Código PHP:
<?php
$ThisFileName = "Ingresar.php";
$OtherFileName = "Principal.php";
$GInsert = $_POST['GInsert'];
$GUpdate = $_POST['GUpdate'];
$GDelete = $_POST['GDelete'];
$GSelect = $_POST['GSelect'];
$tfIdnt = $_POST['tfIdnt'];
$tfKey = $_POST['tfKey'];
?>