所以我正在嘗試為網(wǎng)站實(shí)施登錄，我希望它能更改頂部的菜單欄。但是我在使用 php 會(huì)話時(shí)沒有得到想要的結(jié)果我一開始使用session_start<?phpsession_start();?>然后為了改變我使用的菜單欄<?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 }?>我的日志模式框和腳本如下<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>
1 回答
哆啦的時(shí)光機(jī)
TA貢獻(xiàn)1779條經(jīng)驗(yàn) 獲得超6個(gè)贊
session_start 需要在你的代碼的第一行......我看到你在另一頁上有這個(gè)但是，這個(gè)仍然是錯(cuò)誤的;）否則，在 isset 之前做一個(gè)：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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