Update documentation

1 files changed, 15 insertions, 2 deletions

diff --git a/ext/spl/examples/directorytree.php b/ext/spl/examples/directorytree.php
index e22244a9e1..31af2495a7 100755
--- a/ext/spl/examples/directorytree.php
+++ b/ext/spl/examples/directorytree.php
@@ -2,13 +2,26 @@
 
 /** tree view example
  *
- * Usage: php DirectoryTree.php <path>
+ * Usage: php directorytree.php <path> [<start> [<count>]]
  *
  * Simply specify the path to tree with parameter <path>.
  *
- * (c) Marcus Boerger
+ * (c) Marcus Boerger, 2003
  */
 
+if ($argc < 2) {
+	echo <<<EOF
+Usage: php ${_SERVER['PHP_SELF']} <path>
+
+Displays a graphical directory tree for the given <path>.
+
+<path> The directory for which to generate the directory tree graph.
+
+
+EOF;
+	exit(1);
+}
+
 $length = $argc > 3 ? $argv[3] : NULL;
 
 foreach(new LimitIterator(new DirectoryTreeIterator($argv[1]), @$argv[2], $length) as $file) {