Hello
I'm trying to validate a form in different files, but I can not pass the error messages between them.
In index.php I have the form code:
<!DOCTYPE html>
<html>
<head>
<title>Great Train Journeys</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial- scale=1.0">
<link rel="stylesheet" href="css/style.css">
<script src="js/jquery-3.1.0.min.js" type="text/javascript"></script>
<script src="js/scripts.js" type="text/javascript"></script>
</head>
<body>
<div id="container">
<ul class="nav">
<li><a href="index.php">home</a></li>
<li>
<a href="#">destinations</a>
<div>
<div class="nav-column">
<h3>uk & ireland</h3>
<ul>
<li> <a href="#">England</a> </li>
<li> <a href="#">Ireland</a> </li>
<li> <a href="#">Scotland</a> </li>
<li> <a href="#">Wales</a> </li>
</ul>
<h3>mainland europe</h3>
<ul>
<li> <a href="#">Austria</a> </li>
<li> <a href="#">Belgium</a> </li>
<li> <a href="#">Bosnia & Herzegovina</a> </li>
<li> <a href="#">Bulgaria</a> </li>
<li> <a href="#">Croatia</a> </li>
<li> <a href="#">Czech Republic</a> </li>
<li> <a href="#">Denmark</a> </li>
<li> <a href="#">Estonia</a> </li>
<li> <a href="#">Finland</a> </li>
<li> <a href="#">France</a> </li>
<li> <a href="#">Germany</a> </li>
<li> <a href="#">Greece</a> </li>
<li> <a href="#">Hungary</a> </li>
<li> <a href="#">Italy</a> </li>
<li> <a href="#">Latvia</a> </li>
<li> <a href="#">Lithuania</a> </li>
<li> <a href="#">Luxembourg</a> </li>
</ul>
</div>
<div class="nav-column">
<h3>mainland europe cont...</h3>
<ul>
<li> <a href="#">Macedonia</a> </li>
<li> <a href="#">Montenegro</a> </li>
<li> <a href="#">Norway</a> </li>
<li> <a href="#">Poland</a> </li>
<li> <a href="#">Portugal</a> </li>
<li> <a href="#">Roménia</a> </li>
<li> <a href="#">Russia</a> </li>
<li> <a href="#">Serbia</a> </li>
<li> <a href="#">Slovakia</a> </li>
<li> <a href="#">Slovenia</a> </li>
<li> <a href="#">Spain</a> </li>
<li> <a href="#">Sweden</a> </li>
<li> <a href="#">Switzerland</a> </li>
<li> <a href="#">The Netherlands</a> </li>
<li> <a href="#">Turkey</a> </li>
<li> <a href="#">Ukraine</a> </li>
</ul>
</div>
<div class="nav-column">
<h3>north america</h3>
<ul>
<li> <a href="#">Alaska</a> </li>
<li> <a href="#">Canada</a> </li>
<li> <a href="#">Mexico</a> </li>
<li> <a href="#">United States</a> </li>
</ul>
<h3>central america</h3>
<ul>
<li> <a href="#">Guatemala</a> </li>
<li> <a href="#">Costa Rica</a> </li>
<li> <a href="#">Cuba</a> </li>
<li> <a href="#">Panama</a> </li>
<li> <a href="#">St Kitts and Nevis</a> </li>
</ul>
<h3>south america</h3>
<ul>
<li> <a href="#">Argentina</a> </li>
<li> <a href="#">Brazil</a> </li>
<li> <a href="#">Bolívia</a></li>
<li> <a href="#">Chile</a> </li>
<li> <a href="#">Colombia</a></li>
<li> <a href="#">Ecuador</a></li>
<li> <a href="#">Paraguay</a></li>
<li> <a href="#">Peru</a></li>
<li> <a href="#">Uruguay</a></li>
<li> <a href="#">Venezuela</a></li>
</ul>
</div>
<div class="nav-column">
<h3>africa</h3>
<ul>
<li> <a href="#">Egypt</a></li>
<li> <a href="#">Morocco</a> </li>
<li> <a href="#">Namibia</a></li>
<li> <a href="#">South Africa</a></li>
<li> <a href="#">Tunisia</a> </li>
<li> <a href="#">Tanzania</a></li>
<li> <a href="#">Zambia</a></li>
</ul>
</div>
<div class="nav-column">
<h3>asia</h3>
<ul>
<li> <a href="#">Bangladesh</a></li>
<li> <a href="#">Cambodia</a></li>
<li> <a href="#">China</a></li>
<li> <a href="#">India</a> </li>
<li> <a href="#">Indonesia</a></li>
<li> <a href="#">Japan</a></li>
<li> <a href="#">Laos</a></li>
<li> <a href="#">Myanmar</a></li>
<li> <a href="#">Nepal</a></li>
<li> <a href="#">Singapore</a></li>
<li> <a href="#">Thailand</a></li>
<li> <a href="#">Tanzania</a></li>
<li> <a href="#">Uzbekistan</a></li>
<li> <a href="#">Vietnam</a> </li>
</ul>
<h3>oceania</h3>
<ul>
<li> <a href="#">Australia</a></li>
<li> <a href="#">New Zealand</a> </li>
</ul>
</div>
</div>
</li>
<li><a href="#about">about</a></li>
<li><a href="#contact">contact</a></li>
</ul>
</div>
<section id="galeria">
<img class="slider fade" src="images/Flam Railway_small.jpg" alt=""/>
<img class="slider fade" src="images/rocky-mountaineer.jpg" alt="" title="Rocky Mountaineer"/>
<img class="slider fade" src="images/Hogwarts train.png" alt=""/>
<img class="slider fade" src="images/amtrak-starlight_small.jpg" alt=""/>
<img class="slider fade" src="images/hiram_bingham_720.jpg" alt=""/>
<img class="slider fade" src="images/rovos rail.jpg" alt=""/>
<img class="slider fade" src="images/Venice Simplon.jpg" alt=""/>
<img class="slider fade" src="images/the ghan.jpg" alt=""/>
<span id="prev">«</span>
<span id="next">»</span>
</section>
<section id="about">
<br>
<div id="aboutArticle">
<h3>Discover the world's greatest train journeys</h3>
<p id="p1">
Ever wondered where a train can take you, besides getting you to your workplace (if that's the case) ? <br><br>
There is another side of the story...across our beloved planet Earth, several trains meander through
viaducts, rivers, tunnels, glaciers and fjords, where beauty meets the eye. <br><br>
Several scenic train journeys can be found in every continent and that's what this site is all about...to showcase
every journey with a detailed description about it's points of interest, what to expect, what to see and guide
you through the magnificent views you will come across while looking through the window...<br><br>
So, why not take a vacation in Switzerland and get on the Glacier Express? <br>
Or cross Asia in the Trans-Siberian train? <br>
Ever heard of the Blue train or the Rovos rail, two magnificent african journeys? <br>
Or even the Flam Railway in Norway?<br><br>
Get on board and discover what a scenic train journey can offer you...the possibility to travel
several miles, while watching the beautiful landscapes go by. <br><br>
There's no other form of transportation that can offer travelling through majestic, inaccessible places.
<br>
</p>
</div>
</section>
<br>
<br>
<section id="contact">
<div id="contactForm">
<h3>Contact Us</h3>
<p>
If you wish to contact us about linking your site, copyright issues, feedback, errors on the website or any
other issue, please send us a message using the form below.<br>
We appreciate your contact in helping us improve your navigation experience.
</p>
<form id="form" name="contactForm" method="post" action="php/form.php">
<div>
<label for="name">Your name</label>
<input type="text" id="name" name="name" maxlength="40" placeholder="Write your Name" >
<span class="error"><?php echo $nameError; ?></span>
</div>
<div>
<label for="email">Your email</label>
<input type="email" id="email" name="user_mail" placeholder="[email protected]">
<span class="error"><?php echo $emailError; ?></span>
</div>
<div>
<label for="topic">Select Topic</label>
<select id="topic" name="topic">
<option selected disabled hidden value="">Choose a Topic</option>
<option value="link">Site Link</option>
<option value="copyright">Copyright</option>
<option value="errors">Site/Article errors</option>
<option value="feedback">Feedback</option>
<option value="other">Other</option>
</select>
<span class="error"><?php echo $topicError; ?></span>
</div>
<div>
<label for="msg">Your message</label>
<textarea id="msg" name="user_message" placeholder="Write your message"></textarea>
<span class="error"><?php echo $msgError; ?></span>
</div>
<div class="button">
<button type="submit" id="submit" name="submit" value="true">Submit</button>
<span class="success"></span>
</div>
</form>
</div>
</section>
<section id="footer">
<p>
O Lorem Ipsum é um texto modelo da indústria tipográfica e de impressão.
O Lorem Ipsum tem vindo a ser o texto padrão usado por estas indústrias
desde o ano de 1500, quando uma misturou os caracteres de um texto para
criar um espécime de livro. Este texto não só sobreviveu 5 séculos,
mas também o salto para a tipografia electrónica, mantendo-se
essencialmente inalterada. Foi popularizada nos anos 60 com a disponibilização
das folhas de Letraset, que continham passagens com Lorem Ipsum, e mais
recentemente com os programas de publicação como o Aldus PageMaker que
incluem versões do Lorem Ipsum.
</p>
</section>
<br>
<br>
<br>
<br>
<br>
</body>
</html>
And in form.php I validate input and insert into the database using prepared statements. It turns out that the error variables $ nameError, $ emailError, $ topicError, and $ msgError in index.php, do not show the messages to the user. The only message that appears is that these variables are not defined but this is easy to solve by declaring them in index.php but this is not what I want because I can undo the error of "undefined variable" although without doing the validation of form fields.
Here is the code for form.php
<?php
$servername = "localhost:3306";
$username = "root";
$password = "";
$dbname = "site_comboios";
$name = $_POST['name'];
$email = $_POST['user_mail'];
$topic = $_POST['topic'];
$msg = $_POST['user_message'];
$nameError = "";
$emailError = "";
$topicError = "";
$msgError = "";
if( !empty( $_POST['submit'])) {
if(empty( $name) || !isset($name) ) {
$nameError = "Name is required" ;
}
if(empty( $email) || !isset($email)) {
$emailError = "Email is required";
} elseif(filter_var($email,FILTER_VALIDATE_EMAIL)) {
$emailError = "Please insert a correct email address";
}
if(empty( $topic) || !isset($topic) ) {
$topicError = "Please choose a topic";
}
if(empty( $msg) || !isset($msg) ) {
$msgError = "Let us know your opinion";
}
}
//Create connection to database
$mysqli = new mysqli($servername, $username, $password, $dbname);
//check connection
if($mysqli->connect_errno) {
echo 'Error connecting to database';
}
//Prepared Statement
$stmt = $mysqli->prepare("INSERT INTO contacts(Nome, Email, Topico, Mensagem) VALUES(?, ?, ?, ?)" );
$stmt->bind_param('ssss', $name, $email, $topic, $msg);
$stmt->execute();
I've tried using the superglobal $ _SESSION to pass variables but it did not work.
What method can I use to do this form validation?
