Deprecated do_hash() and read_file() in favor of hash() and file_get_contents() respectively
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