生活随笔
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用户登录和注册的功能
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<form?action="logincheck.php"?method="post">??????用戶名：<input?type="text"?name="username"?/>??????<br?/>??????密碼：<input?type="password"?name="password"?/>??????<br?/>??????<input?type="submit"?name="submit"?value="登陸"?/>????????????????<a?href="register.php">注冊</a>??</form>??登錄處理界面 logincheck.php
[php] view plain copy
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<?php??????if(isset($_POST["submit"])?&&?$_POST["submit"]?==?"登陸")??????{??????????$user?=?$_POST["username"];??????????$psw?=?$_POST["password"];??????????if($user?==?""?||?$psw?==?"")??????????{??????????????echo?"<script>alert('請輸入用戶名或密碼！');?history.go(-1);</script>";??????????}??????????else??????????{??????????????mysql_connect("localhost","root","sixx");??????????????mysql_select_db("vt");??????????????mysql_query("set?names?'gbk'");??????????????$sql?=?"select?username,password?from?user?where?username?=?'$_POST[username]'?and?password?=?'$_POST[password]'";??????????????$result?=?mysql_query($sql);??????????????$num?=?mysql_num_rows($result);??????????????if($num)??????????????{??????????????????$row?=?mysql_fetch_array($result);??//將數(shù)據(jù)以索引方式儲存在數(shù)組中??????????????????echo?$row[0];??????????????}??????????????else??????????????{??????????????????echo?"<script>alert('用戶名或密碼不正確！');history.go(-1);</script>";??????????????}??????????}??????}??????else??????{??????????echo?"<script>alert('提交未成功！');?history.go(-1);</script>";??????}?????>??注冊界面 register.php
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<form?action="regcheck.php"?method="post">??????用戶名：<input?type="text"?name="username"/>??????<br/>??????密 碼:<input?type="password"?name="password"/>??????<br/>??????確認(rèn)密碼：<input?type="password"?name="confirm"/>??????<br/>??????<input?type="Submit"?name="Submit"?value="注冊"/>??</form>??注冊處理界面 regcheck.php
[php] view plain copy
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<?php??????if(isset($_POST["Submit"])?&&?$_POST["Submit"]?==?"注冊")??????{??????????$user?=?$_POST["username"];??????????$psw?=?$_POST["password"];??????????$psw_confirm?=?$_POST["confirm"];??????????if($user?==?""?||?$psw?==?""?||?$psw_confirm?==?"")??????????{??????????????echo?"<script>alert('請確認(rèn)信息完整性！');?history.go(-1);</script>";??????????}??????????else??????????{??????????????if($psw?==?$psw_confirm)??????????????{??????????????????mysql_connect("localhost","root","sixx");???//連接數(shù)據(jù)庫??????????????????mysql_select_db("vt");??//選擇數(shù)據(jù)庫??????????????????mysql_query("set?names?'gdk'");?//設(shè)定字符集??????????????????$sql?=?"select?username?from?user?where?username?=?'$_POST[username]'";?//SQL語句??????????????????$result?=?mysql_query($sql);????//執(zhí)行SQL語句??????????????????$num?=?mysql_num_rows($result);?//統(tǒng)計(jì)執(zhí)行結(jié)果影響的行數(shù)??????????????????if($num)????//如果已經(jīng)存在該用戶??????????????????{??????????????????????echo?"<script>alert('用戶名已存在');?history.go(-1);</script>";??????????????????}??????????????????else????//不存在當(dāng)前注冊用戶名稱??????????????????{??????????????????????$sql_insert?=?"insert?into?user?(username,password,phone,address)?values('$_POST[username]','$_POST[password]','','')";??????????????????????$res_insert?=?mysql_query($sql_insert);??????????????????????//$num_insert?=?mysql_num_rows($res_insert);??????????????????????if($res_insert)??????????????????????{??????????????????????????echo?"<script>alert('注冊成功！');?history.go(-1);</script>";??????????????????????}??????????????????????else??????????????????????{??????????????????????????echo?"<script>alert('系統(tǒng)繁忙，請稍候！');?history.go(-1);</script>";??????????????????????}??????????????????}??????????????}??????????????else??????????????{??????????????????echo?"<script>alert('密碼不一致！');?history.go(-1);</script>";??????????????}??????????}??????}??????else??????{??????????echo?"<script>alert('提交未成功！');?history.go(-1);</script>";??????}???>??
轉(zhuǎn)載于:https://www.cnblogs.com/lewuqiong/p/5968152.html
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