无法通过mysql数据库上的php创建帐户
[英]fail to create account via php on mysql database
问题描述
I´m having trouble creating data onto a MySQL database via a php that I created in order to be able to create an account on a website I´m making I have the following php files that take care of the process (linked below), I have been looking to these lines of code for hours and I'm not able to figure out what is wrong with it .... 
我无法通过自己创建的php在MySQL数据库上创建数据，以便能够在我正在制作的网站上创建帐户。我有以下php文件负责处理该过程（如下链接），我一直在寻找这些代码行达数小时之久，而我却无法找出问题出在哪里.....
signup.php signup.php
<?php
require 'db.php';
session_start();
?>
<!DOCTYPE html>
<html>
<head>
<title>AlojArt Reservas</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<!-- Bootstrap -->
<link href="bootstrap/css/bootstrap.min.css" rel="stylesheet">
<!-- styles -->
<link href="css/styles.css" rel="stylesheet">
<!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
<script src="https://oss.maxcdn.com/libs/respond.js/1.3.0/respond.min.js"></script>
<![endif]-->
</head>
<?php
if ($_SERVER['REQUEST_METHOD'] == 'POST')
{
if (isset($_POST['login'])) { //user logging in
require 'login.php';
}
elseif (isset($_POST['register'])) { //user registering
require 'register.php';
}
}
?>
<body class="login-bg">
<div class="header">
<div class="container">
<div class="row">
<div class="col-md-12">
<!-------------------- Logo -------------------->
<div class="logo">
<h1><a href="index.php">AlojArt Reservas</a></h1>
</div>
</div>
</div>
</div>
</div>
<div class="page-content container">
<div class="row">
<div class="col-md-4 col-md-offset-4">
<div class="login-wrapper">
<div id="register">
<div class="box">
<form action="signup.php" method="post" autocomplete="off">
<div class="content-wrap">
<h6>Criar conta</h6>
<input class="form-control" type="text" placeholder="Nome" name="nome_titular">
<input class="form-control" type="text" placeholder="Nome de utilizador " name="username">
<input class="form-control" type="password" placeholder="Palavra-passe" name="password">
<input class="form-control" type="email" placeholder="Endereço de e-mail" name="email">
<div class="action">
<button class="btn btn-primary btn-lg" name="register" />Criar conta</button>
</div>
</div>
</form>
</div>
</div>
<div class="already">
<div id="login">
<p>Já tem conta?</p>
<a href="index.php">Iniciar sessão</a>
</div>
</div>
</div>
</div>
</div>
</div>
<!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
<script src="https://code.jquery.com/jquery.js"></script>
<!-- Include all compiled plugins (below), or include individual files as needed -->
<script src="bootstrap/js/bootstrap.min.js"></script>
<script src="js/custom.js"></script>
</body>
</html>
register.php register.php
<?php
require 'db.php';
session_start();
$_SESSION['nome_titular'] = $_POST['nome_titular'];
$_SESSION['username'] = $_POST['username'];
$_SESSION['password'] = $_POST['password'];
$_SESSION['email'] = $_POST['email'];
// Escape all $_POST variables to protect against SQL injections
$nome_titular = $mysqli->escape_string($_POST['nome_titular']);
$username = $mysqli->escape_string($_POST['username']);
$email = $mysqli->escape_string($_POST['email']);
$password = $mysqli->escape_string(password_hash($_POST['password'], PASSWORD_BCRYPT));
// Check if user with that email already exists
$result = $mysqli->query("SELECT * FROM Utilizador WHERE email='$email'") or die($mysqli->error());
// We know user email exists if the rows returned are more than 0
if ( $result->num_rows > 0 ) {
$_SESSION['message'] = 'O utilizador jรก existe!';
header("location: error.php");
}
else { // User doesn't already exist in a database, proceed...
$sql = "INSERT INTO Utilizador (nome_titular, username, email, password)"
. "VALUES ('$nome_titular','$username','$email','$password')";
// Add user to the database
if ( $mysqli->query($sql) ){
$_SESSION['logged_in'] = true;
header("location: dashboard.php");
}
else {
$_SESSION['message'] = "O registo falhou!";
header("location: error.php");
}
}
?>
EDIT: added db.php 编辑：添加了db.php
db.php db.php
<?php
/* Database connection settings */
$host = 'CENSORED';
$user = 'CENSORED';
$pass = 'CENSORED';
$db = 'projeto2_dcw';
$mysqli = new mysqli($host,$user,$pass,$db) or die($mysqli->error);
?>
2 个解决方案
解决方案1
0 已采纳 2018-01-26 04:24:57
I see there is no space ' ' before VALUES , this would cause failure of SQL. 我看到VALUES之前没有空格' ' ，这将导致SQL失败。
Change your SQL to 将您的SQL更改为
$sql = "INSERT INTO Utilizador (nome_titular, username, email, password)"
. " VALUES ('$nome_titular','$username','$email','$password')";
If you still getting unexpected result, then please put following code to else get the error and comment out everything else. 如果仍然得到意外的结果，请输入以下代码以获取else错误并注释掉所有其他内容。
printf("Error: %s\n", $mysqli->error);
==Update== ==更新==
"Error: Duplicate entry '0' for key 'PRIMARY"
It refers to primary key constraint violation, in other word, you are trying to insert new value 0 , which is already present in same column. 它指的是违反primary key约束，换句话说，您试图插入新值0 ，该值已经存在于同一列中。 Since, primary key doesn't allow duplicate. 因为， primary key不允许重复。 It is failing and falling to else block. 它正在失败，并陷入else障碍。 To correct this issue, you need to make sure, you don't have duplicate entry for column which has primary key . 要更正此问题，您需要确保没有具有primary key列的重复条目。
解决方案2
0 2018-01-26 04:27:37
I see there is no connection for your page thats why it gets redirected to error.php change your db connection to this 我看到您的页面没有连接，这就是为什么它被重定向到error.php将您的数据库连接更改为此
<?php
$host = 'CENSORED';
$user = 'CENSORED';
$pass = 'CENSORED';
$db = 'projeto2_dcw';
$con = mysqli_connect("$host,$user,$pass,$db") or die($mysqli->error);
mysqli_select_db($con,"your db name");
?>
in the form change button <button type="submit" class="btn btn-primary btn-lg" name="register" />Criar conta 在表单更改按钮中<button type="submit" class="btn btn-primary btn-lg" name="register" />Criar
ALTER TABLE Your table name
ADD PRIMARY KEY (ID);
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