diff --git a/user_guide_src/source/helpers/file_helper.rst b/user_guide_src/source/helpers/file_helper.rst
index bfc271e..60c5aa9 100644
--- a/user_guide_src/source/helpers/file_helper.rst
+++ b/user_guide_src/source/helpers/file_helper.rst
@@ -32,6 +32,9 @@
 	controller or view files. CodeIgniter uses a front controller so paths
 	are always relative to the main site index.
 
+.. note:: This function is DEPRECATED. Use the native ``file_get_contents()``
+	instead.
+
 If your server is running an `open_basedir` restriction this function might not work if you are trying to access a file above the calling script.
 
 write_file('path', $data)
diff --git a/user_guide_src/source/helpers/security_helper.rst b/user_guide_src/source/helpers/security_helper.rst
index b1bcf2b..ec0be28 100644
--- a/user_guide_src/source/helpers/security_helper.rst
+++ b/user_guide_src/source/helpers/security_helper.rst
@@ -43,8 +43,10 @@
 	$str = do_hash($str); // SHA1
 	$str = do_hash($str, 'md5'); // MD5
 
-.. note:: This function was formerly named dohash(), which has been
-	removed in favor of `do_hash()`.
+.. note:: This function was formerly named ``dohash()``, which has been
+	removed in favor of ``do_hash()``.
+
+.. note:: This function is DEPRECATED. Use the native ``hash()`` instead.
 
 strip_image_tags()
 ==================
diff --git a/user_guide_src/source/helpers/string_helper.rst b/user_guide_src/source/helpers/string_helper.rst
index 2d23fb0..19500aa 100644
--- a/user_guide_src/source/helpers/string_helper.rst
+++ b/user_guide_src/source/helpers/string_helper.rst
@@ -36,8 +36,7 @@
 -  **unique**: Encrypted with MD5 and uniqid(). Note: The length
    parameter is not available for this type. Returns a fixed length 32
    character string.
--  **sha1**: An encrypted random number based on do_hash() from the
-   :doc:`security helper <security_helper>`.
+-  **sha1**: An encrypted random number based on ``sha1()``.
 
 Usage example