在我的注册表单中，我会在用户提交所有数据后自动将用户登录。在将数据提交到数据库之后，我运行查询以从数据库中获取数据并将其存储在会话变量中。问题是while循环只存储第一个变量，即用户ID，而不存储其余变量。我做错了什么？
if ($signup) {
//user clicked the register button
if (isset($username, $em, $pass, $pass2, $fn, $ln, $sex, $bd_day, $bd_month, $bd_year)) {
//if all of these have a value
if ($pass == $pass2) {
//if the passwords match
$sql = mysqli_num_rows(mysqli_query($con, "SELECT * FROM users WHERE username = '$username'"));
//check if username is already taken
if ($sql < 1) {
//if the username hasn't been taken
$sql2 = mysqli_num_rows(mysqli_query($con, "SELECT * FROM users WHERE email = '$em'"));
//check if the email is taken
if ($sql2 < 1) {
//the email hasn't been taken
if (strlen($pass) > 5) {
//password is more than 5 characters
$pass = md5($pass);
//md5 is not secure!!! use something else later
if (strlen($username) > 4) {
//username is bigger than 4 characters
$query = mysqli_query($con, "INSERT INTO users (username, email, first_name, last_name, sex, bd_month, bd_year, bd_day, password, profile_pic, signup_date, activated, cover_photo) VALUES ('$username','$em','$fn', '$ln', '$sex', '$bd_month', '$bd_year', '$bd_day', '$pass', 'profilepic/default.png','$date)','0', 'coverphoto/defaultcover.jpg')") or die(mysqli_error($con));
//insert into db
$sql3 = mysqli_query($con, "SELECT * FROM users WHERE username = '$username' AND email = '$em'") or die(mysqli_error($con));
//select values from db for login
$num = mysqli_num_rows($sql3);
//check how many hits the query gets it should be 1
if ($sql3 == true && $num > 0) {
//check if query was a success and that there is a user with those credentials
while ($row = mysqli_fetch_assoc($sql3))
//log user in
$_SESSION['id'] = $row['id'];
echo $_SESSION['id'] . '<br>';
$_SESSION['un'] = $row['username'];
echo $_SESSION['un']. '<br>';
$_SESSION['fn'] = $row['first_name'];
echo $_SESSION['fn'] . '<br>';
$_SESSION['ln'] = $row['last_name'];
echo $_SESSION['ln'] . '<br>';
$_SESSION['em'] = $row['email'];
echo $_SESSION['em'] . '<br>';
$_SESSION['pp'] = $row['profile_pic'];
echo $_SESSION['pp'] . '<br>';
$_SESSION['signup_date'] = $row['signup_date'];
$_SESSION['active'] = $row['activated'];
setcookie('un', $username, time()+3600*60*24*7*4);
echo "You have been logged in.";
exit();
} else {
echo "An unknown error occurred";
exit();
}
} else {
//username is less than 4 characters
echo "Your username must be larger than 4 characters!";
exit();
}
} else {
//password is less than 5 characters
echo "You password must be more than 5 characters long<br />";
exit();
}
} else {
//email is already taken
echo "That email has already been taken!";
exit();
}
} else {
//username is already taken
echo "That username is already taken!";
exit();
}
} else {
//the passwords don't match
echo "You passwords don't match";
exit();
}
} else {
//user didn't submit the form
echo "Please fill in all the fields";
exit();
}
} else {
//user didn't click the register button
}
最后它确实回显你已登录。另外，我回显了会话变量中的值以进行测试，但所有返回值都是<br>而不是实际值，除了用户ID开始。我也没有任何错误。
请帮帮我。
答案 0 :(得分：1)
while ($row = mysqli_fetch_assoc($sql3))
您忘记添加{，并且在循环结束时似乎也是}。
因此，只有第一个命令在循环中发生并执行。
另一件事，循环后的“其他” - 它与哪种条件有关？
通常我认为缩进是好的，但你把它放得太远了。 也许，而不是嵌套太多的条件和循环，找到另一种方法。