PHP Email form bold for headings on email message items - php

Question

I have a php form that sends an email, however I would like to put the headings of each section in bold but can't seem to get it to work from everywhere I've searched.
The form:
$email_message .= "Name: ".clean_string($firstlastname)."\n\n";
$email_message .= "Email: ".clean_string($email_from)."\n\n";
$email_message .= "Telephone: ".clean_string($telephone)."\n\n";
$email_message .= "Property Type: ".clean_string($ptype)."\n\n";
$email_message .= "From Address: ".clean_string($faddress)."\n\n";
$email_message .= "To Address: ".clean_string($taddress)."\n";
$email_message .= "Moving Items Description: ".clean_string($itemsdescription)."\n\n";
$email_message .= "Dissasembling Requirements: ".clean_string($disassemble)."\n\n";
$email_message .= "Packaging Requirements: ".clean_string($packaging)."\n\n";
$email_message .= "Preferred Date and Time: ".clean_string($dateandtime)."\n\n";
$email_message .= "Property Access: ".clean_string($paccess)."\n\n";
$email_message .= "Stair Count: ".clean_string($staircount)."\n\n";
$email_message .= "Message: ".clean_string($message)."\n\n";
// create email headers
$headers .= "Content-Type: text/html; charset=ISO-8859-1\r\n";
$headers = 'From: '.$email_from."\r\n".
'Reply-To: '.$email_from."\r\n" .
'X-Mailer: PHP/' . phpversion();
#mail($email_to, $email_subject, $email_message, $headers);
?>
I've tried adding the bold and strong tags to the headings;
$email_message .= "<b>Name:</b> ".clean_string($firstlastname)."\n\n";
Still not working, including setting it outside of the heading of the text.
Edit: this is the full form
<?php
if(isset($_POST['email'])) {
// EDIT THE 2 LINES BELOW AS REQUIRED
$email_to = "email#email.com";
$email_subject = "Contact Form Submission";
function died($error) {
// your error code can go here
echo "We are very sorry, but there were error(s) found with the form you submitted. ";
echo "These errors appear below.<br /><br />";
echo $error."<br /><br />";
echo "Please go back and fix these errors.<br /><br />";
die();
}
// validation expected data exists
if(!isset($_POST['firstlastname']) ||
!isset($_POST['email']) ||
!isset($_POST['telephone']) ||
!isset($_POST['ptype']) ||
!isset($_POST['faddress']) ||
!isset($_POST['taddress']) ||
!isset($_POST['itemsdescription']) ||
!isset($_POST['disassemble']) ||
!isset($_POST['packaging']) ||
!isset($_POST['dateandtime']) ||
!isset($_POST['paccess']) ||
!isset($_POST['staircount']) ||
!isset($_POST['message'])) {
died('We are sorry, but there appears to be a problem with the form you submitted.');
}
$firstlastname = $_POST['firstlastname'];
$email_from = $_POST['email'];
$telephone = $_POST['telephone'];
$ptype = $_POST['ptype'];
$faddress = $_POST['faddress'];
$taddress = $_POST['taddress'];
$itemsdescription = $_POST['itemsdescription'];
$disassemble = $_POST['disassemble'];
$packaging = $_POST['packaging'];
$dateandtime = $_POST['dateandtime'];
$paccess = $_POST['paccess'];
$staircount = $_POST['staircount'];
$message = $_POST['message'];
$error_message = "";
$email_exp = '/^[A-Za-z0-9._%-]+#[A-Za-z0-9.-]+\.[A-Za-z]{2,4}$/';
if(!preg_match($email_exp,$email_from)) {
$error_message .= 'The Email Address you entered does not appear to be valid.<br />';
}
$string_exp = "/^[A-Za-z .'-]+$/";
if(!preg_match($string_exp,$firstlastname)) {
$error_message .= 'The First Name you entered does not appear to be valid.<br />';
}
if(strlen($message) < 2) {
$error_message .= 'The Comments you entered do not appear to be valid.<br />';
}
if(strlen($error_message) > 0) {
died($error_message);
}
$email_message = "Form details below.\n\n";
function clean_string($string) {
$bad = array("content-type","bcc:","to:","cc:","href");
return str_replace($bad,"",$string);
}
$email_message .= "Name: ".clean_string($firstlastname)."\n\n";
$email_message .= "Email: ".clean_string($email_from)."\n\n";
$email_message .= "Telephone: ".clean_string($telephone)."\n\n";
$email_message .= "Property Type: ".clean_string($ptype)."\n\n";
$email_message .= "From Address: ".clean_string($faddress)."\n\n";
$email_message .= "To Address: ".clean_string($taddress)."\n";
$email_message .= "Moving Items Description: ".clean_string($itemsdescription)."\n\n";
$email_message .= "Dissasembling Requirements: ".clean_string($disassemble)."\n\n";
$email_message .= "Packaging Requirements: ".clean_string($packaging)."\n\n";
$email_message .= "Preferred Date and Time: ".clean_string($dateandtime)."\n\n";
$email_message .= "Property Access: ".clean_string($paccess)."\n\n";
$email_message .= "Stair Count: ".clean_string($staircount)."\n\n";
$email_message .= "Message: ".clean_string($message)."\n\n";
// create email headers
$headers = "Content-Type: text/html; charset=ISO-8859-1\r\n";
$headers = 'From: '.$email_from."\r\n".
'Reply-To: '.$email_from."\r\n" .
'X-Mailer: PHP/' . phpversion();
#mail($email_to, $email_subject, $email_message, $headers);
?>
<!-- include your own success html here -->
<script>window.location.replace("index.html");</script>
<?php
}
?>

Answer 1

You missed a dot to append more headers. This overwrites your Content-Type and that is why it is parsing the email as text and not has HTML
$headers .= "Content-Type: text/html; charset=ISO-8859-1\r\n";
$headers .= 'From: '.$email_from."\r\n".
'Reply-To: '.$email_from."\r\n" .
'X-Mailer: PHP/' . phpversion();
#mail($email_to, $email_subject, $email_message, $headers);
?>

Answer 2

Could you try :
$email_message .= "<strong>Name:</strong> ".clean_string($firstlastname)."\n\n";
or
$email_message .= "<b>Name:</b> ".clean_string($firstlastname)."\n\n";
or
$email_message .= "<p style="font-weight: bold;">Name:</b> ".clean_string($firstlastname)."\n\n";

Answer 3

Use PHP Mailer plugin.
Download Plugin in following link:
https://github.com/PHPMailer/PHPMailer/releases/tag/v5.2.26
$mail_message='Dear '.$row[0]['branch_name'].','. "\r\n";
$mail_message.='Thanks for contacting regarding to forgot password,<br> Your <b>Password</b> is <b>'.$passwordplain.'</b>'."\r\n";
$mail_message.='<br>Please Update your password.';
$mail_message.='<br>Thanks & Regards';
$mail_message.='<br>Test group of company';
date_default_timezone_set('Etc/UTC');
require FCPATH.'application/libraries/PHPMailer/PHPMailerAutoload.php';
$mail = new PHPMailer;
// $mail->isSMTP();
$mail->SMTPSecure = "ssl";
$mail->Debugoutput = 'html';
$mail->Host = "(HOST SERVER)";
$mail->Port = 465;
$mail->SMTPAuth = true;
$mail->Username = "(USERNAME)";
$mail->Password = "(PASSWORD)";
$mail->setFrom('(FROM MAIL ADDRESS)', 'Test group of company');
$mail->IsHTML(true);
$mail->addAddress($email);
$mail->Subject = 'New password for login';
$mail->Body = $mail_message;
if (!$mail->send()) {
$data['message_display'] = 'Failed to send password, please try again!';
$this->load->view('branch/forgotPassword', $data);
} else {
$data['message_display'] = 'Password sent to your email!';
$this->load->view('branch/forgotPassword', $data);
}