Первая версия разметки маркдаун, удаление тегов из сохраняемого текста статьи

ground/classes/Markdown.php

@@ -0,0 +1,70 @@
+<?php
+
+class Markdown
+{
+
+	static function processing($string)
+	{
+		$string = self::replaceHeaders($string);
+		$string = self::replaceBoldItalic($string);
+		$string = self::replaceBold($string);
+		$string = self::replaceItalic($string);
+		$string = self::replaceUnderline($string);
+		$string = self::replaceUrls($string);
+		return $string;
+	}
+
+	static private function replaceHeaders($string)
+	{
+		for ($index = 3; $index > 0; $index--) {
+
+			$pr = '/(^#{' . $index . '} .{1,})/m';
+
+			preg_match_all($pr, $string, $headers);
+
+			if (isset($headers[0][0])) {
+				foreach ($headers[0] as $header) {
+					$hI = $index+1;
+					$string = str_replace($header, "<h$hI>" . mb_substr($header, $index + 1, NULL, 'UTF-8') . "</h$hI>", $string);
+				}
+			}
+		}
+
+		return $string;
+	}
+
+	static private function replaceBoldItalic($string)
+	{
+		$pr = '(\*{3}(.+?)\*{3})';
+		$rep = '<b><i>$1</i></b>';
+		return preg_replace($pr, $rep, $string);
+	}
+
+		static private function replaceBold($string)
+	{
+		$pr = '(\*{2}(.+?)\*{2})';
+		$rep = '<b>$1</b>';
+		return preg_replace($pr, $rep, $string);
+	}
+
+	static private function replaceItalic($string)
+	{
+		$pr = '(\*{1}(.+?)\*{1})';
+		$rep = '<i>$1</i>';
+		return preg_replace($pr, $rep, $string);
+	}
+
+	static private function replaceUnderline($string)
+	{
+		$pr = '(\_{1}(.+?)\_{1})';
+		$rep = '<u>$1</u>';
+		return preg_replace($pr, $rep, $string);
+	}
+
+	static private function replaceUrls($string)
+	{
+		$pr = '((https{0,1}:\/\/[\da-z\.-]+\.[a-z]{2,6})[\/\w\?=&#%+\.,-]*\/?)';
+		$rep = '<a href="$0" target="_blank">$1</a>';
+		return preg_replace($pr, $rep, $string);
+	}
+}

ground/controllers/ArticlesController.php

@@ -76,6 +76,7 @@ class ArticlesController extends Controller
 		$id = (int) $_POST['id'];
 		$title = $_POST['title'];
 		$text = $_POST['text'];
+		$text = strip_tags($text);
 		$allowComments = (int) isset($_POST['allowComments']);
 
 		$article = $id ? Article::model()->getByPK($id) : new Article();

ground/controllers/PageController.php

@@ -195,6 +195,7 @@ class PageController extends Controller
 			App::setConfig('title', $article->title . ' - wikipoints.ru');
 			$article->text = Helper::replaceLinks($article->text, 'html');
 			$article->text = Helper::replaceImgs($article->text, 'html');
+			$article->text = Markdown::processing($article->text);
 			$article->text = nl2br($article->text);
 
 			self::render('article.php', array(