所以我正在嘗試實現網站登錄，我希望它更改頂部的菜單欄。但是，使用 php 會話時我沒有得到預期的結果我一開始就使用session_start<?phpsession_start();?>然后為了更改我使用的菜單欄<?php if (!isset($_SESSION['username'])){ ?><ul> <li><a href="Index.php">Home</a></li> <li><a href="About.php">About</a></li> <li><a onclick="document.getElementById('log').style.display='block'" style="width:auto;">Log In</a> </li></ul><?php }else if (isset($_SESSION['username'])){?><ul> <li><a href="Index.php">Home</a></li> <li><a href="About.php">About</a></li> <li><a href="#logout">PLEASE LOG OUT</a></li></ul><?php }?>我的模式框和日志腳本如下<div id="log" class="modal"> <form class="modal-content animate" action="logindata.php" method="post"> <div class="container"> <label for="uname"><b>Username</b></label> <input type="text" placeholder="Enter Username" name="usrname" required> <label for="psw"><b>Password</b></label> <input type="password" placeholder="Enter Password" name="psw" required> <button type="submit">Login</button> </div> <div class="container"> <button type="button" onclick="document.getElementById('id01').style.display='none'" class="cancelbtn">Cancel</button> </div> </form></div><script> // Get the modal var modal = document.getElementById('log'); // When the user clicks anywhere outside of the modal, close it window.onclick = function(event) { if (event.target == modal) { modal.style.display = "none"; } }</script>我的logindata.php包含以下內容<?php$servername = "localhost";$username = "root";$password = "";$dbname = "phpmysql";$conn = new mysqli($servername, $username, $password, $dbname);if ($conn->connect_error) { die("Connection failed: " . $conn->connect_error);}$user1 = $email1 = $pass1 = "";if ($_SERVER["REQUEST_METHOD"] == "POST") { $user1 = test_input($_POST["usrname"]); $pass1 = test_input($_POST["psw"]);} 我知道通過明文發送密碼不是一個好策略。
1 回答
FFIVE
TA貢獻1797條經驗 獲得超6個贊
session_start 需要位于代碼的第一行...我看到您在另一頁上有這個，但是，這個仍然是錯誤的;)否則，在 isset 之前執行： print_r($_SESSION);
<?php
session_start();
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "phpmysql";
$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$user1 = $email1 = $pass1 = "";
if ($_SERVER["REQUEST_METHOD"] == "POST") {
$user1 = test_input($_POST["usrname"]);
$pass1 = test_input($_POST["psw"]);
}
function test_input($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
$sql = "SELECT username, password, email FROM users";
$result = $conn->query($sql);
$row = $result->fetch_array();
if ($row["username"]==$user1 && $row["password"]==$pass1) {
$_SESSION["username"] = $row["username"];
//$_SESSION["email"] = $row["email"];
header("Location: Main_login_authentication.php");
} else {
header("Location: Denied.php");
}
$conn->close();
?>
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