上篇文章给大家介绍了《如何用PHP解决高并发问题？（附源码）》，本文继续给大家介绍如何用PHP实现简单注册登录系统 ，一起研究吧！！！
目录结构如下，其中function文件夹下包含两个函数文件，uploads文件夹用于存放上传的文件。
注：博主使用的是php5，使用php7的小伙伴运行报错的话有一部分原因是新的语法造成的，修改成新语法就可以了
登录页面
index.html
<form action="login_process.php" method="POST"> 登录 <input type="text" name="userName" size="20" maxlength="15" placeholder="请填写用户名及域名"> <br> 注册 <input type="password" name="password" size="20" maxlength="15"> <br> <input type="submit" value="登录"> <input type="button" onclick="window.location.href='register.html'" value="注册"> </form>
注册页面
register.html
<h2>用户注册登录系统</h2> <hr> <form action="register.php" method="POST" enctype="multipart/form-data"> 用户名： <input type="text" name="userName" size="20" maxlength="15" placeholder="必须填写用户名"> @ <select name="domain" id=""> <option value="@163.com" selected>163.com</option> <option value="@126.com">126.com</option> </select> <br> 登录密码： <input type="password" name="password" size="20" maxlength="15"> <br> 确认密码： <input type="password" name="confirmPassword" size="20" maxlength="15"> <br> 选择性别： <input type="radio" name="sex" value="male" checked>男 <input type="radio" name="sex" value="female">女 <br> 个人爱好： <input name="interests[]" type="checkbox" value="music">音乐 <input name="interests[]" type="checkbox" value="game">游戏 <input name="interests[]" type="checkbox" value="film">电影 <br> 个人相片 <input type="hidden" name="MAX_FILE_SIZE" value="1024"> <input type="file" name="myPicture" size="25" maxlength="100"> <br> 备注信息： <textarea name="remark" cols="30" rows="4" placeholder="请填写备注信息"></textarea> <br> <input type="submit" name="submit" value="注册"> <input type="reset" name="cancel" value="重填"> </form>
实现登录功能
login_process.php
<?php
include_once("function/database.php");
// $userName = $_POST['userName'];
// $password = $_POST['password'];
$userName = addslashes($_POST['userName']);
$password = addslashes($_POST['password']);
getConnect();
$loginSQL = "select * from users where userName='$userName' and password='$password'";
echo $loginSQL;
$resultLogin = mysql_query($loginSQL);
if (mysql_num_rows($resultLogin) > 0) {
echo "登录成功";
} else {
echo "登录失败";
}
closeConnect();
?>实现注册功能
register.php
<?php
include_once("function/fileSystem.php");
include_once("function/database.php");
if (empty($_POST)) {
exit("您提交的表单数据超过post_max_size! <br>");
}
// 判断输入密码与确认密码是否相同
$password = $_POST['password'];
$confirmPassword = $_POST['confirmPassword'];
if ($password != $confirmPassword) {
exit("输入的密码与确认密码不相等！");
}
$userName = $_POST['userName'];
$domain = $_POST['domain'];
$userName = $userName . $domain;
// 判断用户名是否重复
$userNameSQL = "select * from users where userName = '$userName'";
getConnect();
$resultSet = mysql_query($userNameSQL);
if (mysql_num_rows($resultSet) > 0) {
exit("用户名已被占用，请更换其他用户名");
}
$sex = $_POST['sex'];
if (empty($_POST['interests'])) {
$interests = "";
} else {
$interests = implode(";", $_POST['interests']);
}
$remark = $_POST['remark'];
$myPictureName = $_FILES['myPicture']['name'];
$registerSQL = "insert into users values(null, '$userName', '$password', '$sex', '$interests', '$myPictureName', '$remark')";
$message = upload($_FILES['myPicture'], "uploads");
if ($message == "上传成功" || $message == "没有上传") {
mysql_query($registerSQL);
$userID = mysql_insert_id();
echo "注册成功<br>";
} else {
exit($message);
}
$userSQL = "select * from users where user_id = '$userID'";
$userResult = mysql_query($userSQL);
if ($user = mysql_fetch_array($userResult)) {
echo "您的注册用户名为：" . $user['userName'];
} else {
exit("用户注册失败！");
}
closeConnect();实现数据库连接与关闭的函数
database.php
<?php
$databaseConnection = null;
function getConnect() {
$hosthome = "localhost";
$database = "register";
$userName = "root";
$password = "123456";
global $databaseConnection;
$databaseConnection = @mysql_connect($hosthome, $userName, $password) or die (mysql_error());
mysql_query("set names gbk");
@mysql_select_db($database, $databaseConnection) or die (mysql_error());
}
function closeConnect() {
global $databaseConnection;
if ($databaseConnection) {
@mysql_close($databaseConnection) or die (mysql_error());
}
}
?>实现文件上传的函数
fileSystem.php
<?php
function upload($file, $filePath) {
$error = $file['error'];
switch ($error) {
case 0:
$fileName = $file['name'];
$fileTemp = $file['tmp_name'];
$destination = $filePath . "/" . $fileName;
move_uploaded_file($fileTemp, $destination);
return "上传成功";
case 1:
return "上传超过upload_max_filesize";
case 2:
return "上传文件超过form的MAX_FILE_SIZE";
case 3:
return "附件部分上传";
case 4:
return "没有上传";
}
}
?>推荐学习：《PHP视频教程》
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