Compute TVA NUMBER FROM SIREN NUMBER

TVA CALCULCATION

<?php

function getTvaKey($siren)
{
	return (12+3*(intval($siren) % 97))%97;

}
function getTvaCode($siren)
{
	return "FR".getTvaKey($siren).$siren;
}

$siren=$argv[1];
echo "Cacul Numero TVA:\n";
echo "-----------------\n";
echo "SIREN   : ".$siren."\n";
echo "CLE TVA : ".getTvaKey($siren)."\n";
echo "CODE TVA: ".getTvaCode($siren)."\n";
?>