PHP form validation not working on submit - php

Question

I have an HTML form that links to a php file. When I click submit the form sends and I get an email. However, if the form is empty and I click submit it still redirects to the homepage.
form HTML:
<form class="form-horizontal" role="form" method="post" action="contact.php">
<div class="form-group">
<label for="name" class="col-sm-2 control-label">Name</label>
<div class="col-sm-10">
<input type="text" class="form-control" id="name" name="name" placeholder="First & Last Name">
</div>
</div>
<div class="form-group">
<label for="telephone" class="col-sm-2 control-label">Phone</label>
<div class="col-sm-10">
<input type="telephone" class="form-control" id="telephone" name="telephone" placeholder="Phone Number" >
</div>
</div>
<div class="form-group">
<label for="email" class="col-sm-2 control-label">Email</label>
<div class="col-sm-10">
<input type="email" class="form-control" id="email" name="email" placeholder="example#domain.com" >
</div>
</div>
<div class="form-group">
<label for="dropdown" class="col-sm-2 control-label">Select One:</label>
<div class="col-sm-10">
<select name="select" class="form-control" id="dropdown">
<option>Driver</option>
<option>Advertiser</option>
</select>
</div>
</div>
<div class="form-group">
<label for="message" class="col-sm-2 control-label">Message</label>
<div class="col-sm-10">
<textarea class="form-control" rows="4" name="message"></textarea>
</div>
</div>
<div class="form-group">
<div class="col-sm-10 col-sm-offset-2">
<input id="submit" name="submit" type="submit" value="Send" class="btn btn-primary">
</div>
</div>
<div class="form-group">
<div class="col-sm-10 col-sm-offset-2">
</div>
</div>
</form>
contact.php
<?php
if (isset($_POST["submit"])) {
$name = $_POST['name'];
$email = $_POST['email'];
$telephone= $_POST['telephone'];
$select = $_POST['select'];
$message = $_POST['message'];
$from = 'Contact Form';
$to = 'myemail#gmail.com';
$subject = 'Message from Contact Form';
$body ="From: $name\n E-Mail: $email\n Telephone: $telephone\n Select: $select\n Message:\n $message";
// Check if name has been entered
if (!$_POST['name']) {
$errName = 'Please enter your name';
}
// Check if email has been entered and is valid
if (!$_POST['email'] || !filter_var($_POST['email'], FILTER_VALIDATE_EMAIL)) {
$errEmail = 'Please enter a valid email address';
}
//Check if message has been entered
if (!$_POST['message']) {
$errMessage = 'Please enter your message';
}
// If there are no errors, send the email
if (!$errName && !$errEmail && !$errMessage && !$errTel) {
if (mail ($to, $subject, $body, $from)) {
$result='<div class="alert alert-success">Thank You! I will be in touch</div>';
} else {
$result='<div class="alert alert-danger">Sorry there was an error sending your message. Please try again later.</div>';
}
}
{
// To redirect form on a particular page
header("Location:http://www.mywebsite.co");
}
}
?>
Any idea on why my validation is not working?
Thank you.

Answer 1

you have two extra brackets in yor code, this:
{
// To redirect form on a particular page
header("Location:http://www.mywebsite.co");
}
should just be:
// To redirect form on a particular page
header("Location:http://www.mywebsite.co");
you were closing your if block and opening an empty block.

Answer 2

You may wanna recheck this part:
{
// To redirect form on a particular page
header("Location:http://www.mywebsite.co");
}
Also, you should also use trim function on your POST data.
contact.php
if (isset($_POST["submit"])) {
$name = trim($_POST['name']);
$email = trim($_POST['email']);
$telephone = trim($_POST['telephone']);
/* Other code */
if (!$errName && !$errEmail && !$errMessage && !$errTel) {
if (mail ($to, $subject, $body, $from)) {
$result='<div class="alert alert-success">Thank You! I will be in touch</div>';
} else {
$result='<div class="alert alert-danger">Sorry there was an error sending your message. Please try again later.</div>';
}
} else {
// To redirect form on a particular page
header("Location:http://www.mywebsite.co");
}