PHP簡(jiǎn)易用戶(hù)登錄系統(tǒng)，供大家參考，具體內(nèi)容如下
最近剛剛看到PHP連接數(shù)據(jù)庫(kù)的實(shí)例，于是做了一個(gè)簡(jiǎn)易的用戶(hù)系統(tǒng)
直接上代碼
連接數(shù)據(jù)庫(kù)：connect.php
?php
$servername = "localhost";
$username = "formbd";
$password = "formbd";
$dbname = "form";
// 創(chuàng)建連接
$conn = new mysqli($servername, $username, $password, $dbname);
// 檢測(cè)連接
if ($conn->connect_error) {
die("連接失敗: " . $conn->connect_error);
}
?>
用戶(hù)注冊(cè)前端頁(yè)面:reg.html
!doctype html>
html lang="en">
head>
meta charset="UTF-8">
title>用戶(hù)注冊(cè)頁(yè)面/title>
/head>
body>
form action="reg.php" method="post">
p>用戶(hù)名:input type="text" name="name">/p>
p>密 碼: input type="text" name="password">/p>
p>input type="submit" name="submit" value="注冊(cè)">
a href="login.html" >input type="button" name="login" value="已有賬號(hào)，返回登錄">/a>
/p>
/form>
/body>
/html>
注冊(cè)后端處理:reg.php
?php
header("Content-Type: text/html; charset=utf8");
if(!isset($_POST['submit'])){
exit("錯(cuò)誤執(zhí)行");
}//判斷是否有submit操作
$name=$_POST['name'];//post獲取表單里的name
$user_password=$_POST['password'];//post獲取表單里的password
include('connect.php');//鏈接數(shù)據(jù)庫(kù)
$q="insert into user(id,username,password) values (null,'$name','$user_password')";//向數(shù)據(jù)庫(kù)插入表單傳來(lái)的值的sql
$sql = "select * from user where username = '$name'";
if (($conn->query($sql))==$name) {
echo '用戶(hù)名已存在';
$result = $conn->query($sql);
/*echo "
script>
setTimeout(function(){window.location.href='reg.html';},1000);
/script>
";*/
}
else {
$conn->query($q);
echo "注冊(cè)成功";
echo "
script>
setTimeout(function(){window.location.href='login.html';},1000);
/script>
";
}
$conn->close();//關(guān)閉數(shù)據(jù)庫(kù)
?>
用戶(hù)登錄前端頁(yè)面:login.html
!doctype html>
html lang="en">
head>
meta charset="UTF-8">
title>登陸/title>
/head>
body>
form name="login" action="login.php" method="post">
p>用戶(hù)名input type=text name="name">/p>
p>密 碼input type=password name="password">/p>
p>input type="submit" name="submit" value="登錄">
a href="reg.html" >input type="button" name="reg" value="注冊(cè)">/a>
/p>
/form>
/body>
/html>
登錄后端處理:login.php
?PHP
header("Content-Type: text/html; charset=utf8");
if(!isset($_POST["submit"])){
exit("錯(cuò)誤執(zhí)行");
}//檢測(cè)是否有submit操作
include('connect.php');//鏈接數(shù)據(jù)庫(kù)
$name = $_POST['name'];//post獲得用戶(hù)名表單值
$passowrd = $_POST['password'];//post獲得用戶(hù)密碼單值
if ($name $passowrd){//如果用戶(hù)名和密碼都不為空
$sql = "select * from user where username = '$name' and password='$passowrd'";//檢測(cè)數(shù)據(jù)庫(kù)是否有對(duì)應(yīng)的username和password的sql
$result = $conn->query($sql);//執(zhí)行sql
$rows=$result->fetch_assoc();//返回一個(gè)數(shù)值
if($rows){//0 false 1 true
header("refresh:0;url=success.php");//如果成功跳轉(zhuǎn)至success.php頁(yè)面
exit;
}else{
echo "用戶(hù)名或密碼錯(cuò)誤";
echo "
script>
setTimeout(function(){window.location.href='login.html';},1000);
/script>
";//如果錯(cuò)誤使用js 1秒后跳轉(zhuǎn)到登錄頁(yè)面重試;
}
}else{//如果用戶(hù)名或密碼有空
echo "表單填寫(xiě)不完整";
echo "
script>
setTimeout(function(){window.location.href='login.html';},1000);
/script>";
//如果錯(cuò)誤使用js 1秒后跳轉(zhuǎn)到登錄頁(yè)面重試;
}
$conn->close();//關(guān)閉數(shù)據(jù)庫(kù)
?>
登錄成功后:success.php
PS:功能未完善
?php
include 'connect.php';
session_start(); //聲明變量
$username = isset($_SESSION['nmae']) ? $_SESSION['name'] : "";
?>
!doctype html>
html lang="en">
head>
meta charset="UTF-8">
title>登陸成功/title>
/head>
body>
歡迎光臨
?php echo $username;?>
?php ?>
/body>
/html>
以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。
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