Update Array.php

src/Function/Array.php

@@ -5,4 +5,37 @@
  * Copyright (c) 2018 Nicholas English <https://github.com/Nenglish7>.
  */
 
-namespace Nenglish\Function\Array;
+namespace Nenglish7\Function\Array;
+
+/**
+ * array_depth().
+ *
+ * Get current depth of an array.
+ *
+ * @param array $array The array to test
+ *
+ * @throws InvalidArgumetException If `$array` is not an array.
+ *
+ * @return int Return the current depth of the array passed.
+ */
+function array_depth($array)
+{
+    if (!\is_array($array)) {
+        throw new Exception\InvalidArgumetException(\sprintf(
+            '`$array` has to be an array data type. passed: `%s`.',
+            \htmlspecialchars(\var_export(\serialize($array), \true), \ENT_QUOTES, 'UTF-8')
+        ));
+    }
+    $depth = 1;
+    if (empty($array)) {
+        goto finish;
+    }
+    foreach ($array as $value) {
+        if (\is_array($value)) {
+            $depth += array_depth($value);
+            break;
+        }
+    }
+    finish:
+    return $depth;
+}