分配 $_SESSION 变量
如果我要使用 $_GET 方法获取用户名，如果我有多个用户登录，我会遇到问题。最新登录的用户会覆盖其他用户的信息（不在数据库中），如果前一个用户用户试图谈论他们的用户名将是最新用户的用户名。
前任。用户 Xp10d3 登录。他的用户名仍然是 Xp10d3。用户 IiBlurBeriI 登录。Xp10d3 的用户名突然变成了 IiBlurBeriI 的用户名。
我知道这样做的原因，但我想知道是否要将 $_SESSION 变量分配给 $_GET 变量，该变量会保持静态而不改变吗？如果没有，我该如何解决这个问题？
login_check_update.php：
<?php
session_start();
/* Sends an email to the user and adds the special key to another database */
$username = $_GET['username']; /* Gets the username that was submitted in the HTML form. */
$password = $_GET['password']; /* Gets the password that was submitted in the HTML form. */
$servername = "localhost"; /* MySQL database. Change if needed! Most of the time its not localhost unless you're hosting on your computer. */
$user = 'usernamelol'; /* MySQL username. Change if needed. */
$pass = 'passwordlol'; /* MySQL password. Change if needed. */
$dbname = 'vibemcform'; /* MySQL database name. Change if needed. */
$bytes = random_bytes(10); /* Randomized code */
$key = bin2hex($bytes); /* Makes the randomized code */
$link = "live.php";
$con = new mysqli($servername, $user, $pass, $dbname); /* Connects to the database */
$query = mysqli_query($con, "SELECT * FROM data WHERE (USERNAME = $username) AND password = $password");
if (!$query || mysqli_num_rows($query) == 1) {
echo "Found data in the database! Visit the chat!";
echo "<form action='live.php' method='post'><a href='".$link."'><input type='submit' name='btn1' value='$username'/></a></form>";
echo "Session ID: ". session_id() . ". ";
} else {
echo "Username not found/password incorrect. Please try again!";
}
$conn = null;
echo 'Username submitted: ' . $username . ' Password submitted: ' . $password . ' .'; exit;
?>
以下代码并不真正相关，因为我主要是复制它，因为我不知道如何进行实时聊天，但我了解其中的 98%：live.php：
<?php
session_start();
$username = $_POST['btn1'];
//Create a session of username and logging in the user to the chat room
if(isset($_POST['username'])){
$_SESSION['username']=$username;
}
浮云间1回答
-
holdtom
$_SESSION[""] 变量是全局变量。我以前不知道，但我现在知道了。我刚刚为每个注册的用户分配了每个变量。<!DOCTYPE HTML><html><head> <style> body { text-align: center; font-family: sans-serif; } a { text-decoration: none; color: blue; } #logout { margin: 0 auto; text-align: center; border: 1px solid; border-radius: 5px; max-width:1024px;; height: 800px; } </style></head><body> <div id="logout"> <?php session_start(); /* Sends an email to the user and adds the special key to another database */ $username = $_GET['username']; /* Gets the username that was submitted in the HTML form. */ $password = $_GET['password']; /* Gets the password that was submitted in the HTML form. */ $email = $_GET['email']; /* Gets the email that was submitted in the HTML form. */ $servername = "localhost"; /* MySQL database. Change if needed! Most of the time its not localhost unless you're hosting on your computer. */ $user = 'xxxx'; /* MySQL username. Change if needed. */ $pass = 'xxxx'; /* MySQL password. Change if needed. */ $dbname = 'vibemcform'; /* MySQL database name. Change if needed. */ $bytes = random_bytes(10); /* Randomized code */ $key = bin2hex($bytes); /* Makes the randomized code */ $con = new mysqli($servername, $user, $pass, $dbname); /* Connects to the database */ $query = mysqli_query($con, "SELECT * FROM `data` WHERE USERNAME='".$username."'"); /* Gets the username that was submitted */ $hash = password_hash($password, PASSWORD_DEFAULT); $_SESSION['hash'] = $hash; $_SESSION['password_not'] = $password; if (mysqli_num_rows($query) > 0) { /* If the username exists... */ echo "ERROR: Username already exists. Please try signing up again."; $con -> close(); exit; } else { /* If the username DOESN'T exist... */ try { $conn = new PDO("mysql:host=$servername;dbname=$dbname", $user, $pass); $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); $sql = "INSERT INTO dont (STR, USERNAME, PASSWORD, EMAIL) VALUES ('$key', '$username', '$hash', '$email')"; /* Insert all the data to the database */ $conn->exec($sql); } catch(PDOException $e) { echo $sql . "<br>" . $e->getMessage(); } } $conn = null; $msg = "localhost/vibemcform/verify.php?str=". $key . " Please verify your email!"; $msg = wordwrap($msg,70); /* $headers = array("From: xp10d363@gmail.com", "X-Mailer: PHP/" . PHP_VERSION ); */ if (mail($email,"Verify your email",$msg/*, $headers*/)) { echo 'Message accepted to your email address! Check your email to verify your account.'; } else { echo 'Message not sent to your email. Contact the owner of the website!'; } exit; ?> <a href="index.html">Home</a> </div></body></html>
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