PHP Contact Form Not Sending Email - php

Question

I'm writing to create a contact form on my website and then get the information sent to my inbox, however it is not working whatsoever. Please take a look at my code below (PHP is not my thing) and let me know where i've gone wrong.
Here's the PHP script:
<?php
$to = 'example#gmail.com';
$name = $_POST['name'];
$email = $_POST['email'];
$message = $_POST['message'];
$tel = $_POST['tel'];
$project = $_POST['project'];
$range1 = $_POST['range1'];
$range2 = $_POST['range2'];
$body = <<<EMAIL
Hi, my name is $name.
I'd like to discuss the possibility of working together on a $project.
My budget for the project is £$range1 and I would like to complete the project within $range2 Month(s).
Additional Information:
$message
Regards, $name
<hr>
$name
$email
$tel
EMAIL;
$header = "From: $email";
if($_POST['send']){
mail($to, $subject, $body, $header);
$feedback = 'Thank you for your message, we will get back to you shortly.';
}
?>
And here's the HTML form:
<form id="form_id" name="form_name" action="" method="post">
<div>
<input type="text" name="name" id="name" placeholder="Name" required/>
</div>
<div>
<input type="email" name="email" id="email" placeholder="Email" required/>
</div>
<div>
<input type="tel" name="tel" id="tel" placeholder="Phone" required/>
</div>
<div>
<select required id="project">
<option selected>Select type of project…</option>
<option value="Responsive Website">Responsive Web Design</option>
<option value="Graphic Design">Graphic Design</option>
<option value="Motion Graphics">Motion Graphics</option>
</select>
</div>
<div>
<label for="range1">Budget: </label>
<input type="range" name="range1" id="range1" min="400" max="2000" step="50" value="6" required onchange="rangevalue.value=value"><output id="rangevalue">400</output>
</div>
<div>
<label for="range2">Timeframe: </label>
<input type="range" name="range2" id="range2" min="1" max="12" step=".5" value="1" required onchange="rangevalue1.value=value"><output id="rangevalue1">1</output>
</div>
<div>
<label for="message">Additional Information: </label><br/>
<p>(Please use this space to tell us about your company, the main objectives of the proposed website and anything else you think might be useful)</p>
<textarea name="message" id="message" rows="5" cols="30" placeholder="Message" required></textarea>
</div>
<div>
<input type="submit" name="submit" value="submit" />
</div>
</form>
<p id="feedback"><?php echo $feedback; ?></p>
Thanks for the help. FYI this can be achieved easily with WordPress through Contact Form 7 (or a similar plugin).

Answer 1

<input type="submit" name="submit" value="submit" />
You have to change this line to:
<input type="submit" name="send" value="submit" />
if($_POST['send']){
actually checking if submit button is clicked...
And, yes - if html and php are on different pages, you have to set proper form action link...

Answer 2

I think you should take a look at this or this, be aware that despite W3Schools may serve as a basics tutorial because of the friendly-user examples, always complement with other resources look here why.
Then you can take a look at this answers, this is just because you need some more basis to understand everything you are doing.
I can't see your $_POST['send'] name in the form, or it's just too late and I'm tired:
Don't know, but maybe, you want this in your form before the submit:
<input type="hidden" name="send" >
Then:
I already posted this answer HERE, but here it is:
First i think your missing some headers look at those
// To send HTML mail, the Content-type header must be set
$headers = 'MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";
// Additional headers
$headers .= 'To: Mary <mary#example.com>, Kelly <kelly#example.com>' . "\r\n";
$headers .= 'From: Birthday Reminder <birthday#example.com>' . "\r\n";
$headers .= 'Cc: birthdayarchive#example.com' . "\r\n";
$headers .= 'Bcc: birthdaycheck#example.com' . "\r\n";
2nd check if its true or false when calling the mail function
if( mail($email_to, $email_subject, $email_message, $headers)!==true)
{
die('Fail to send');
}
die('Success');
}
You should take a look at the isset() function to make sure all your variables are set from the form.