Contact form error on submit - php

Question

I've built a basic contact form using the following:
<?php
$name = $_POST['name'];
$email = $_POST['email'];
$contact = $_POST['contact'];
$message = $_POST['message'];
$from = 'From: Contact';
$to = 'info#mydomain.com';
$subject = 'message';
$body = "From: $name\n E-Mail: $email\n Contact Number: $contact\n Message:\n $message";
?>
<form id="contact-1" method="post">
<label>Name</label>
<input name="name" placeholder="YOUR NAME">
<label>Email</label>
<input name="email" type="email" placeholder="EMAIL ADDRESS">
<label>Contact Number</label>
<input name="contact" type="tel" placeholder="TELEPHONE">
<label>Message</label>
<textarea name="message" placeholder="MESSAGE"></textarea>
<input id="submit" name="submit" type="submit" value="Submit">
</form>
<?php
if ($_POST['submit'] ) {
if (mail ($to, $subject, $body, $from)) {
echo '<p>Your message has been submitted</p>';
} else {
echo '<p>Something went wrong, please try again!</p>';
}
}
?>
If you leave the name input blank and submit the form, its successful. However, if I add anything the name input. the form doesnt send and the site loads a 'page not found'.

Answer 1

Add type="text" into first input element.

Answer 2

This code appeared to have worked for me, test it out and see if the mail sends properly.
I added the
type="text"
to Name, and added
isset()
around
$_POST['submit']
I enclosed the top potion with
if (isset($_POST['submit']) ) {
To avoid errors before the page is first submitted.
<?php
if (isset($_POST['submit']) ) {
$name = $_POST['name'];
$email = $_POST['email'];
$contact = $_POST['contact'];
$message = $_POST['message'];
$from = 'From: Contact';
$to = 'info#mydomain.com';
$subject = 'message';
$body = "From: $name\n E-Mail: $email\n Contact Number: $contact\n Message:\n $message";
}
?>
<form id="contact-1" method="post">
<label>Name</label>
<input type="text" name="name" placeholder="YOUR NAME">
<label>Email</label>
<input name="email" type="email" placeholder="EMAIL ADDRESS">
<label>Contact Number</label>
<input name="contact" type="tel" placeholder="TELEPHONE">
<label>Message</label>
<textarea name="message" placeholder="MESSAGE"></textarea>
<input id="submit" name="submit" type="submit" value="Submit">
</form>
<?php
if (isset($_POST['submit'])) {
if (mail ($to, $subject, $body, $from)) {
echo '<p>Your message has been submitted</p>';
} else {
echo '<p>Something went wrong, please try again!</p>';
}
}
?>