Contact form

[cluelessPHP]

Seems a little basic but it works, thoughts? I'm not sure about sending multiple mail at once, I'm sure there is a better way to do it
Validation class

class Validation 
{
	private static 
	$contact,
	$email,
	$subject,
	$message;
	
const MIN_NAME = 2,
MIN_SUBJECT = 1,
MIN_MESSAGE = 20;

public static function testName($contact){
	//test contact me name
	return(strlen($contact) >= self::MIN_NAME);
}

public static function testEmail($email){
	//test email address
	return (filter_var($email, FILTER_VALIDATE_EMAIL) != self::$email);
}	

public static function testSubject($subject){
	//test contact me subject
	return(str_word_count($subject) >= self::MIN_SUBJECT);
}

public static function testMessage($message){
	//test contact me subject
	return(str_word_count($message) >= self::MIN_MESSAGE);
}
}

Sending mail

<?php 
require ("classes/Validation.php");
if ($_SERVER['REQUEST_METHOD'] == 'POST')
	{
	$post = filter_input_array(INPUT_POST, FILTER_SANITIZE_STRING);		
	$contact = $email = $subject = $message = "";
	$contact = $post['contact'];
	$email = $post['email'];
	$subject = $post['subject'];
	$message = $post['message'];
	$errors = array();
 
 $fields = array( 
  'contact' => array( 
    'validator' => 'testName', 
    'message'   => 'Your name should be a minimum of two characters and alphanumeric' 
  ),
  'email' => array( 
    'validator' => 'testEmail', 
    'message'   => 'Please enter a valid email address' 
  ),
   'subject' => array( 
    'validator' => 'testSubject', 
    'message'   => 'Please enter at least one word for your title' 
  ),
   'message' => array( 
    'validator' => 'testMessage', 
    'message'   => 'Please enter a minimum of twenty words' 
  )
);  

foreach($post as $key => $value) 
	{
  if(isset($fields[$key])) 
	{
			if(!Validation::{$fields[$key]['validator']}($value)) 
			{
				$errors[] = ['name' => $key, 'error' => $fields[$key]['message']];
			}
	}
}
if(empty($errors)) 
	{
		try
		{
			//To user
			$success = ["message" => "Your message was sent"];	
			$to = $post['email'];
			$message = 'Thank you for getting in touch, I will be in contact soon!';
			$message = wordwrap($message, 70, "\r\n");
			$headers = 'From: [e-mail]' . "\r\n" .
			'Reply-To: [e-mail]' . "\r\n" . 'X-Mailer: PHP/' . phpversion();
			$mailResult = mail($to, 'Email confirmation from cluelessPHP', $message, $headers);
			
		//to me
		$name = $contact = $post['contact'];
		$from = $post['email'];
		$topic = $subject = $post['subject'];
		$send = '[e-mail]';
		$messages = wordwrap($message . "\n Sent by " . $name . "\n Reply to \n" . $email, 70, "\r\n");
		$headers = 'From: [e-mail]' . "\r\n" .
		'Reply-To: [e-mail]' . "\r\n" . 'X-Mailer: PHP/' . phpversion();
		$mailResult = mail($send, ". " . $topic, $messages, $headers);
	}
	catch(Exception $e)
	{
		$errors[] = ["name" => "email", "error" => "Your message was not sent"];
	} 
}	  

header('Content-Type: application/json');

if (empty($errors))
{
	echo json_encode($success);
}
else
{
	echo json_encode(["errors" => $errors]);
}			
}