<?php

if($_POST["formSubmit"]){

$isim = $_POST["isim"];

echo $isim;

}

?>

?>

<form action="<?php echo $_SERVER['PHP_SELF'] ?>" method="POST">

<input type="text" name="isim" /> <br />
<input type="submit" name="formSubmit" value="KAYDET" />
 
</form>