Any idea why my mail function doesn't work? [duplicate] - php

Question

This question already has answers here:
PHP mail function doesn't complete sending of e-mail
(31 answers)
Closed 7 years ago.
HTML Code:
<form method="post" action="form.php">
<div class="col-sm-6 form-group">
<input class="form-control" id="name" name="name" type="text" placeholder="Name">
</div>
<div class="col-sm-6 form-group">
<input class="form-control" id="email" name="email" type="email" placeholder="Email">
</div>
<div class="col-xs-12">
<textarea class="form-control" id="message" name="message" type="message" rows="5" placeholder="Message"></textarea>
</div>
<button type="button" id="submit">Submit</button>
<?php echo $result; ?>
</form>
PHP Code:
<?php
if (isset($_POST["submit"])) {
$name = $_POST['name'];
$email = $_POST['email'];
$message = $_POST['message'];
$from = 'Demo Form';
$to = 'example#gmail.com';
$body = "From: $name\n E-Mail: $email\n Message:\n $message";
if (!$_POST['name']) {
$errName = 'Please enter your name';
}
if (!$_POST['email'] || !filter_var($_POST['email'], FILTER_VALIDATE_EMAIL)) {
$errEmail = 'Please enter a valid email address';
}
if (!$_POST['message']) {
$errMessage = 'Please enter your message';
}
if (!$errName && !$errEmail && !$errMessage) {
if (mail ($to, $subject, $body, $from)) {
$result='<div class="alert alert-success">Thank You</div>';
} else {
$result='<div class="alert alert-danger">Please try again later</div>';
}
}
}
?>
So this is the code and I don't know why I still don't get mail when the form is submitted. I tried everything I know but is it still the same. Moreover, I am using a web hosting that supports send emails and PHP and more. And it still doesn't work.

Answer 1

There are multiple logical and syntactical issues there.
You need to validate $_POST before you assign it to any variable.
You are using $subject but you do not have any value in that variable.
You are mixing header values to the mail body
I tried to fix issues try this.
<?php
if (isset($_POST["submit"])) {
if (!$_POST['name']) {
$errName = 'Please enter your name';
}
if (!$_POST['email'] || !filter_var($_POST['email'], FILTER_VALIDATE_EMAIL)) {
$errEmail = 'Please enter a valid email address';
}
if (!$_POST['message']) {
$errMessage = 'Please enter your message';
}
$name = $_POST['name'];
$email = $_POST['email'];
$message = $_POST['message'];
$from = 'Demo Form';
$to = 'example#gmail.com';
$body = $message;
$subject="Demo message";
$headers = 'MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";
$headers .= 'From: Birthday Reminder <birthday#example.com>' . "\r\n".'X-Mailer: PHP/' . phpversion();
if (!$errName && !$errEmail && !$errMessage) {
if (mail ($to, $subject, $body, $headers)) {
$result='<div class="alert alert-success">Thank You</div>';
} else {
$result='<div class="alert alert-danger">Please try again later</div>';
}
}
}
?>
For further details of refer this http://php.net/manual/en/function.mail.php