PHP form submit success message inserts unwanted number after message - php

Question

Created a php form with a success message that appears just below the Submit button upon successful mission. After adding some additional code in the php to create an email confirmation, I'm now noticing that a number "1" has been inserted in the line after my success message - see below:
Any ideas on how to make that number 1 go away? Code below:
<?php
$name = $_POST['name'];
$email = $_POST['email'];
$phone = $_POST['phone'];
$company = $_POST['company'];
$message = $_POST['message'];
$human = $_POST['human'];
$from = 'From: Page Name';
$to = 'email#mysite.com';
$subject = 'Service Inquiry';
$body = "From: $name\n E-Mail: $email\n Phone: $phone\n Company: $company\n
Message:\n $message";
// Confirmation email.
$conf_subject = 'Your recent inquiry';
$conf_sender = 'MY SITE <no-reply#mysite.com>';
$msg = $_POST['name'] . ",\n\nThank you for your recent inquiry. A member of
our team will respond to your message as soon as possible.\n\nThanks,\n\nMy
Company Team";
if ($_POST['submit']) {
if ($name != '' && $email != '' && $phone != '' && $message != '') {
if ($human == '4') {
if (mail ($to, $subject, $body, $from)) {
echo '<p>Thanks for your inquiry, we will get back to you as soon
as we can!</p>';
echo (mail ($email, $conf_subject, $msg, 'From: ' . $conf_sender
));
} else {
echo '<p>Something went wrong, go back and try again!</p>';
}
} else if ($_POST['submit'] && $human != '4') {
echo '<p>You answered the anti-spam question incorrectly!</p>';
}
} else {
echo '<p>You need to fill in all required fields!</p>';
}
}
?>
Thanks everyone!

Answer 1

This line:
echo (mail ($email, $conf_subject, $msg, 'From: ' . $conf_sender));
You are echoing out the result of your call to the mail function. Since the mail was successfully handed over to the server it returns true. When you echo out a boolean true it gets converted to an integer which is 1. That's why you see that in your code.
Remove the echo to remove the 1 from being displayed in your output.

Answer 2

echo (mail ($email, $conf_subject, $msg, 'From: ' . $conf_sender ));
This code is causing the echo, its echoing 1 as the mail() function is returning true. I'm not sure why you're echoing the mail function here any way, just remove the echo and all is good.

Answer 3

That is because of this code:
echo (mail ($email, $conf_subject, $msg, 'From: ' . $conf_sender ));
You "echo" the result of the mail function. "1" is equal to "true" on mail sending success.