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-rw-r--r--engine/lib/elgglib.php31
1 files changed, 31 insertions, 0 deletions
diff --git a/engine/lib/elgglib.php b/engine/lib/elgglib.php
index 385660d01..f41c87a7d 100644
--- a/engine/lib/elgglib.php
+++ b/engine/lib/elgglib.php
@@ -2411,6 +2411,37 @@ function elgg_get_array_value($key, array $array, $default = NULL) {
}
/**
+ * Sorts a 3d array by specific element.
+ * Will re-index numeric indexes.
+ * NB: This operates the same as the built-in sort functions.
+ * ie, sorts the array and returns a bool for success.
+ *
+ * Do this: elgg_sort_3d_array_by_value($my_array);
+ * Not this: $my_array = elgg_sort_3d_array_by_value($my_array);
+ *
+ * @param array $array Array to sort
+ * @param string $element Element to sort by
+ * @param $sort_order
+ * @param $sort_type
+ * @return bool
+ */
+function elgg_sort_3d_array_by_value(&$array, $element, $sort_order = SORT_ASC, $sort_type = SORT_LOCALE_STRING) {
+ $sort = array();
+
+ foreach ($array as $k => $v) {
+ if (isset($v[$element])) {
+ $sort[] = strtolower($v[$element]);
+ } else {
+ $sort[] = NULL;
+ }
+ }
+
+ var_dump($sort, $array);
+
+ return array_multisort($sort, $sort_order, $sort_type, $array);
+}
+
+/**
* Some useful constant definitions
*/
define('ACCESS_DEFAULT', -1);