Unicode aware replacement for strlen(). Returns the number

of characters in the string (not the number of bytes), replacing multibyte characters with a single byte equivalent utf8_decode() converts characters that are not in ISO-8859-1 to '?', which, for the purpose of counting, is alright - It's much faster than iconv_strlen Note: this function does not count bad UTF-8 bytes in the string

• these are simply ignored

• return: number of UTF-8 characters in string
• link: http://www.php.net/manual/en/function.utf8-decode.php
• link: http://www.php.net/manual/en/function.strlen.php
• author: <at hotmail dot com chernyshevsky at hotmail dot com>

• string $str: UTF-8 string

UTF-8 aware alternative to strrpos

Find position of last occurrence of a char in a string Note: This will get alot slower if offset is used Note: requires utf8_substr and utf8_strlen to be loaded

• return: integer position or FALSE on failure
• see: utf8_strlen()
• see: utf8_substr()
• see: http://www.php.net/strrpos

• string $str: haystack
• string $needle: needle (you should validate this with utf8_is_valid)
• integer $offset: (optional) offset (from left)

UTF-8 aware alternative to strtoupper

Make a string uppercase Note: The concept of a characters "case" only exists is some alphabets such as Latin, Greek, Cyrillic, Armenian and archaic Georgian - it does not exist in the Chinese alphabet, for example. See Unicode Standard Annex #21: Case Mappings Note: requires utf8_to_unicode and utf8_from_unicode

• return: either string in lowercase or FALSE is UTF-8 invalid
• see: http://www.unicode.org/reports/tr21/tr21-5.html
• see: http://dev.splitbrain.org/view/darcs/dokuwiki/inc/utf8.php
• see: utf8_from_unicode()
• see: utf8_to_unicode()
• see: http://www.php.net/strtoupper
• author: Andreas Gohr <andi@splitbrain.org>

• string $string