diff --git a/filesystem/is_dir.markdown b/filesystem/is_dir.markdown
index 215a832..1f5eeb6 100644
--- a/filesystem/is_dir.markdown
+++ b/filesystem/is_dir.markdown
@@ -9,7 +9,7 @@
 
 {{code:ruby
     is_dir = File.directory?('/path/to/foobar')
-    var_export(is_dir)
+    p is_dir
 
     #=> true
 }}
diff --git a/filesystem/sys_get_temp_dir.markdown b/filesystem/sys_get_temp_dir.markdown
new file mode 100644
index 0000000..d2cdb3a
--- /dev/null
+++ b/filesystem/sys_get_temp_dir.markdown
@@ -0,0 +1,24 @@
+# sys_get_temp_dir
+
+Returns directory path used for temporary files.
+
+{{code:php
+  $tmp = sys_get_temp_dir();
+  var_export($tmp);
+
+  //=> '/tmp'
+}}
+
+{{code:ruby
+  require 'tmpdir'
+  tmp = Dir.tmpdir
+  p tmp
+
+  #=> "/tmp"
+}}
+
+{{related:
+    filesystem/basename
+    filesystem/dirname
+    filesystem/pathinfo
+}}