db_escape_string: remove tags by default (refs #323)

db.php

@@ -41,7 +41,9 @@ function db_connect($host, $user, $pass, $db) {
 	}
 }
 
-function db_escape_string($s) {
+function db_escape_string($s, $strip_tags = true) {
+	if ($strip_tags) $s = strip_tags($s);
+
 	if (DB_TYPE == "pgsql") {	
 		return pg_escape_string($s);
 	} else {

functions.php

@@ -954,7 +954,7 @@
 				$result = db_query($link, "SELECT id FROM	ttrss_entries 
 					WHERE guid = '$entry_guid'");
 
-				$entry_content = db_escape_string($entry_content);
+				$entry_content = db_escape_string($entry_content, true);
 
 				$content_hash = "SHA1:" . sha1(strip_tags($entry_content));