php contact form sending mail to server admin [duplicate] - php

Question

This question already has answers here:
PHP mail function doesn't complete sending of e-mail
(31 answers)
Closed 3 years ago.
I have little issue about my contact form. it doesn't send mail the server admin.
<?php
session_start();
// get the data from the form
$admin_email = 'server#admin.com';
$email = isset($_POST['email']) ? $_POST['email'] : '';
$subject = 'Contact Form';
$name = isset($_POST['name']) ? $_POST['name'] : '';
$message = isset($_POST['message']) ? $_POST['message'] : '';
$captcha = isset($_POST['captcha']) ? $_POST['captcha'] : '';
$img_session = isset($_SESSION['img_session']) ? $_SESSION['img_session'] : '';
$website = $_SERVER['www.mywebsite.com'];
// check if the fields are empty
if(empty($email) or empty($name) or empty($email) or empty($message)){
$output = "All fields are required!";
}else{
if(md5($captcha) == $img_session){
$header = "From: $email"."\r\n"
.'Content-Type: text/plain; charset=utf-8'."\r\n";
$message = "
New entry from $subject!
Name: $name
E-Mail: $email
Message:
$message
This message was sent from http://$website";
if(mail($admin_email, '=?utf-8?B?'.base64_encode($subject).'?=', $message, $header)){
$output = "Your message was sent!<br />Thank you!";
}
}else{
$output = "Wrong captcha code!";
}
}
echo $output;
?>
UPDATED
the wrong part is if $admin_email is not match the contact form email address wrong captcha error pops up? I don't know why. I mean if I don't write contact form email line, same address with admin_email I can't send mail??? What I am trying to do here: send mail to the guest (your mail sent), and also $admin_email: server#admin.com (You have email) $messege.
Form
<form action="" id="contact_form" method="POST">
<p>Name:</p>
<input type="text" name="name" placeholder="Enter name" required=""/>
<p>Email:</p>
<input type="email" name="email" placeholder="Enter email" required=""/>
<p>Message:</p>
<textarea name="message" rows="10" cols="30" required=""></textarea>
<p>Captcha:</p>
<img src="captcha.php" id="captcha"/>
<input type="text" name="captcha" placeholder="Enter code" required=""/>
<input type="submit" value="Submit" />
</form>

Answer 1

If you want to send both email to user and admin, try to call the mail function twice, for example
if(mail($user_email_address, '=?utf-8?B?'.base64_encode($subject).'?=', $message, $header)){
$output = "Your message was sent!<br />Thank you!";
}
if(mail($admin_email_address, '=?utf-8?B?'.base64_encode($subject).'?=', $message, $header)){
$output = "You've got a new message from #user_email_address <br /> ";
}