這篇文章將為大家詳細講解有關實現PHP的登錄和注冊的上的功能，小編覺得挺實用的，因此分享給大家做個參考，希望大家閱讀完這篇文章后可以有所收獲。
1.新建三個html文件，兩個php文件和若干個CSS文件和若干個JS文件
2.登錄的html頁面顯示效果圖
3.注冊的頁面的顯示效果圖
4.登錄頁面的form表單代碼
<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>用戶名：</p> <input type="text" name="username" placeholder="手機號/郵箱" /> <p>密碼：</p> <input type="password" name="password" placeholder="密碼可見" /> <br /> <button class="slig-btn">登錄</button> <p> 沒有賬號？請 <a href="regist.html" rel="external nofollow" >注冊</a> <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="wj">忘記密碼？</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.注冊頁面的form表單代碼
<div class="password-con registered"> <form action="regist.php" method="post"> <div class="psw"> <p class="psw-p1">用戶名</p> <input type="text" name="username" placeholder="HR了" /> <span class="dui"></span> </div> <div class="psw"> <p class="psw-p1">輸入密碼</p> <input type="password" name="password" placeholder="請輸入密碼" /> <span class="cuo">密碼由6-16的字母、數字、符號組成</span> </div> <div class="psw"> <p class="psw-p1">確認密碼</p> <input type="password" name="repassword" placeholder="請再次輸入密碼" /> <span class="cuo">密碼不一致，請重新輸入</span> </div> <div class="psw psw2"> <p class="psw-p1">手機號/郵箱</p> <input type="text" name="telphone" placeholder="請輸入手機/郵箱驗證碼" /> <button>獲取短信驗證碼</button> </div> <div class="psw psw3"> <p class="psw-p1">驗證碼</p> <input type="text" placeholder="請輸入驗證碼" /> </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" >換張圖</a> </p> <div ></div> </div> <div class="agreement"> <input type="checkbox" name="hobby" /> <p> 我有閱讀并同意 <span>《宅客微購網站服務協議》</span> </p> </div> <button type="submit" value="注冊" class="psw-btn">立即注冊</button> <p class="sign-in"> 已有賬號？請 <a href="login.html" rel="external nofollow" >登錄</a> </p> </form> </div><!-- 注冊框結束 -->
6.login.php代碼
<?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 '數據庫連接失??！';
exit(0);
}else{
if ($username == ''){
echo '<script>alert("請輸入用戶名！");history.go(-1);</script>';
exit(0);
}
if ($password == ''){
echo '<script>alert("請輸入密碼！");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("用戶名或密碼錯誤！");history.go(-1);</script>';
}
}
?>7.regist.php代碼
<?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("請輸入用戶名！");history.go(-1);</script>';
exit(0);
}
if ($password == ''){
echo '<script>alert("請輸入密碼");history.go(-1);</script>';
exit(0);
}
if ($password != $repassword){
echo '<script>alert("密碼與確認密碼應該一致");history.go(-1);</script>';
exit(0);
}
if($password == $repassword){
$conn = new mysqli('localhost','root','root','shopping');
if ($conn->connect_error){
echo '數據庫連接失??！';
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("用戶名已經存在");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('系統繁忙，請稍候！');</script>";
}
}
}
}else{
echo "<script>alert('提交未成功！'); history.go(-1);</script>";
}
?>8.進入首頁后的圖片
9.數據庫的圖片
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