我的联系表单不起作用，没有显示任何错误，但没有发送电子邮件。

Question

我的联系表单无效，我无法发送邮件，也没有显示任何错误。

这是我的php文件：     

error_reporting(-1);
ini_set('display_errors', 'On');
set_error_handler("var_dump");

if(empty($_POST['name'])      ||
empty($_POST['email'])     ||
empty($_POST['phone'])     ||
empty($_POST['message'])   ||
!filter_var($_POST['email'],FILTER_VALIDATE_EMAIL))
{
echo "No arguments Provided!";
return false;
}

$name = strip_tags(htmlspecialchars($_POST['name']));
$email_address = strip_tags(htmlspecialchars($_POST['email']));
$phone = strip_tags(htmlspecialchars($_POST['phone']));
$message = strip_tags(htmlspecialchars($_POST['message']));

$to = 'email@gmail.com'; 
$email_subject = "Website Contact Form:  $name";
$email_body = "You have received a new message from your website 
contact form.\n\n"."Here are the details:\n\nName: $name\n\nEmail: 
$email_address\n\nPhone: $phone\n\nMessage:\n$message";
$headers = "From: noreply@mydomain.com\n"; 
$headers .= "Reply-To: $email_address";
mail($to,$email_subject,$email_body,$headers);
return true;
?>'