This should work for you: (Change the XXXXXX's to your email address).
<?php
if (isset($_POST['submit'])) {
// check form fields are filled in
if(empty($_POST['name']) || empty($_POST['email']) || empty($_POST['phone']) || empty($_POST['zip']) || empty($_POST['budget'])) {
$error = "Please supply the required information";
}
// check to see if checkbox has been selected
elseif(!isset($_POST['projectType'])) {
$error = "Please supply the required information";
}
else {
// get name
$name = trim($_POST['name']);
// get email address
$email = trim($_POST['email']);
// get phone number
$phone = trim($_POST['phone']);
// get zip
$zip = trim($_POST['zip']);
// get project type
$projectType = trim($_POST['projectType']);
// get budget
$budget = trim($_POST['budget']);
//build message
$to = "XXXX@XXXXXXXXX.XX.XX";
$subject = "Comments from website";
$headers = "From: $email\r\n";
$headers .= "Reply-To: $email\r\n";
$message = "Name: $name\n\n";
$message .= "Email Address: $email\n\n";
$message .= "Phone No: $phone\n\n";
$message .= "Zip: $zip\n\n";
$message .= "Project Type: $projectType\n\n";
$message .= "Budget: $budget\n\n";
mail($to, $subject, $message, $headers);
$sent = "Mail was sent successfully";
}
}
?>
<!DOCTYPE HTML>
<html>
<head>
<meta charset="UTF-8">
<title>Website Form</title>
</head>
<body>
<?php
if(isset($sent)) {
echo "<h3>$sent</h3>";
}
if(isset($error)) {
echo "<h3>$error</h3>";
}
?>
<form id="maiForm" method="post" action="">
<p>
<label for="name">Name</label><br>
<input type="text" id="name" name="name">
</p>
<p>
<label for="email">Email Address</label><br>
<input type="text" id="email" name="email">
</p>
<p>
<label for="phone">Phone No</label><br>
<input type="text" id="phone" name="phone">
</p>
<p>
<label for="zip">Zip Code</label><br>
<input type="text" id="zip" name="zip">
</p>
<p>
<label>Project Type<br>
<input type="checkbox" name="projectType" class="projectType" value="None">None
</label>
<label>
<input type="checkbox" name="projectType" class="projectType" value="New Home">New Home
</label>
<label>
<input type="checkbox" name="projectType" class="projectType" value="Renovation">Renovation
</label>
</p>
<p>
Budget<br>
<select name="budget">
<option value="">Please Select</option>
<option value="None">None</option>
<option value="300k">300k</option>
<option value="500k">500k</option>
<option value="700k">700k</option>
<option value="900k">900k</option>
<option value="More">More</option>
</select>
</p>
<input type="submit" name="submit" id="submit" value="submit">
</form>
</body>
</html>