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: ' . $password . ' .'; exit;?>以下代码并不真正相关，因为我主要是复制它，因为我不知道如何进行实时聊天，但我了解其中的 98%：live.php：<?phpsession_start();$username = $_POST['btn1'];//Create a session of username and logging in the user to the chat roomif(isset($_POST['username'])){ $_SESSION['username']=$username;}
1 回答
holdtom
TA贡献1805条经验 获得超10个赞
$_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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