注册主页面:
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 ????<title>用户注册</title> 6 </head> 7 <body> 8 ????<table width="360px" border="1" align="center"> 9 ????<form method="post" action="reg_do.php">10 ????????<tr>11 ????????????<td align="center" colspan="2" style="font-size: 36px">用户注册</td>12 ????????</tr>13 ????????<tr>14 ????????????<td>用户名:</td>15 ????????????<td><input type="text" name="username" id="username"></td>16 ????????</tr>17 ????????<tr>18 ????????????<td>用户昵称:</td>19 ????????????<td><input type="text" name="nickname" id="nickname"></td>20 ????????</tr>21 ????????<tr>22 ????????????<td>用户密码:</td>23 ????????????<td><input type="password" name="password" id="password"></td>24 ????????</tr>25 ????????<tr>26 ????????????<td>重复密码:</td>27 ????????????<td><input type="password" name="repeatpassword" id="repeatpassword"></td>28 ????????</tr>29 ????????<tr>30 ????????????<td>用户头像:</td>31 ????????????<td><input type="button" value="选择头像" name="profile" id="profile"></td>32 ????????</tr>33 ????????<tr>34 ????????????<td colspan="2" align="center"><input type="submit" name="register" id="register"></td>35 ????????</tr>36 ????</form>37 ????</table>38 </body>39 </html>
注册主页面提交后判断提交数据是否符合要求，符合要求，跳到登录页面
1 <?php include_once(‘config.php‘) ?> 2 <!DOCTYPE html> 3 <html> 4 <head> 5 ????<title></title> 6 </head> 7 <body> 8 ????<?php 9 ????????$username = $_POST[‘username‘];10 ????????$nickname = $_POST[‘nickname‘];11 ????????$password = $_POST[‘password‘];12 ????????$repeatpassword = $_POST[‘repeatpassword‘];13 ????????if (!$username)14 ????????{15 ????????????exit(‘<script>alert("请填写用户名! ")16 ????????????history.back();</script>‘);17 ????????}18 ????????if (!$nickname)19 ????????{20 ????????????exit(‘<script>alert("请填写用户昵称! ")21 ????????????history.back();</script>‘);22 ????????}23 ????????if (!$password)24 ????????{25 ????????????exit(‘<script>alert("请填写密码! ")26 ????????????history.back();</script>‘);27 ????????}28 ????????if (!$repeatpassword)29 ????????{30 ????????????exit(‘<script>alert("请填写重复密码! ")31 ????????????history.back();</script>‘);32 ????????}33 ????????//同时判断其他的参数是否填写34 35 ????????//判断该用户名是否存在36 ????????$sql = "select * from userlist where username = ‘" . $username . "‘ ";37 ????????$query = mysqli_query($db, $sql);38 ????????if (!$query)39 ????????{40 ????????????exit(‘SQL语句执行错误:1 ‘ . mysqli_error($db));41 ????????}42 ????????if ($info = mysqli_fetch_array($query))43 ????????{44 ????????????exit(‘<script>alert("该用户名已存在, 请重新填写!");history.back();</script>‘);45 ????????}46 47 ????????//判断密码是否一致48 ????????if ($password != $repeatpassword)49 ????????{50 ????????????die(‘<script>alert("两次填写密码不一致，请重写填写")</script>‘);51 ????????}52 53 ????????//执行注册54 ????????$sql = "insert into userlist(username, nickname, password, regtime, regip) values(‘" . $username . "‘, ‘". $nickname . "‘, ‘". md5($password) . "‘, "55 ????????. time() . ", ‘". $_SERVER[‘REMOTE_ADDR‘] . "‘)";//点怎么可以连接整数了56 ????????$query = mysqli_query($db, $sql);57 ????????if (!$query)58 ????????{59 ????????????exit(‘SQL语句执行错误:‘ . mysqli_error($db));60 ????????}61 ????????else62 ????????{63 ????????????exit(‘<script>alert("注册成功,请登录");window.location.href = "sign_in.php"</script>‘);64 ????????}65 ?????>66 </body>67 </html>登录页面:
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 ????<title>用户登录</title> 6 </head> 7 <body> 8 ????<table width="360px" border="1" align="center"> 9 ????<form method="post" action="sign_do.php">10 ????????<tr>11 ????????????<td align="center" colspan="2" style="font-size: 36px">用户登录</td>12 ????????</tr>13 ????????<tr>14 ????????????<td>用户名:</td>15 ????????????<td><input type="text" name="username" id="username"></td>16 ????????</tr>17 ????????<tr>18 ????????????<td>用户密码:</td>19 ????????????<td><input type="password" name="password" id="password"></td>20 ????????</tr>21 ????????<tr>22 ????????????<td colspan="2" align="center"><input type="submit" name="register" id="register">如果您没有账号,请<a href="register.php">注册</a></td>23 ????????</tr>24 ????</form>25 ????</table>26 </body>27 </html>
判断登录信息，登录成功，跳转到聊天室:
1 <?php include_once(‘config.php‘) ?> 2 <!DOCTYPE html> 3 <html> 4 <head> 5 ????<title></title> 6 </head> 7 <body> 8 ????<?php ??9 ????????$username = $_POST[‘username‘];10 ????????$password = $_POST[‘password‘];11 ????????if (!$username)12 ????????{13 ????????????exit(‘<script>alert("请填写用户名! ")14 ????????????history.back();</script>‘);15 ????????}16 ????????if (!$password)17 ????????{18 ????????????exit(‘<script>alert("请填写密码! ")19 ????????????history.back();</script>‘);20 ????????}21 ????????22 ????????//若用户名正确，判断密码是否正确23 ????????$sql = "select * from userlist where username = ‘" . $username ."‘ and password = ‘" . md5($password) . "‘ ";24 ????????$query = mysqli_query($db, $sql);25 ????????if (!$query)26 ????????{27 ????????????exit(‘SQL语句执行错误: ‘ . mysqli_error($db));28 ????????}29 ????????if (!$info = mysqli_fetch_array($query))30 ????????{31 ????????????exit(‘<script>alert("密码不正确, 请重新填写!");history.back();</script>‘);32 ????????}33 ????????34 ????????$_SESSION[‘uid‘] = $info[‘uid‘];35 ????????$_SESSION[‘nickname‘] = $info[‘nickname‘];36 ????????die(‘<script>alert("登录成功");window.location.href="chat.php"</script>‘)37 ?????>38 </body>39 </html>聊天室(未更新完)
1 <?php include_once(‘config.php‘) ?> 2 <!DOCTYPE html> 3 <html> 4 <head> ????5 ????<title></title> 6 </head> 7 <body background=""> ????8 ????<?php 9 ????????$name = $_SESSION[‘nickname‘];10 ????????echo ‘欢迎您,‘, $name;11 ?????>12 <a href="signout.php">注销</a>13 <br/>14 <table width="1000px" border="1" align="center">15 <form method="post" action="record.php">16 ????<tr>17 ????????<td ?colspan="2">添加留言</td>18 ????</tr>19 ????<tr>20 ????????<td align="center" style="font-size: 36px">留言:</td>21 ????????<td><textarea rows="10" cols="40" name="record"></textarea></td>22 ????????</tr>23 ????<tr>24 ????????<td></td>25 ????????<td><input type="submit" name="chat"></td>26 ????</tr>27 </form> ???28 </table>29 </body>30 </html>
聊天室留言判断
1 <?php 2 ????include_once(‘config.php‘); 3 ????include_once(‘if_register.php‘); 4 ?> 5 <!DOCTYPE html> 6 <html> 7 <head> 8 ????<title></title> 9 </head>10 <body>11 ????<?php12 ????????$comment = $_POST[‘record‘];13 ????????$uid = $_SESSION[‘uid‘];14 ????????$addtime = time();15 ????????$active = 0;16 ????????$ip = $_SERVER[‘REMOTE_ADDR‘];17 ????????if (!$comment)18 ????????{19 ????????????die(‘<script>alert("评论不能为空"); history.back();</script>‘);20 ????????}21 ????????$sql = "insert into chat(comment, uid, addtime, active, ip) values (‘" . $comment . "‘,‘" . $uid . "‘,‘" . $addtime . "‘,‘" . $active . "‘,‘" . $ip . "‘)";22 ????????$query = mysqli_query($db, $sql);23 ????????if (!$query)24 ????????{25 ????????????die(‘SQL语句执行错误‘. mysqli_error($db));26 ????????}27 ????????else28 ????????{29 ????????????die(‘<script>alert("留言成功");window.location.href = "chat.php"</script>‘);30 ????????}31 ?????>32 </body>33 </html>未完待续
php小项目：聊天室(注册，登录，聊天==)
原文地址：https://www.cnblogs.com/ducklu/p/8983234.html