这篇文章运用简单易懂的例子给大家介绍如何在php中实现用户注册，代码非常详细，感兴趣的小伙伴们可以参考借鉴，希望对大家能有所帮助。
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"> <h2>注册页面</h2> </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：
关于如何在php中实现用户注册就分享到这里了，希望以上内容可以对大家有一定的帮助，可以学到更多知识。如果觉得文章不错，可以把它分享出去让更多的人看到。
