diff --git a/WordPress/Docs/Arrays/ArrayKeySpacingRestrictionsStandard.xml b/WordPress/Docs/Arrays/ArrayKeySpacingRestrictionsStandard.xml
new file mode 100644
index 0000000000..876628599e
--- /dev/null
+++ b/WordPress/Docs/Arrays/ArrayKeySpacingRestrictionsStandard.xml
@@ -0,0 +1,23 @@
+<documentation title="Array Key Spacing Restrictions">
+    <standard>
+    <![CDATA[
+      When referring to array items, only include a space around the index if it is a variable.
+    ]]>
+    </standard>
+    <code_comparison>
+        <code title="Valid: Correct whitespace for index keys">
+        <![CDATA[
+$post       = $posts[ $post_id ];
+$post       = $posts[123];
+$post_title = $post['post_title'];
+        ]]>
+        </code>
+        <code title="Invalid: Incorrect spacing">
+        <![CDATA[
+$post       = $posts[$post_id];
+$post       = $posts[ 123 ];
+$post_title = $post[ 'post_title' ];
+        ]]>
+        </code>
+    </code_comparison>
+</documentation>