完整注册登陆php源码，附带session验证。
1、首先先写表单页面login.html.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>用户登陆</title>
</head>
<!-- 定义输入表单样式 -->
<style type="text/css">
html{font-size: 12px;}
fieldset{width:200px;margin:0 auto;}
legend{font-weight: bold; font-size: 14px;}
label{float:left; width:70px; margin-left:10px;}
.left{margin-left:80px;}
.input{width:150px;}
span{color: #666666;}
</style>
<!-- 验证表单是否输入 -->
<script type="text/javascript">
function InputCheck(LoginForm){
if(LoginForm.username.value==\'\'){
alert(\'请输入用户名！\');
LoginForm.username.focus();
return (false);
}
if(LoginForm.password.value==\'\'){
alert(\'请输入密码！\');
LoginForm.password.focus();
return (false);
}
}
</script>
<body>
<div>
<fieldset>
<legend>用户登陆</legend>
<form name="LoginForm" method="post" action="login.php" onSubmit="return InputCheck(this)">
<p>
<lable for="username" class="lable">用户名：</lable>
<input id="username" name="username" type="text" class="input" />
</p>
<p>
<lable for="password" class="lable">密 码：</lable>
<input id="password" name="password" type="text" class="input" />
</p>
<p>
<input name="submit" value="提交" type="submit" />
<a href="reg.html">点此注册</a>
</p>
</form>
</fieldset>
</div>
</body>
</html>
2、然后写登陆源码。
<?php
session_start();
//注销登录
function logout(){
if($_GET[\'action\']=\'logout\'){
unset($_SESSION[\'user_id\']);
unset($_SESSION[\'username\']);
echo \'注销登陆成功!点击此处<a href="javascript:history.back(-1);">登陆</a>\';
exit;
}
}
//登陆
if(!isset($_POST[\'submit\'])){
exit(\'非法访问！\');
}
$username = htmlspecialchars($_POST[\'username\']);
$password = md5($_POST[\'password\']);
//引入数据库文件
include(\'mysql.php\');
//检测用户名密码是否正确
$where = \'username="\'.$username.\'"\';
if($rs=mysql_fetch_assoc(select(\'user\',$where))){
//登陆成功
$_SESSION[\'name\'] = $username;
$_SESSION[\'userid\'] = $rs[\'user_id\'];
echo $username,\' 欢迎你！进入 <a href="my.php">用户中心</a><br />\';
echo \'点击此处 <a href="login.php?action=logout">注销</a> 登录！<br />\';
exit;
}else {
exit(\'登录失败！点击此处 <a href="javascript:history.back(-1);">返回</a> 重试\');
}
3、注册页面表单
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>用户登陆</title>
</head>
<!-- 定义输入表单样式 -->
<style type="text/css">
html{font-size: 12px;}
fieldset{width:200px;margin:0 auto;}
legend{font-weight: bold; font-size: 14px;}
label{float:left; width:70px; margin-left:10px;}
.left{margin-left:80px;}
.input{width:150px;}
span{color: #666666;}
</style>
<!-- 验证表单是否输入 -->
<script type="text/javascript">
function InputCheck(LoginForm){
if(LoginForm.username.value==\'\'){
alert(\'请输入用户名！\');
LoginForm.username.focus();
return (false);
}
if(LoginForm.password.value==\'\'){
alert(\'请输入密码！\');
LoginForm.password.focus();
return (false);
}
if(LoginForm.email.value==\'\'){
alert(\'请输入邮箱\');
LoginForm.email.focus();
return (false);
}
}
</script>
<body>
<div>
<fieldset>
<legend>用户登陆</legend>
<form name="LoginForm" method="post" action="reg.php" onSubmit="return InputCheck(this)">
<p>
<lable for="username" class="lable">用户名：</lable>
<input id="username" name="username" type="text" class="input" />
</p>
<p>
<lable for="password" class="lable">密 码：</lable>
<input id="password" name="password" type="text" class="input" />
</p>
<p>
<lable for="password" class="lable">邮 箱：</lable>
<input id="email" name="email" type="text" class="input" />
</p>
<p>
<input name="submit" value="注册" type="submit" />
</p>
</form>
</fieldset>
</div>
</body>
</html>
4、接收注册表单。
<?php
if(!isset($_POST[\'submit\'])){
exit(\'非法操作！\');
}
$username = strtolower($_POST[\'username\']);
$password = strtolower($_POST[\'password\']);
$email = strtolower($_POST[\'email\']);
//注册信息判断
// if(!preg_match(\'/^[\w\x80-\xff]{3-15}$/\',$username)){
// exit(\'错误：用户名不符合规定。<a href="javascript:history.back(-1);">返回</a>\');
// }
if(strlen($password)<6){
exit(\'错误：密码长度太短。<a href="javascript:history.back(-1);">返回</a>\');
}
// if(!preg_match(\'/^w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*$/\',$email)){
// exit(\'错误：电子邮件格式有误。<a href="javascript:history.back(-1);">返回</a>\');
// }
//引入数据库操作文件
include(\'mysql.php\');
//检测用户名是否存在
$where = \'username="\'.$username.\'"\';
if(mysql_fetch_assoc(select(\'user\',$where))){
echo \'错误：用户名\',$usename,\'已存在.<a href="javascript:history.back(-1);">返回</a>\';
exit();
}
//插入数据
$password = md5($password);
$data[\'username\'] = $username;
$data[\'password\'] = $password;
$data[\'email\'] = $_POST[\'email\'];
$re = insert(\'user\',$data);
if($re){
exit(\'用户注册成功！点此登录<a href=" login.html">登陆</a>\');
}else{
echo \' 添加数据失败：\',mysql_error(),\'<br>\';
echo \'点击此处<a href="javascript:history.back(-1);">返回</a>重试\';
}
5、验证页面是否已经登录
<?php
session_start();
//检测是否登录，若没登录则转向登录界面
if(!isset($_SESSION[\'userid\'])){
header("Location:login.html");
exit();
}
//包含数据库连接文件
include(\'conn.php\');
$userid = $_SESSION[\'userid\'];
$username = $_SESSION[\'username\'];
$user_query = mysql_query("select * from user where uid=$userid limit 1");
$row = mysql_fetch_array($user_query);
echo \'用户信息：<br />\';
echo \'用户ID：\',$userid,\'<br />\';
echo \'用户名：\',$username,\'<br />\';
echo \'邮箱：\',$row[\'email\'],\'<br />\';
echo \'注册日期：\',date("Y-m-d", $row[\'regdate\']),\'<br />\';
echo \'<a href="login.php?action=logout">注销</a> 登录<br />\';
6、操作数据库函数。
<?php
$db_host = "localhost:3306";
// database name
$db_name = "test";
// database username
$db_user = "root";
// database password
$db_pass = "";
$con = mysql_connect($db_host,$db_user,$db_pass);
if (!$con)
{
die(\'Could not connect: \' . mysql_error());
}
mysql_select_db($db_name, $con);
// some code
#mysql_close($con);
function select($table,$where=\'\',$order=\'\',$limits=\'\',$field=\'\'){
$field=($field==null)?\'*\':$field;
$sele.="from ".$table;
$where=($where==null)?\'\':\' where \'.$where;
$order=($order==null)?\'\':\' order by \'.$order;
$limits=($limits==null)?\'\':\' limit \'.$limits;
$sele="select ".$field." from ".$table.$where.$order.$limits;
//var_dump($sele);
return mysql_query($sele);
mysql_close($con);
}
//插入,二个参数都是必须,后为数组
function insert($table,$columns)
{
foreach($columns as $key=>$values)
{
$addkey.=\'`\'.$key.\'`,\';
if(is_numeric($values))
{
$addvalues.=$values.\',\';
}
else
{
$values=mysql_real_escape_string($values);
$addvalues.=\'\\'\'.$values.\'\\',\';
}
}
$addkey=rtrim($addkey,\',\');
$addvalues=rtrim($addvalues,\',\');
$inse.=\'INSERT INTO \'.$table.\'(\'.$addkey.\') VALUES (\'.$addvalues.\');\';
return mysql_query($inse);
}
//更新，三个参数都是必须的
function update($table,$data,$where)
{
foreach($data as $k=>$v)
{
if(is_numeric($v))
{
$edit_data.=\'`\'.$k.\'`\'.\'=\'.$v.\',\';
}
else
{
$edit_data.=\'`\'.$k.\'`\'.\'=\'."\'".mysql_real_escape_string($v)."\',";
}
}
$edit_data=rtrim($edit_data,\',\');
$upda="UPDATE ".$table." SET ".$edit_data." WHERE ".$where;
return mysql_query($upda);
}
//删除
function delete($table,$where)
{ $dele="DELETE FROM ".$table." WHERE ".$where;
return mysql_query($dele);
}
?>