curl question

hi. i've been experimenting with curl and it has been working great. i was wondering though if anybody knows why an extra "0" value is being tacked on to the end of the post. here is the example: <? $test="i hope this worked"; $ch=curl_init(); curl_setopt($ch, CURLOPT_URL, "http://www.mydomain.com/testing.php"); curl_setopt($ch, CURLOPT_POST, 1); curl_setopt($ch, CURLOPT_POSTFIELDS, "v1=$test&v2=20&v3=30"); curl_exec($ch); curl_close($ch); ?> and then the testing.php is: <? echo "$v1 $v2 $v3"; ?> the output, however is: i hope this worked 20 30 0 how do i get rid of the extra 0? i'm not sure i need to for my purposes, but i am curious. thanks.