Use php_sapi_name() to check for CLI interface

diff --git a/tweeper.php b/tweeper.php
index 7fc98cb..68b265e 100755 (executable)
--- a/tweeper.php
+++ b/tweeper.php
@@ -78,7 +78,7 @@ if (isset($_GET['screen_name'])) {
 } else if (isset($argv[1])) {
   $screen_name = $argv[1];
 } else {
-  if (isset($_SERVER['SCRIPT_NAME']))
+  if (php_sapi_name() != 'cli')
     $usage = htmlentities("{$_SERVER['SCRIPT_NAME']}?screen_name=<screen_name>");
   else
     $usage = "{$argv[0]} <screen_name>\n";