This function removes recipient phone number from existing list with all additional field values.
listSubscribeSMS(string $id, string $phone, array $merge_vars, boolean $update_existing) : boolean
Array of merge fields. Each merge field is represented as an array that includes:
listUnsubscribeSMS($id, $phone, $delete_member, $send_notify); header("Content-Type: text/plain"); if ($api->errorCode) { echo "Unable to load listUnsubscribeSMS()!\n"; echo "\tCode=" . $api->errorCode . "\n"; echo "\tMsg=" . $api->errorMessage . "\n"; } else { echo "Returned: " . $retval . "\n"; }