HTML Code:
<form name="form1" method="post" action="file.php">
<input type="text" name="textfield">
<input type="submit" name="edit" id="edit" value="edit">
<input type="submit" name="upload" id="upload" value="upload">
</form>
file.php
PHP Code:
<?php
if ($_POST['edit']){
include('edit.php');
} elseif ($_POST['upload']){
include('upload.php');
}