POST with cURL

These two scripts demonstrate a way of using POST to transmit data
from one script to another. I do not see anything in the on-line
cURL documentation to indicate that this would cause any problems.

Have I overlooked anything?

<?php # script1.php
$urlstring = 'p1=data&p2=to&p3=script2';
$ch = curl_init("http://www.example.com/script2.php");
curl_setopt( $ch, CURLOPT_POST, 1 );
curl_setopt( $ch, CURLOPT_POSTFIELDS, $urlstring );
curl_setopt( $ch, CURLOPT_RETURNTRANSFER, 0 );
$script2_response = curl_exec( $ch );
curl_close( $ch );
exit;
// This line is not executed.
echo $script2_response;
?>


<?php # script2.php
echo '<pre>script2.php - ';
print_r( $_POST );
echo '</pre>';
?>

TIA
Bob