这是包含会话代码的四个页面。 当我运行sign_up.php页面时，出现一个错误，指出无法显示该页面。所以这些会议给了我一个问题。我已经在每个页面上都包含了会话代码，但我相信问题出在header(location:........); 所以请提供任何解决方案。
sign_up.php
<?php
//session_start();
//if (!isset($_SESSION["user_login"])) {
// header("Location: sign_up.php");
//} else {
// $username = $_SESSION["user_login"];
//}
?>
<!----------------------------------------------------------------------------------------------------->
<h1> Sign Up </h1>
<hr>
<div class = "user_type">
<form action="sign_up.php" method="POST" enctype="multipart/form-data">
<input type="radio" value="Student" id="radioOne" name="account" checked/>
<label for="radioOne" class="radio" chec>Student </label>
<input type="radio" value="Landlord" id="radioTwo" name="account" />
<label for="radioTwo" class="radio">Landlord</label>
<hr/>
<div class = "gender_options">
<input type="radio" value="Male" id="male" name="gender" checked/>
<label for="male" class="radio" chec>Male</label>
<input type="radio" value="Female" id="female" name="gender" />
<label for="female" class="radio">Female</label>
</div>
<input type="text" name="name" id="name" placeholder="Full Name" required/> <br/><br/>
<input type="email" name="email" id="name" placeholder="Email" pattern="[a-z0-9._%+-]+@aston.ac.uk" required/> <br/><br/>
<input type="text" name="password" id="name" placeholder="Password" required/><br/><br/>
<input type="text" name="password2" id="name" placeholder="Retype Password" required/><br/><br/>
By clicking Sign Up, you agree on our <a href="#">terms and condition</a>. <br/><br/>
<a href="#" class="button" style="margin-left: 600px; "><input type="submit" name="submit" value="Sign Up"/></a>
</form>
</div>
<hr>
<!---- log in code--->
<?php
enter code here
if (isset($_POST["user_login"]) && isset ($_POST["user_pass"])){
// formatting field via reg replace to ensure email and password only conisists of letters and numbers preg_replace('#[^A-Za-z0-9]#i','',
$login_user = $_POST["user_login"];
$login_password = $_POST["user_pass"];
// password is encryted in DB (MD5) therefore user inputted password will not match encryted password in DB - we have to assign new var
$decrypted_password = md5($login_password);
// Query which finds user (if valid) from DB - Achieving authentication via username and password
$user_query = mysqli_query($connect, "SELECT * FROM users WHERE email = '$login_user' AND password = '$decrypted_password' AND closed = 'no' LIMIT 1");
$check_user = mysqli_num_rows($user_query); // checking to see if there is infact a user which those credentials in the DB
if ($check_user==1){
while ($row = mysqli_fetch_array($user_query)){
$id = $row['user_id'];
}
enter code here
// if the user credentials are correct, log the user in:
$_SESSION["user_login"] = $login_user;
header( "Location: profile_student.php" ); // refresh page
exit;
// if user row does not equal 1 ...
//exit;
} else {
echo "<div class='wrong_login'>
<p> Email or password is incorrect, please try again. </p>
</div>";
}
}
?>
<h1> Log In </h1>
<hr>
<div class ="login_form">
<form action="sign_up.php" method="POST">
<input type="text" name="user_login" placeholder="Email" pattern="[a-z0-9._%+-]+@aston.ac.uk" required/><br/><br/>
<input type="text" name="user_pass" placeholder="Password" required/> <br/><br/>
<input type="submit" name="login_submit" value="Log In"/>
</form>
</div>
</div>
首页.php
<?php
session_start();
if (!isset($_SESSION["user_login"])) {
header("Location: profile_student.php");
} else {
$username = $_SESSION["user_login"];
}
include ("connect.php");
echo "Hello,";
echo"<br/> Would you like to logout? <a href = 'logout.php'>LogOut</a>";
?>
profile_student.php
这是用户登录时的页面，此页面将允许他们访问他们的信息等。
<?php
session_start();
if (!isset($_SESSION["user_login"])) {
header("Location: sign_up.php");
} else {
$username = $_SESSION["user_login"];
}
include ("includes/connect.php");
?>
注销.php
这是我网站的注销代码
<?php
session_start();
session_destroy();
unset($_SESSION);
session_write_close();
header( "Location: ../index.php" );
die;
?>
不要在每个
页面中执行session_start，而是创建一个通用.php文件并将此文件包含在所有必需的页面中。另外，您需要确保在会话启动之前没有空格，否则它会抛出标头已发送错误！
你是真的，问题是标题。
你正在创造一个无限循环说：你来sign_up？如果$_SESSION['user_login']不存在，请转到sign_up。它一遍又一遍地重复。因为$_SESSION['user_login']不能在你第一次上sign_up时存在。
所以只需这样做：在您的sign_up页面上。
<?php
session_start();
因此，请删除if / else条件。