The HTML form had dubious quotation marks around the type='text' and I modified the php to add some rudimentary checking of variables and also sanitisation ~ hope it will help.
<form action="" method="post">
<div class="col-md-6">
<input name="name" type="text" class="form-control" placeholder="Name">
</div>
<div class="col-md-6"><!-- // incorrect quotation used on `text` //-->
<input name="email" type='text' class="form-control" placeholder="Email">
</div>
<div class="col-md-12">
<input name="subject" type="text" class="form-control" placeholder="Subject">
</div>
<div class="col-md-12">
<textarea name="message" class="form-control" placeholder="Message" rows="4"></textarea>
</div>
<div class="col-md-8">
<input type="submit" class="form-control text-uppercase" name="send" value="submit" />
</div>
</form>
<?php
if( $_SERVER['REQUEST_METHOD']=='POST' && isset( $_POST['subject'],$_POST['email'],$_POST['name'],$_POST['message'] ) ){
$to = 'info@autonomousdata.com';
$name = filter_input( INPUT_POST, 'name', FILTER_SANITIZE_STRING );
$subject = filter_input( INPUT_POST, 'subject', FILTER_SANITIZE_STRING );
$message = filter_input( INPUT_POST, 'message', FILTER_SANITIZE_STRING );
$email = filter_var( filter_input( INPUT_POST, 'email', FILTER_SANITIZE_STRING ), FILTER_VALIDATE_EMAIL );
$headers=array();
$headers[]="From: {$email}";
$headers[]="Reply-To: {$email}";
$headers[]="Content-type: text/html; charset=iso-8859-1";
$headers[]="X-Mailer: PHP/" . phpversion();
/* generate final headers string */
$headers=implode( "\r\n", $headers );
$message=array();
$message[]="Name: {$name}";
$message[]="Email: {$email}";
$message[]="Comment: {$message}";
/* generate final message string */
$message=implode( "\n", $message );
$result=@mail( $to, $subject, $message, $headers );
switch( $result ){
case true:
$msg='Thank you for contacting us! All information received will always remain confidential. We will contact you as soon as we review your message.';
break;
case false:
$msg='failed to send the mail';
break;
}
echo "<script type='text/javascript'>alert('{$msg}');</script>";
}
?>
The test page, in it's entirety, that I set up to test the basic functionality of the script. As this was all run locally I cannot confirm whether the email would be sent - it looks correct however.
<?php
?>
<!doctype html>
<html>
<head>
<title>Basic Contact Form - investigating email send failure.</title>
<script type='text/javascript' charset='utf-8'></script>
<style type='text/css' charset='utf-8'>
form{
width:50%;
}
form,output,input[type='text'],textarea,input[type='button'],input[type='submit']{
display:block;
box-sizing:border-box;
padding:0.5rem;
margin:0.5rem;
}
output{
color:red;
}
input[type='text'],textarea{
width:60%;
}
</style>
</head>
<body>
<form action="" method="post">
<div class="col-md-6">
<input name="name" type="text" class="form-control" placeholder="Name">
</div>
<div class="col-md-6"><!-- // incorrect quotation used on `text` //-->
<input name="email" type='text' class="form-control" placeholder="Email">
</div>
<div class="col-md-12">
<input name="subject" type="text" class="form-control" placeholder="Subject">
</div>
<div class="col-md-12">
<textarea name="message" class="form-control" placeholder="Message" rows="4"></textarea>
</div>
<div class="col-md-8">
<input type="submit" class="form-control text-uppercase" name="send" value="submit" />
</div>
<output id='msgs'></output>
</form>
<?php
if( $_SERVER['REQUEST_METHOD']=='POST' && isset( $_POST['subject'],$_POST['email'],$_POST['name'],$_POST['message'] ) ){
$to = 'info@autonomousdata.com';
$name = filter_input( INPUT_POST, 'name', FILTER_SANITIZE_STRING );
$subject = filter_input( INPUT_POST, 'subject', FILTER_SANITIZE_STRING );
$message = filter_input( INPUT_POST, 'message', FILTER_SANITIZE_STRING );
$email = filter_var( filter_input( INPUT_POST, 'email', FILTER_SANITIZE_STRING ), FILTER_VALIDATE_EMAIL );
if( !$to or !$name or !$subject or !$message or !$email ){
echo "Error: one or more required variables are not available.";
} else {
$headers=array();
$headers[]="From: {$email}";
$headers[]="Reply-To: {$email}";
$headers[]="Content-type: text/html; charset=iso-8859-1";
$headers[]="X-Mailer: PHP/" . phpversion();
/* generate final headers string */
$headers=implode( "\r\n", $headers );
$message=array();
$message[]="Name: {$name}";
$message[]="Email: {$email}";
$message[]="Comment: {$message}";
/* generate final message string */
$message=implode( "\n", $message );
$result=@mail( $to, $subject, $message, $headers );
switch( $result ){
case true:
$msg='Thank you for contacting us! All information received will always remain confidential. We will contact you as soon as we review your message.';
break;
case false:
$msg='Failed to send the mail';
break;
}
/* Let the user know the status of the form submission somehow */
echo "
<script type='text/javascript'>
document.getElementById('msgs').innerHTML='{$msg}';
/*
alert('{$msg}');
*/
</script>";
}
}
?>
</body>
</html>
