td> </tr> <tr> <td>地址:</td> <td><input type="text" id="address" name="address" required="required"></td> </tr> <tr> <td colspan="2" align="center" style="color:red;font-size:10px;"> <!--提示信息--> <?php $err = isset($_GET["err"]) ? $_GET["err"] : ""; switch ($err) { case 1: echo "用户名已存在!"; break; case 2: echo "密码与重复密码不一致!"; break; case 3: echo "注册成功!"; break; } ?> </td> </tr> <tr> <td colspan="2" align="center"> <input type="submit" id="register" name="register" value="注册"> <input type="reset" id="reset" name="reset" value="重置"> </td></tr> <tr> <td colspan="2" align="center"> 如果已有账号,快去<a href="login.php">登录</a>吧! </td> </tr> </table> </form> </div> <!--脚部--> <div class="footer"> <small>Copyright © 版权所有·欢迎翻版 </div> </div></body></html>
2、编写后台注册registeraction.php代码
<?php // $Id:$ //声明变量 $username = isset($_POST['username']) ? $_POST['username'] : ""; $password = isset($_POST['password']) ? $_POST['password'] : ""; $re_password = isset($_POST['re_password']) ? $_POST['re_password'] : ""; $sex = isset($_POST['sex']) ? $_POST['sex'] : ""; $qq = isset($_POST['qq']) ? $_POST['qq'] : ""; $email = isset($_POST['email']) ? $_POST['email'] : ""; $phone = isset($_POST['phone']) ? $_POST['phone'] : ""; $address = isset($_POST['address']) ? $_POST['address'] : ""; if ($password == $re_password) { //建立连接 $conn = mysqli_connect("localhost", "", "", "user"); //准备SQL语句,查询用户名 $sql_select = "SELECT username FROM usertext WHERE username = '$username'"; //执行SQL语句 $ret = mysqli_query($conn, $sql_select); $row = mysqli_fetch_array($ret); //判断用户名是否已存在 if ($username == $row['username']) { //用户名已存在,显示提示信息 header("Location:register.php?err=1"); } else { //用户名不存在,插入数据 //准备SQL语句 $sql_insert = "INSERT INTO usertext(username,password,sex,qq,email,phone,address) VALUES('$username','$password','$sex','$qq','$email','$phone','$address')"; //执行SQL语句 mysqli_query($conn, $sql_insert); header("Location:register.php?err=3"); } //关闭数据库 mysqli_close($conn); } else { header("Location:register.php?err=2"); } ?>
3、数据表设计:
4、效果:
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