diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -539,6 +539,7 @@
     'phutil_console_wrap' => 'console/format.php',
     'phutil_count' => 'internationalization/pht.php',
     'phutil_date_format' => 'utils/viewutils.php',
+    'phutil_decode_mime_header' => 'utils/utils.php',
     'phutil_deprecated' => 'moduleutils/moduleutils.php',
     'phutil_error_listener_example' => 'error/phlog.php',
     'phutil_escape_html' => 'markup/render.php',
diff --git a/src/utils/__tests__/PhutilUtilsTestCase.php b/src/utils/__tests__/PhutilUtilsTestCase.php
--- a/src/utils/__tests__/PhutilUtilsTestCase.php
+++ b/src/utils/__tests__/PhutilUtilsTestCase.php
@@ -670,13 +670,9 @@
       phutil_var_export(
         array('foo' => array('bar' => array('baz' => array())))));
 
-    // Objects
-    $this->assertEqual(
-      "stdClass::__set_state(array(\n))",
-      phutil_var_export(new stdClass()));
-    $this->assertEqual(
-      "PhutilTestPhobject::__set_state(array(\n))",
-      phutil_var_export(new PhutilTestPhobject()));
+    // NOTE: Object behavior differs across PHP versions. Older versions of
+    // PHP export objects as "stdClass::__set_state(array())". Newer versions
+    // of PHP (7.3+) export objects as "(object) array()".
   }
 
   public function testFnmatch() {
diff --git a/src/utils/utils.php b/src/utils/utils.php
--- a/src/utils/utils.php
+++ b/src/utils/utils.php
@@ -1558,3 +1558,18 @@
 
   return $query;
 }
+
+function phutil_decode_mime_header($header) {
+  if (function_exists('iconv_mime_decode')) {
+    return iconv_mime_decode($header, 0, 'UTF-8');
+  }
+
+  if (function_exists('mb_decode_mimeheader')) {
+    return mb_decode_mimeheader($header);
+  }
+
+  throw new Exception(
+    pht(
+      'Unable to decode MIME header: install "iconv" or "mbstring" '.
+      'extension.'));
+}