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| utf8_strlen($str) X-Ref |
| Unicode aware replacement for strlen(). Returns the number of characters in the string (not the number of bytes), replacing multibyte characters with a single byte equivalent utf8_decode() converts characters that are not in ISO-8859-1 to '?', which, for the purpose of counting, is alright - It's much faster than iconv_strlen Note: this function does not count bad UTF-8 bytes in the string - these are simply ignored author: <chernyshevsky at hotmail dot com> param: string UTF-8 string return: int number of UTF-8 characters in string |
| utf8_strpos($str, $needle, $offset = NULL) X-Ref |
| UTF-8 aware alternative to strpos Find position of first occurrence of a string Note: This will get alot slower if offset is used Note: requires utf8_strlen amd utf8_substr to be loaded param: string haystack param: string needle (you should validate this with utf8_is_valid) param: integer offset in characters (from left) return: mixed integer position or FALSE on failure |
| utf8_strrpos($str, $needle, $offset = NULL) X-Ref |
| UTF-8 aware alternative to strrpos Find position of last occurrence of a char in a string Note: This will get alot slower if offset is used Note: requires utf8_substr and utf8_strlen to be loaded param: string haystack param: string needle (you should validate this with utf8_is_valid) param: integer (optional) offset (from left) return: mixed integer position or FALSE on failure |
| utf8_substr($str, $offset, $length = NULL) X-Ref |
| UTF-8 aware alternative to substr Return part of a string given character offset (and optionally length) Note arguments: comparied to substr - if offset or length are not integers, this version will not complain but rather massages them into an integer. Note on returned values: substr documentation states false can be returned in some cases (e.g. offset > string length) mb_substr never returns false, it will return an empty string instead. This adopts the mb_substr approach Note on implementation: PCRE only supports repetitions of less than 65536, in order to accept up to MAXINT values for offset and length, we'll repeat a group of 65535 characters when needed. Note on implementation: calculating the number of characters in the string is a relatively expensive operation, so we only carry it out when necessary. It isn't necessary for +ve offsets and no specified length author: Chris Smith<[email protected]> param: string param: integer number of UTF-8 characters offset (from left) param: integer (optional) length in UTF-8 characters from offset return: mixed string or FALSE if failure |
| utf8_strtolower($string) X-Ref |
| UTF-8 aware alternative to strtolower Make a string lowercase 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 author: Andreas Gohr <[email protected]> param: string return: mixed either string in lowercase or FALSE is UTF-8 invalid |
| utf8_strtoupper($string) X-Ref |
| 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 author: Andreas Gohr <[email protected]> param: string return: mixed either string in lowercase or FALSE is UTF-8 invalid |
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