基于PHP的登录和注册的功能的实现-巨人网络通讯

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 style="clear: both;">/div>
					/div>
				/div>
			/form>
			div style="clear: both;">/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 style="clear: both;">/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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