Untitled

<?php
if ($_POST){
	$errors = array();

// start validation
	if(empty($_POST["user_name"])){
		$errors["user_name"] = "your name cannot be empty";
	}

	if(empty($_POST["user_email"])){
		$errors["user_email"] = "your email cannot be empty";
	}

	if(empty($_POST["user_tel"])){
		$errors["user_tel"] = "your phone number cannot be empty";
	}

//check errors
	if (count($errors)== 0){

echo "Success, well done!";
exit();
	}
}
?>

<!DOCTYPE html>
<html lang="en">
<head>
	<meta sharset="UTF-8">
<title></title>
</head>
<body>
	<form action="" method="post">
		<div>
			<label for="subjects">Subject:</label>
			<select class="selecteur" id="inlineFormCustomSelect">
    				<option selected>Choose...</option>
    				<option value="Hobbit">Hobbit</option>
    				<option value="Nain">Nain</option>
    				<option value="Elfe">Elfe</option>
  			</select>
		</div>

		<div>
			<label for="user_name">Name :</label>
			<input type="text" id="name" name="user_name" value="<?php if (isset($_POST['user_name'])){echo $_POST['user_name'];} ?>">
			<p><?php if(isset($errors["user_name"])) echo $errors["user_name"]; ?></p>

		</div>

		<div>
			<label for="user_email">Email :</label>
			<input type="email" id="email" name="user_email" value="<?php if (isset($_POST['user_email'])){ echo $_POST['user_email'];} ?>">
			<p><?php if(isset($errors["user_email"])) echo $errors["user_email"]; ?></p>
		</div>

		<div>
			<label for="user_tel">Phone number :</label>
			<input type="tel" id="tel" name="user_tel" pattern="[0-9]{2}.[0-9]{2}.[0-9]{2}.[0-9]{2}.[0-9]{2}" value="<?php if (isset($_POST['user_tel'])){ echo $_POST['user_tel'];} ?>">
			<p><?php if(isset($errors["user_tel"])) echo $errors["user_tel"]; ?></p>
		</div>

		<div>
		 	<label for="user_message">Message :</label>
			<textarea id="message" name="user_message"></textarea>
		</div>

		<div class="button">
			<button type="submit">Send your message</button>
		</div>
	</form>

</body>
</html>