<form action="post.php" method="post">
<input type="text" name="secenek[]">
<input type="text" name="secenek[]">
<input type="text" name="secenek[]">
<input type="submit" value="Gönder">
</form>

<?php
$a = $_POST['secenek'];
foreach($a as $b) {
	echo $b;
}
?>