这篇文章将为大家详细讲解有关实现PHP的登录和注册的上的功能，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。
1.新建三个html文件，两个php文件和若干个CSS文件和若干个JS文件
2.登录的html页面显示效果图
3.注册的页面的显示效果图
4.登录页面的form表单代码
<div class="sign-con w1200"> <img src="img/logn-tu.gif" class="sign-contu f-l"/> <form action="login.php" method="post"> <div class="sign-ipt f-l"> <p>用户名：</p> <input type="text" name="username" placeholder="手机号/邮箱" /> <p>密码：</p> <input type="password" name="password" placeholder="密码可见" /> <br /> <button class="slig-btn">登录</button> <p> 没有账号？请 <a href="regist.html" rel="external nofollow" >注册</a> <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="wj">忘记密码？</a> </p> <div class="sign-qx"> <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="f-r"> <img src="img/sign-xinlan.gif" /> </a> <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="qq f-r"> <img src="img/sign-qq.gif" /> </a> <div ></div> </div> </div> </form> <div ></div> </div>
5.注册页面的form表单代码
<div class="password-con registered"> <form action="regist.php" method="post"> <div class="psw"> <p class="psw-p1">用户名</p> <input type="text" name="username" placeholder="HR了" /> <span class="dui"></span> </div> <div class="psw"> <p class="psw-p1">输入密码</p> <input type="password" name="password" placeholder="请输入密码" /> <span class="cuo">密码由6-16的字母、数字、符号组成</span> </div> <div class="psw"> <p class="psw-p1">确认密码</p> <input type="password" name="repassword" placeholder="请再次输入密码" /> <span class="cuo">密码不一致，请重新输入</span> </div> <div class="psw psw2"> <p class="psw-p1">手机号/邮箱</p> <input type="text" name="telphone" placeholder="请输入手机/邮箱验证码" /> <button>获取短信验证码</button> </div> <div class="psw psw3"> <p class="psw-p1">验证码</p> <input type="text" placeholder="请输入验证码" /> </div> <div class="yanzhentu"> <div class="yz-tu f-l"> <img src="img/psw-yanzhengtu.gif" /> </div> <p class="f-l"> 看不清楚？ <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >换张图</a> </p> <div ></div> </div> <div class="agreement"> <input type="checkbox" name="hobby" /> <p> 我有阅读并同意 <span>《宅客微购网站服务协议》</span> </p> </div> <button type="submit" value="注册" class="psw-btn">立即注册</button> <p class="sign-in"> 已有账号？请 <a href="login.html" rel="external nofollow" >登录</a> </p> </form> </div><!-- 注册框结束 -->
6.login.php代码
<?php
header("Content-type: text/html; charset=utf-8");
$username = $_POST['username'];
$password = $_POST['password'];
$conn = new mysqli('localhost','root','root','shopping');
if ($conn->connect_error){
echo '数据库连接失败！';
exit(0);
}else{
if ($username == ''){
echo '<script>alert("请输入用户名！");history.go(-1);</script>';
exit(0);
}
if ($password == ''){
echo '<script>alert("请输入密码！");history.go(-1);</script>';
exit(0);
}
$sql = "select username,password from userinfo where username = '$_POST[username]' and password = '$_POST[password]'";
$result = $conn->query($sql);
$number = mysqli_num_rows($result);
if ($number) {
echo '<script>window.location="index.html";</script>';
} else {
echo '<script>alert("用户名或密码错误！");history.go(-1);</script>';
}
}
?>7.regist.php代码
<?php
header("Content-type: text/html; charset=utf-8");
$username = $_POST['username'];
$password = $_POST['password'];
$repassword = $_POST['repassword'];
$telphone = $_POST['telphone'];
if ($username == ''){
echo '<script>alert("请输入用户名！");history.go(-1);</script>';
exit(0);
}
if ($password == ''){
echo '<script>alert("请输入密码");history.go(-1);</script>';
exit(0);
}
if ($password != $repassword){
echo '<script>alert("密码与确认密码应该一致");history.go(-1);</script>';
exit(0);
}
if($password == $repassword){
$conn = new mysqli('localhost','root','root','shopping');
if ($conn->connect_error){
echo '数据库连接失败！';
exit(0);
}else {
$sql = "select username from userinfo where username = '$_POST[username]'";
$result = $conn->query($sql);
$number = mysqli_num_rows($result);
if ($number) {
echo '<script>alert("用户名已经存在");history.go(-1);</script>';
} else {
$sql_insert = "insert into userinfo (username,password,telphone) values('$_POST[username]','$_POST[password]','$_POST[telphone]')";
$res_insert = $conn->query($sql_insert);
if ($res_insert) {
echo '<script>window.location="index.html";</script>';
} else {
echo "<script>alert('系统繁忙，请稍候！');</script>";
}
}
}
}else{
echo "<script>alert('提交未成功！'); history.go(-1);</script>";
}
?>8.进入首页后的图片
9.数据库的图片
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