backdrop_strlen in core/includes/
Counts the number of characters in a UTF-8 string.
backdrop_strtolower in core/includes/
Lowercase a UTF-8 string.
backdrop_strtoupper in core/includes/
Uppercase a UTF-8 string.
backdrop_substr in core/includes/
Cuts off a piece of a string based on character indices and counts.
UnicodeUnitTest::testMbStringUnicode in core/modules/simpletest/tests/unicode.test
Test full unicode features implemented using the mbstring extension.
unicode_requirements in core/includes/
Returns Unicode library status and errors.
views_handler::case_transform in core/modules/views/includes/
Transform a string by a certain method.
_unicode_check in core/includes/
Perform checks about Unicode support in PHP, and set the right settings if needed.