PHP实现简单注册登录详细代码

吾爱主题阅读：119 2021-11-03 15:28:00 评论：0

PHP实现简单注册登录详细全部代码先看演示~

示例图：

Ps.本人有点懒哈~ 就输出个成功算了吧~

PHP实现登录注册

index.php (首页)
login.php (登录)
register.php (注册)

代码里面注释写很详细了哦~ 废话不多说直接上代码~

index.php文件

代码如下：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 <!DOCTYPE html> <html> <head> <meta charset= "utf-8" > <meta name= "viewport" content= "width=device-width, initial-scale=1" > <title>Zhe - 注册登录</title> <link rel= "stylesheet" type= "text/css" href= "https://www.layuicdn.com/layui/css/layui.css" rel= "external nofollow" /> <script src= "https://www.layuicdn.com/layui/layui.js" charset= "utf-8" ></script> </head> <body> <fieldset class = "layui-elem-field layui-field-title" style= "margin-top: 20px;" > <legend>Zhe - 登录注册演示</legend> </fieldset> <div style= "padding: 20px; background-color: #F2F2F2;" > <div class = "layui-row layui-col-space15" > <div class = "layui-col-md6" > <div class = "layui-card" > <div class = "layui-card-header" >注册</div> <div class = "layui-card-body" > <form class = "layui-form" action= "register.php" method= "post" onsubmit= "return checkForm(this)" lay-filter= "example" > <div class = "layui-form-item" > <label class = "layui-form-label" >输入框</label> <div class = "layui-input-block" > <input type= "text" name= "username" placeholder= "请输入账号" class = "layui-input" > </div> </div> <div class = "layui-form-item" > <label class = "layui-form-label" >密码框</label> <div class = "layui-input-block" > <input type= "password" name= "password" placeholder= "请输入密码" class = "layui-input" > </div> </div> <div class = "layui-form-item" > <div class = "layui-input-block" > <input type= "submit" class = "layui-btn layui-btn-normal" value= "立即注册" /> </div> </div> </form> </div> </div> </div> <div class = "layui-col-md6" > <div class = "layui-card" > <div class = "layui-card-header" >登录</div> <div class = "layui-card-body" > <form class = "layui-form" action= "login.php" method= "post" onsubmit= "return checkForm(this)" lay-filter= "example" > <div class = "layui-form-item" > <label class = "layui-form-label" >输入框</label> <div class = "layui-input-block" > <input type= "text" name= "username" placeholder= "请输入账号" class = "layui-input" > </div> </div> <div class = "layui-form-item" > <label class = "layui-form-label" >密码框</label> <div class = "layui-input-block" > <input type= "password" name= "password" placeholder= "请输入密码" class = "layui-input" > </div> </div> <div class = "layui-form-item" > <div class = "layui-input-block" > <input type= "submit" class = "layui-btn layui-btn-normal" value= "立即登录" /> </div> </div> </form> </div> </div> </div> </div> </div> <script type= "text/javascript" > // 验证输入不为空的脚本代码 function checkForm(form) { if (form.username.value == "" ) { alert( "用户名不能为空!" ); form.username.focus(); return false; } if (form.password.value == "" ) { alert( "密码不能为空!" ); form.password.focus(); return false; } return true; } </script> </body> </html>

代码如下：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 <?php session_start(); header( "content-type:text/html;charset=utf-8" ); //连接数据库 $link = mysqli_connect( "localhost" , "pay_com_cn" , "pay_com_cn" , "pay_com_cn" ); if (! $link ) { die ( "连接失败: " . mysqli_connect_error()); } //接收$_POST用户名和密码 $username = $_POST [ 'username' ]; $password = $_POST [ 'password' ]; //查看表user用户名与密码和传输值是否相等 $sql = "SELECT * FROM user WHERE username = '$username' AND password = '$password'" ; //result必需规定由 mysqli_query()、mysqli_store_result() 或 mysqli_use_result() 返回的结果集标识符。 $result = mysqli_query( $link , $sql ); $num = mysqli_num_rows( $result ); //函数返回结果集中行的数量 //判断是否登录后显示或跳转 if ( $num ){ echo '登录成功' ; } else { echo '登录失败' ; } mysqli_close( $link ); //关闭数据库 ?>

代码如下：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 <?php header( "content-type:text/html;charset=utf-8" ); //连接数据库 $link = mysqli_connect( "localhost" , "pay_com_cn" , "pay_com_cn" , "pay_com_cn" ); if (! $link ) { die ( "连接失败: " . mysqli_connect_error()); } //接收$_POST用户名和密码 $username = $_POST [ 'username' ]; $password = $_POST [ 'password' ]; //查看表user用户名是否存在或为空 $sql_select = "SELECT * FROM user WHERE username = '$username'" ; //result必需规定由 mysqli_query()、mysqli_store_result() 或 mysqli_use_result() 返回的结果集标识符。 $select = mysqli_query( $link , $sql_select ); $num = mysqli_num_rows( $select ); //函数返回结果集中行的数量 if ( $username == "" || $password == "" ) { echo "请确认信息完整性" ; } else if ( $num ){ echo "已存在用户名" ; //已存在账户名输出错误 } else { $sql = "insert into user(username,password) values('$username','$password')" ; $result =mysqli_query( $link , $sql ); //判断是否注册后显示内容 if (! $result ) { echo "注册不成功！" . "<br>" ; //输出错误 echo "<a href='index.php'>返回</a>" ; //超链接到首页 } else { echo "注册成功!" . "<br/>" ; //输出成功 echo "<a href='index.hphp'>立刻登录</a>" ; //超链接到首页 } } ?>