Untitled

<!doctype html>
<html>

<head>
	<meta charset="utf-8">
</head>
<body>

	<form method="POST">

		<input type="tekst" name="imie"></input>
		<button type="submit" >Sprawdz</button>

	</form>

	<?php

	$a =  $_POST['imie'];

	switch($a){
		case "michal": echo("Witaj ".$a); break;
		default: echo("nie znam cie"); break;

	}

	?>

</body>
</html>