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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
@@ -411,6 +411,7 @@
'hsprintf' => 'markup/render.php',
'id' => 'utils/utils.php',
'idx' => 'utils/utils.php',
+ 'idxv' => 'utils/utils.php',
'ifilter' => 'utils/utils.php',
'igroup' => 'utils/utils.php',
'ipull' => 'utils/utils.php',
diff --git a/src/utils/utils.php b/src/utils/utils.php
--- a/src/utils/utils.php
+++ b/src/utils/utils.php
@@ -49,6 +49,39 @@
/**
+ * Access a sequence of array indexes, retrieving a deeply nested value if
+ * it exists or a default if it does not.
+ *
+ * For example, `idxv($dict, array('a', 'b', 'c'))` accesses the key at
+ * `$dict['a']['b']['c']`, if it exists. If it does not, or any intermediate
+ * value is not itself an array, it returns the defualt value.
+ *
+ * @param array Array to access.
+ * @param list<string> List of keys to access, in sequence.
+ * @param wild Default value to return.
+ * @return wild Accessed value, or default if the value is not accessible.
+ */
+function idxv(array $map, array $path, $default = null) {
+ if (!$path) {
+ return $default;
+ }
+
+ $last = last($path);
+ $path = array_slice($path, 0, -1);
+
+ $cursor = $map;
+ foreach ($path as $key) {
+ $cursor = idx($cursor, $key);
+ if (!is_array($cursor)) {
+ return $default;
+ }
+ }
+
+ return idx($cursor, $last, $default);
+}
+
+
+/**
* Call a method on a list of objects. Short for "method pull", this function
* works just like @{function:ipull}, except that it operates on a list of
* objects instead of a list of arrays. This function simplifies a common type

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