ユーザーがログインする単純なログイン システムを作成すると、ログインしたユーザーの詳細が保存され、ログアウト リンクをクリックするまで常にログインされます。これを行うには、Cookie を使用する方がよいと聞きました。以下はログインページです。
teacherlogin.php スクリプト:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<?php
// connect to the database
include('connect.php');
include('member.php');
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
die();
}
// required variables (make them explciit no need for foreach loop)
$teacherusername = (isset($_POST['teacherusername'])) ? $_POST['teacherusername'] : '';
$teacherpassword = (isset($_POST['teacherpassword'])) ? $_POST['teacherpassword'] : '';
$loggedIn = false;
$active = true;
if ((isset($username)) && (isset($userid))){
echo "You are already Logged In: <b>{$_SESSION['teacherforename']} {$_SESSION['teachersurname']}</b> | <a href='./menu.php'>Go to Menu</a> | <a href='./teacherlogout.php'>Logout</a>";
}
else{
if (isset($_POST['submit'])) {
$teacherpassword = md5(md5("g3f".$teacherpassword."rt4"));
// don't use $mysqli->prepare here
$query = "SELECT TeacherId, TeacherForename, TeacherSurname, TeacherUsername, TeacherPassword, Active FROM Teacher WHERE TeacherUsername = ? AND TeacherPassword = ? LIMIT 1";
// prepare query
$stmt=$mysqli->prepare($query);
// You only need to call bind_param once
$stmt->bind_param("ss",$teacherusername,$teacherpassword);
// execute query
$stmt->execute();
// get result and assign variables (prefix with db)
$stmt->bind_result($dbTeacherId, $dbTeacherForename,$dbTeacherSurname,$dbTeacherUsername,$dbTeacherPassword, $dbActive);
while($stmt->fetch()) {
if ($teacherusername == $dbTeacherUsername && $teacherpassword == $dbTeacherPassword) {
if ($dbActive == 0) {
$loggedIn = false;
$active = false;
echo "You Must Activate Your Account from Email to Login";
}else {
$loggedIn = true;
$active = true;
$_SESSION['teacherid'] = $dbTeacherId;
$_SESSION['teacherusername'] = $dbTeacherUsername;
}
}
}
if ($loggedIn == true){
$_SESSION['teacherforename'] = $dbTeacherForename;
$_SESSION['teachersurname'] = $dbTeacherSurname;
header( 'Location: menu.php' ) ;
die();
}
if (!$loggedIn && $active && isset($_POST)) {
echo "<span style='color: red'>The Username or Password that you Entered is not Valid. Try Entering it Again</span>";
}
/* close statement */
$stmt->close();
/* close connection */
$mysqli->close();
}
?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<title>Teacher Login</title>
<link rel="stylesheet" type="text/css" href="TeacherLoginStyle.css">
</head>
<body>
<?php
include('noscript.php');
?>
<h1>TEACHER LOGIN</h1>
<form action="<?php echo htmlentities($_SERVER['PHP_SELF']); ?>" method="post" id="teachLoginForm">
<p>Username</p><p><input type="text" name="teacherusername" /></p> <!-- Enter Teacher Username-->
<p>Password</p><p><input type="password" name="teacherpassword" /></p> <!-- Enter Teacher Password-->
<p><input id="loginSubmit" type="submit" value="Login" name="submit" /></p>
</form>
<a href="./forgotpass.php">Forgot Password</a>
</body>
<?php
}
?>
上記のコードでは、ユーザーは関連するテキスト入力にユーザー名とパスワードを入力します。ログインの詳細を送信すると、データベースをチェックインして、ログインの詳細がデータベースで一致するかどうかを確認します。
今私がしたいのは、ユーザーのユーザー名と id の詳細を php スクリプト (member.php) に保存して、どのユーザーがログインしているかを知ることです。時間の:
member.php ページ:
<?php
if (isset($_SESSION['teacherid'])) {
$userid = $_SESSION['teacherid'];
}
if (isset($_SESSION['teacherusername'])) {
$username = $_SESSION['teacherusername'];
}
?>
上記のコードを変更して Cookie を使用し、メンバー ページのユーザーの詳細が無期限 (もちろんログアウトするまで) 保持されるようにするにはどうすればよいですか。
アップデート:
Teacher
これがデータベースのテーブルです。
TeacherId (auto PK) TeacherForename TeacherSurname TeacherUsername, TeacherPassword
1 John Parks j.parks b018460fba79b
2 Mary Little u0876555 a33rfe3tn12e3
3 Jim Owen owensjimmy fkof04r3fk422
つまり、最初に列 SessionId を上記のテーブルに追加し、各ユーザーの複雑な ID に格納すると言っています34dekfm45345
。
それでは、正しいSessionIdを見つけてSessionIdを削除する方法に関するコードを確認できるようにするために、あなたの助けが本当に必要です.
更新 2:
したがって、私が正しく理解していれば、php スクリプトは次のようになります。
teacherlogin.php:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<?php
// connect to the database
include('connect.php');
include('member.php');
include('sessionuser.php');
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
die();
}
// required variables (make them explciit no need for foreach loop)
$teacherusername = (isset($_POST['teacherusername'])) ? $_POST['teacherusername'] : '';
$teacherpassword = (isset($_POST['teacherpassword'])) ? $_POST['teacherpassword'] : '';
$loggedIn = false;
$active = true;
if ((isset($username)) && (isset($userid))){
echo "You are already Logged In: <b>{$_SESSION['teacherforename']} {$_SESSION['teachersurname']}</b> | <a href='./menu.php'>Go to Menu</a> | <a href='./teacherlogout.php'>Logout</a>";
}
else{
if (isset($_POST['submit'])) {
$teacherpassword = md5(md5("g3f".$teacherpassword."rt4"));
// don't use $mysqli->prepare here
$query = "SELECT TeacherId, TeacherForename, TeacherSurname, TeacherUsername, TeacherPassword, Active FROM Teacher WHERE TeacherUsername = ? AND TeacherPassword = ? LIMIT 1";
// prepare query
$stmt=$mysqli->prepare($query);
// You only need to call bind_param once
$stmt->bind_param("ss",$teacherusername,$teacherpassword);
// execute query
$stmt->execute();
// get result and assign variables (prefix with db)
$stmt->bind_result($dbTeacherId, $dbTeacherForename,$dbTeacherSurname,$dbTeacherUsername,$dbTeacherPassword, $dbActive);
while($stmt->fetch()) {
if ($teacherusername == $dbTeacherUsername && $teacherpassword == $dbTeacherPassword) {
if ($dbActive == 0) {
$loggedIn = false;
$active = false;
echo "You Must Activate Your Account from Email to Login";
}else {
$loggedIn = true;
$active = true;
$_SESSION['teacherid'] = $dbTeacherId;
$_SESSION['teacherusername'] = $dbTeacherUsername;
}
}
}
if ($loggedIn == true){
$_SESSION['teacherforename'] = $dbTeacherForename;
$_SESSION['teachersurname'] = $dbTeacherSurname;
header( 'Location: menu.php' ) ;
die();
}
if (!$loggedIn && $active && isset($_POST)) {
echo "<span style='color: red'>The Username or Password that you Entered is not Valid. Try Entering it Again</span>";
}
/* close statement */
$stmt->close();
/* close connection */
$mysqli->close();
}
?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<title>Teacher Login</title>
<link rel="stylesheet" type="text/css" href="TeacherLoginStyle.css">
</head>
<body>
<?php
include('noscript.php');
?>
<h1>TEACHER LOGIN</h1>
<form action="<?php echo htmlentities($_SERVER['PHP_SELF']); ?>" method="post" id="teachLoginForm">
<p>Username</p><p><input type="text" name="teacherusername" /></p> <!-- Enter Teacher Username-->
<p>Password</p><p><input type="password" name="teacherpassword" /></p> <!-- Enter Teacher Password-->
<p><input id="loginSubmit" type="submit" value="Login" name="submit" /></p>
</form>
<a href="./forgotpass.php">Forgot Password</a>
</body>
<?php
}
?>
ユーザーが現在ログインしているかどうかを確認するコードを変更していませんif ((isset($username)) && (isset($userid))){
。関連するものに変更しますか? 上記の `include(sessionuser.php) コードを含めました
member.php スクリプト:
<?php
if (isset($_SESSION['teacherid'])) {
$userid = $_SESSION['teacherid'];
}
if (isset($_SESSION['teacherusername'])) {
$username = $_SESSION['teacherusername'];
}
?>
上記の member.php スクリプトはまだ必要ですか?
sessionuser.php スクリプト:
$sessionUserID = false;
if (isset($_COOKIE['sessionUserID']) && preg_match('/^[a-z9-0]{32}$/i) {
$sessionUserID = $_COOKIE['sessionUserID'];
// Get the session details from the database
$sql = 'SELECT s.*, t.* FROM SessionUser s LEFT JOIN Teacher t ON s.TeacherId=t.TeacherId WHERE s.SessionUserId=:SessionUserId';
$aParams = array(':SessionUserId' => $sessionUserID)
$sessionRow = $stmnt->fetch();
if ($sessionRow) {
// User is logged in, and you have details in $sessionRow
// At this point, you can also validate other info such as the UserAgent, IP etc. All forgable, but can help add a littel security.
} else {
// Passed an invalid / expired session ID
$sessionUserID = false;
}
}
// If you don't have a session, create one
if (!$sessionUserID) {
// Create a session user ID - make it non sequential
// You should put this in a loop and check $sessionID is unique. Insert will fail is not unique
$sessionUserID = md5(time() . uniqid());
$sql = 'INSERT INTO SessionUser(SessionUserId, TeacherId)
VALUES(:SessionUserId, 0)';
$aParams = array(':SessionUserId' => $sessionUserID)
$smnt->execute();
// Default session details
$sessionRow = array('TeacherId'=>0);
// Now the cookie part
setcookie('sessionUserID', $sessionUserID, time() + howLongYouWant, '/');
}
// Not check for user logging in.
if (UserLogsIn) {
if ($sessionRow['teacher_id'] > 0) {
// Already logged in!?
} else {
$sql = 'UPDATE SessionUser SET Teacher_id=:TeacherId WHERE SessionUserId=:SessionUserId';
$aParams = array(':TeacherId'=>$TeacherId, ':SessionUserId' => $sessionUserID);
$smnt->execute();
// After a form post, always redirect to the same page or another page - stops the "do you want to resent this data" message on back button
// DO NOT echo anything before this point.
header('location: this page');
exit();
}
} elseif (UserLogsOut) {
if ($sessionRow['TeacherId'] == 0) {
// Not Logged In!?
} else {
$sql = 'UPDATE SessionUser SET TeacherId=0 WHERE SessionUserd=:SessionUserid';
$aParams = array(':session_id' => $sessionID);
$smnt->execute();
// After a form post, always redirect to the same page or another page - stops the "do you want to resent this data" message on back button
// DO NOT echo anything before this point.
header('location: this page');
exit();
}
}
sessionuser.php スクリプト コードに上記のコードがすべて含まれているというのは正しいですか? 以下のデータベーステーブルと一致するようにコードを変更しました。
SessionUser テーブル:
SessionUserId (CHAR32) PK
TeacherId (INT) //matches TeacherId field in teacher table
更新 2 は正しいですか?