本文目录一览：
php mysql用户注册
?php
if($_POST){
extract($_POST);
if(trim($username)==''){ //提交后检测
echo '用户名不能为空';
exit();
}
if(trim(password1)!='' password1==password2){
$password = md5($password1);
}else{
echo '两次输入的密码不一至！';
exit();
}
mysql_query("insert into 表 (username,password) values('$username','$password')");
}
?
!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" ""
html xmlns=""
head
meta http-equiv="Content-Type" content="text/html; charset=utf-8" /
titletest/title
/head
script type="text/javascript"
function $(id){return document.getElementById(id).value;}
function checkForm(){ //提交前检测
if($('username')==''){
alert('用户名不能为空！');
return false;
}
if($('username').length 11){
alert('用户名不超过11位');
return false;
}
if($('password1')==''){
alert('密码不能为空！');
return false;
}
if($('password1')!=$('password2')){
alert('两次输入的密码不一至！');
return false;
}
return true;
}
/script
body
form id="form1" name="form1" method="post" action="" onsubmit="return checkForm();"
p
用户名：
input type="text" name="username" id="username" onkeyup="value=value.replace(/[W]/g,'') " onbeforepaste="value=value.replace(/[W]/g,'')"/
/p
p
密码：
input type="text" name="password1" id="password1" /
/p
p重复密码：
input type="text" name="password2" id="password2" /
/p
p
input type="submit" name="button" id="button" value="提交" /
/p
/form
/body
/html
PHP+MySql注册登录
你看一下我这个能不能明白，我也是学这个的，有时间可以一起探讨一下，我QQ：772965552，问题：13796730936
先建数据库
CREATE DATABASE yonghudenglu;
USE yonghudenglu;
CREATE TABLE yonghudenglu (
id int(10) unsigned,
name varchar(50),
xingbie varchar(50),
mima varchar(50),
);
注册页面：
?php
//连接数据库
$link = mysql_connect('localhost', 'root', '123456');
//判断连接是否成功
if (!$link)
{
die('Could not connect: ' . mysql_error());
}
//选择数据库
mysql_select_db("yonghudenglu");
//判断姓名是否为空
if (!empty($_POST['name']))
{
if (!empty($_POST['xingbie']))
{
if (!empty($_POST['mima']))
{
$name=($_POST['name']);
$xingbie=($_POST['xingbie']);
$mima=($_POST['mima']);
$xinmima=($_POST['xinmima']);
$query="select name,xingbie from yonghudenglu where name='$name' and xingbie='$xingbie'";
$result=mysql_query($query);
$num_rows = mysql_num_rows($result);
if ($num_rows0)
{
echo "您输入的用户名已经有人注册了，请重新输入！";
echo "script language="JavaScript"rn";
echo " alert("您输入的用户名已经有人注册,请重新输入！");rn";
echo " history.back();rn";
echo "/script";
exit;
}
else
{
if ($mima==$xinmima)
{
$sql1="insert into yonghudenglu (name,xingbie,mima) values('$name','$xingbie','$mima');";
mysql_query($sql1);
mysql_query("commit");
echo "script language="JavaScript"rn";
echo " alert("恭喜您注册成功！");rn";
echo " location.replace("10.htm");rn"; // 自己修改网址
echo "/script";
exit;
}
else
{
#echo "您没有输入密码，请重新输入！";
echo "script language="JavaScript"rn";
echo " alert("您输入的两次密码不一样，请重新输入！");rn";
echo " history.back();rn";
echo "/script";
exit;
}
}
}
else
{
#echo "您没有输入密码，请重新输入！";
echo "script language="JavaScript"rn";
echo " alert("您没有输入密码，请重新输入！");rn";
echo " history.back();rn";
echo "/script";
exit;
}
}
else
{
echo "script language="JavaScript"rn";
echo " alert("您没有选择性别，请重新选择！");rn";
echo " history.back();rn";
echo "/script";
exit;
}
}
else
{
echo "script language="JavaScript"rn";
echo " alert("您没有输入姓名，请重新输入！");rn";
echo " history.back();rn";
echo "/script";
exit;
}
?
登陆页面：
?php
$link = mysql_connect('localhost', 'root', '123456');
if (!$link)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("yonghudenglu");
if (!empty($_POST['name']))
{
if (!empty($_POST['mima']))
{
$name=($_POST['name']);
$mima=($_POST['mima']);
$quer="select name,mima from yonghudenglu where name='$name'";
$result=mysql_query($quer);
$num_rows = mysql_num_rows($result);
$row = mysql_fetch_array($result, MYSQL_ASSOC);
if ($num_rows0)
{
$mima1=$row["mima"];
if ($mima==$mima1)
{
echo "script language="JavaScript"rn";
echo " alert("登陆成功");rn";
echo " location.replace("12.html");rn"; // 自己修改网址
echo "/script";
exit;
}
else
{
echo "script language="JavaScript"rn";
echo " alert("您输入的密码不正确！请重新输入！");rn";
echo " history.back();rn";
echo "/script";
exit;
}
}
else
{
echo "script language="JavaScript"rn";
echo " alert("您还没有注册，请先注册！");rn";
echo " history.back();rn";
echo "/script";
exit;
}
}
else
{
#echo "您没有输入密码，请重新输入！";
echo "script language="JavaScript"rn";
echo " alert("您没有输入密码，请重新输入！");rn";
echo " history.back();rn";
echo "/script";
exit;
}
}
else
{
echo "script language="JavaScript"rn";
echo " alert("您没有输入姓名，请重新输入！");rn";
echo " history.back();rn";
echo "/script";
exit;
}
?
不会就加我啊，哈哈
怎么用php程序将登录或者注册信息写进数据库（mysql）？
$query="select * from reg where username='$username' and pwd='$pwd'";
将该语句这样写：$query = sprintf("select * from reg where username=%s and pwd=%s ", $username, $pwd);
php+mysql怎么做登录注册
首先得到提交的数据
链接数据库,查询数据库,查询username 和pwd
提交的username 和 pwd 跟数据库查询的username 和pwd做对比,
都相等那就是登陆成功
?php
mysql_connect('localhost','root','123');
mysql_select_db('lx');
mysql_query("SET CHARACTER SET utf8");
mysql_query("SET NAMES utf8");
//数据库lx 表user 字段id username pwd
//用md5加密,可以自己试试
if(isset($_POST['user'])$_POST['tijiao'] == 'success'){
$query = mysql_query("select pwd from user where username = '".$_POST['user']."'");
$num = mysql_num_rows($query);
if($num 0 ){
while($info = mysql_fetch_array($query)){
if($info['pwd'] == md5($_POST['pwd'])){
echo '登陆成功';
}else{
echo '登陆失败';
}
}
}else{
echo '登陆失败';
}
}
?
form action="" method="get"/
table border="0" cellspacing="0" cellpadding="0"
tr
td class="fieldKey" width="30%"用户名:/td
td class="fieldValue" width="100%"input type="text" name="user" //td
/tr
trtd height="10"/td/tr
tr
td class="fieldKey"密码:/td
td class="fieldValue"input type="password" name="pwd" //td
/tr
/table
input type="hidden" name="tijiao" value="success" /
input type="submit" value="登陆"/
/form