Added data classes bases, Trivial modifications to many files

Update .gitignore, .htaccess, and 19 more files...

commons/content/article.php

@@ -0,0 +1,3 @@
+<?php
+
+?>

commons/content/content.php

@@ -0,0 +1,3 @@
+<?php
+
+?>

commons/content/data/metadata.php

@@ -0,0 +1,19 @@
+<?php
+// Making sure the file is included and not accessed directly.
+if(basename(__FILE__) == basename($_SERVER["SCRIPT_FILENAME"])) {
+	header('HTTP/1.1 403 Forbidden');
+	die();
+}
+
+// Including required helpers.
+include_once 'commons/langs.php';
+
+// Including subclasses.
+include_once 'commons/content/data/opengraph.php';
+include_once 'commons/content/data/twitter_card.php';
+
+class ContentMetadata {
+
+}
+
+?>

commons/content/data/opengraph.php

@@ -49,4 +49,4 @@ class OpenGraphData {
 		);
 	}
 }
-?>
+?>

commons/content/data/twitter_card.php

@@ -0,0 +1,20 @@
+<?php
+
+/*enum Suit {
+case Hearts;
+case Diamonds;
+case Clubs;
+case Spades;
+}*/
+
+// See: https://developer.twitter.com/en/docs/twitter-for-websites/cards/overview/markup
+/*class ContentTwitterMetadata {
+public string $title;
+public string $description;
+public string $type;
+public string $url;
+public string $image;
+public string $image_type;
+}*/
+
+?>