每当我在表单中提交某些内容时,我想检查是否有任何字段为空.到目前为止,我所拥有的不起作用
$firstname = $_POST['firstname'];
$lastname = $_POST['lastname'];
$username = $_POST['username'];
$password = $_POST['password'];
$passwordconf = $_POST['passwordconf'];
$email = $_POST['email'];
$securityq = $_POST['securityq'];
$qanswer = $_POST['qanswer'];
if(empty($firstname) || empty($lastname) || empty($username) || empty($password) || empty($passwordconf) || empty($email) || empty($securityq) || empty($qanswer))
{
echo "You did not fill out the required fields.";
}
和形式
<form name="registrationform" action="register.php">
First Name:<input type="text" name="firstname">
Last Name:<input type="text" name="lastname">
Email:<input type="text" name="email">
Username:<input type="text" name="username">
Password:<input type="password" name="password">
Confirm Password:<input type="password" name="passwordconf">
Security Question:<input type="text" name="securityq"> …我正在为我的网站构建一个登录系统,我需要一种方法来检查表单中的所有字段是否都填写完毕.我也遇到错误消息的问题,说我的电子邮件格式不正确.
<?php
$con = mysql_connect(localhost, 262096, 9201999);
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("262096", $con);
$firstname = $_POST['firstname'];
$lastname = $_POST['lastname'];
$username = $_POST['username'];
$password = $_POST['password'];
$passwordconf = $_POST['passwordconf'];
$email = $_POST['email'];
$securityq = $_POST['securityq'];
$qanswer = $_POST['qanswer'];
if(empty($firstname) || empty($lastname) || empty($username) || empty($password) ||
empty($passwordconf) || empty($email) || empty($securityq) || empty($qanswer))
{
echo "You did not fill out the required fields.";
}
$uname = "SELECT * FROM users WHERE username='{$username}'";
$unamequery = mysql_query($uname) …所以我试图使用我制作的这个登录系统，它开始给我一些奇怪的错误。我发现这是因为 MySQL 没有启动。所以我试图启动它，但它不会。这是日志：
10:06:12 PM [mysql] Attempting to start MySQL app...
10:06:12 PM [mysql] Status change detected: running
10:06:13 PM [mysql] Status change detected: stopped
10:06:13 PM [mysql] Error: MySQL shutdown unexpectedly.
10:06:13 PM [mysql] This may be due to a blocked port, missing dependencies,
10:06:13 PM [mysql] improper privileges, a crash, or a shutdown by another method
10:06:13 PM [mysql] Check the "/xampp/mysql/data/mysql_error.log" file
10:06:13 PM [mysql] and the Windows Event Viewer for more clues
以下是错误日志 (mysql_error.log) 中一些更值得注意的行：
130318 …我不断收到此错误消息，但不知道为什么。这是一个登录脚本，我在这里复制了表单，因为我不知道如何使用 PHPASS 进行登录。这是我的代码：
$email = ($_POST['email']);
$pass = ($_POST['pass']);
require 'connect.php';
require 'PasswordHash.php';
$hash = '*';
$login = $con->prepare("SELECT password FROM basicuserinfo WHERE email=:email");
$login->bindParam(':email', $email);
$login->execute();
$login->bind_result($hash);
if (!$login->fetch() && $con->errno)
die();
if ($hasher->CheckPassword($pass, $hash)) {
$what = 'Authentication succeeded';
} else {
$what = 'Authentication failed';
}
unset($hasher);
我正在尝试检查是否已使用PDO注册了电子邮件，但是到目前为止，我还没有找到一种很好的方法来进行此操作。到目前为止，这就是我所拥有的。如果有帮助，则连接变量为“ $ con”。另外，我是否需要在同一文档中使用连接变量，还是在包含的文档中使用它？
<link rel="stylesheet" type="text/css" href="css\errors.css">
<?php
require 'header.php';
if (!$_POST['submit']) {
?>
<html>
<a href="register.html">Regsiter here!</a>
<?php
} else {
require 'connect.php';
$firstname = ($_POST['firstname']);
$lastname = ($_POST['lastname']);
$email = ($_POST['email']);
$password = ($_POST['password']);
$passwordconf = ($_POST['passwordconf']);
$errorfields = "<p class='errormsg'>Please fill out all the fields!</p>";
if (empty($firstname) || empty($lastname) || empty($email) || empty($password) || empty($passwordconf)) {
echo "$errorfields";
}
$erroremail = "<p class='errormsg'>Email is not in name@domain format!</p>";
$regex = "/^[a-z0-9]+([_.-][a-z0-9]+)*@([a-z0-9]+([.-][a-z0-9]+)*)+.[a-z]{2,}$/i";
if (!preg_match($regex, $email)) {
echo "$erroremail"; …