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我正在製作一個表格，希望在勾選或選中該複選框時可以提交表格。當我登錄不從這個只有當您打勾複選框時纔會使用表格
注意除了檢查箱子我沒有得到任何其他錯誤：未定義指數：stayLoggedIn在/ home /網站/ 2A/d/dbcf5d6440 /的public_html/MySQL的/挑戰/ Secretdiary .php 91行
這是我的代碼！
<?php
session_start();
$error="";
if (array_key_exists("logout", $_GET)) {
unset($_SESSION);
setcookie("id", "", time() - 60*60);
$_COOKIE["id"] = "";
} else if(array_key_exists("id", $_SESSION) OR array_key_exists("id", $_COOKIE)) {
header("Location: loggedinpage.php");
}
if(array_key_exists("submit", $_POST)) {
$link = mysqli_connect("XXX", "XXX", "XXX", "XXX");
if (mysqli_connect_error()) {
die("Database Connection Error");
}
if(!$_POST['email']) {
$error.= "An Email Address is required<br>";
}
if(!$_POST['password']) {
$error.= "A Password is required<br>";
}
if($error != "") {
$error = "<p>There were error(s) in your form</p>".$error;
} else {
if($_POST['signUp'] == '1') {
$query = "SELECT id FROM `users` WHERE email = '".mysqli_real_escape_string($link, $_POST['email'])."' LIMIT 1";
$result = mysqli_query($link, $query);
if (mysqli_num_rows($result) > 0) {
$error = "That email address is taken.";
} else {
$query = "INSERT INTO `users` (`email`, `password`) VALUES('".mysqli_real_escape_string($link, $_POST['email'])."', '".mysqli_real_escape_string($link, $_POST['password'])."')";
if (!mysqli_query($link, $query)) {
$error="<p>Could not sign you up, please try again</p>";
} else {
$query = "UPDATE `users` SET password = '".md5(md5(mysqli_insert_id($link)).$_POST['password']). "' WHERE id = ".mysqli_insert_id($link)." LIMIT 1";
mysqli_query($link, $query);
$_SESSION['id'] = mysqli_insert_id($link);
if ($_POST['stayLoggedIn'] == '1') {
setcookie("id", mysqli_insert_id($link), time() + 60*60*24*365);
}
} header("Location: loggedinpage.php");
}
} else {
$query = "SELECT * FROM `users` WHERE email = '".mysqli_real_escape_string($link, $_POST['email'])."'";
$result = mysqli_query($link, $query);
$row = mysqli_fetch_array($result);
if (array_key_exists("id", $row)) {
$hashedPassword = md5(md5($row['id']).$_POST['password']);
if ($hashedPassword == $row['password']) {
$_SESSION['id'] = $row['id'];
if ($_POST['stayLoggedIn'] == '1') {
setcookie("id", $row ($link), time() + 60*60*24*365);
}
}
}
}
}
}
?>
<div id="error"><?php echo $error; ?></div>
<form method="post">
<input type="email" name="email" placeholder="Your Email Eg. [email protected]">
<input type="password" name="password" placeholder="Password">
<input type="checkbox" name="stayLoggedIn" value=1>
<input type="hidden" name="signUp" value="1">
<input type="submit" name="submit" value="Sign Up!">
</form>
<form method="post">
<input type="email" name="email" placeholder="Your Email Eg. [email protected]">
<input type="password" name="password" placeholder="Password">
<input type="checkbox" name="stayLoggedIn" value=1>
<input type="hidden" name="signUp" value="0">
<input type="submit" name="submit" value="Log In!">
</form>
當您提交表單沒有檢查它的價值就不會被提交，這樣你就沒有任何$ _ POST [「stayLoggedIn」]和複選框修復它檢查它是否存在使用isset（$ _ POST ['stayLoggedIn'））返回true或false –
我希望你意識到你有更大的問題，而不僅僅是一個複選框的問題，但沒有人抓住這一點。你比這更需要複雜化。 –
MD5不足以進行密碼散列。使用['password_hash（）']（http://us3.php.net/manual/en/function.password-hash.php）和['password_verify（）']（http://us3.php.net/ manual/en/function.password-verify.php）。 –