new html object tags enabled

shared/code/tce_functions_tcecode.php

@@ -62,6 +62,9 @@ function F_decode_tcecode($text_to_decode) {
 	// [mathml]MathML_code[/mathml]
 	$newtext = preg_replace_callback("#\[mathml\](.*?)\[/mathml\]#si", 'F_mathml_callback', $newtext);
 
+	// [html]html_code[/html]
+	$newtext = preg_replace_callback("#\[html\](.*?)\[/html\]#si", 'F_html_callback', $newtext);
+		
 	// [object]object_url[/object:width:height:alt]
 	$newtext = preg_replace_callback("#\[object\](.*?)\.(.*?)\[/object\:(.*?)\:(.*?)\:(.*?)\]#si", 'F_objects_callback', $newtext);
 	// [object]object_url[/object:width:height]
@@ -302,6 +305,26 @@ function F_mathml_callback($matches) {
 	return $mathml;
 }
 
+/**
+ * Callback function for preg_replace_callback (html replacement).
+ * Returns replacement code for html code.
+ * @param $matches (string) array containing matches: $matches[0] is the complete match, $matches[1] the match for the first subpattern enclosed in '(...)' (the html code)
+ * @return string html code.
+ */
+function F_html_callback($matches) {
+	//list of valid tags
+	$html_tags = '<em><h1><h2><h3><h4><h5><img><p><strong><table><thead><tbody><td><th><tr>';
+	$html_tags .= "<audio><video>";
+	$html = unhtmlentities($matches[1]);
+	$html = str_replace("&gt;", '>', $html);
+	$html = str_replace("&lt;", '<', $html);
+	// remove all non-html tags
+	$html = strip_tags($html, $html_tags);
+	$html = preg_replace("/[\n\r\s]+/", ' ', $html);
+	$html = trim($html);
+	return $html;
+}
+
 /**
  * Callback function for preg_replace_callback.
  * Returns replacement code by MIME type.