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<?php /** * @package utf8 */ /** * Define UTF8_CORE as required */ if ( !defined('UTF8_CORE') ) { define('UTF8_CORE',TRUE); } //-------------------------------------------------------------------- /** * Wrapper round mb_strlen * Assumes you have mb_internal_encoding to UTF-8 already * Note: this function does not count bad bytes in the string - these * are simply ignored * @param string UTF-8 string * @return int number of UTF-8 characters in string * @package utf8 */ function utf8_strlen($str){ return mb_strlen($str); } //-------------------------------------------------------------------- /** * Assumes mbstring internal encoding is set to UTF-8 * Wrapper around mb_strpos * Find position of first occurrence of a string * @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 * @package utf8 */ function utf8_strpos($str, $search, $offset = FALSE){ if ( $offset === FALSE ) { return mb_strpos($str, $search); } else { return mb_strpos($str, $search, $offset); } } //-------------------------------------------------------------------- /** * Assumes mbstring internal encoding is set to UTF-8 * Wrapper around mb_strrpos * Find position of last occurrence of a char in a string * @param string haystack * @param string needle (you should validate this with utf8_is_valid) * @param integer (optional) offset (from left) * @return mixed integer position or FALSE on failure * @package utf8 */ function utf8_strrpos($str, $search, $offset = FALSE){ if ( $offset === FALSE ) { # Emulate behaviour of strrpos rather than raising warning if ( empty($str) ) { return FALSE; } return mb_strrpos($str, $search); } else { if ( !is_int($offset) ) { trigger_error('utf8_strrpos expects parameter 3 to be long',E_USER_WARNING); return FALSE; } $str = mb_substr($str, $offset); if ( FALSE !== ( $pos = mb_strrpos($str, $search) ) ) { return $pos + $offset; } return FALSE; } } //-------------------------------------------------------------------- /** * Assumes mbstring internal encoding is set to UTF-8 * Wrapper around mb_substr * Return part of a string given character offset (and optionally length) * @param string * @param integer number of UTF-8 characters offset (from left) * @param integer (optional) length in UTF-8 characters from offset * @return mixed string or FALSE if failure * @package utf8 */ function utf8_substr($str, $offset, $length = FALSE){ if ( $length === FALSE ) { return mb_substr($str, $offset); } else { return mb_substr($str, $offset, $length); } } //-------------------------------------------------------------------- /** * Assumes mbstring internal encoding is set to UTF-8 * Wrapper around mb_strtolower * Make a string lowercase * Note: The concept of a characters "case" only exists is some alphabets * such as Latin, Greek, Cyrillic, Armenian and archaic Georgian - it does * not exist in the Chinese alphabet, for example. See Unicode Standard * Annex #21: Case Mappings * @param string * @return mixed either string in lowercase or FALSE is UTF-8 invalid * @package utf8 */ function utf8_strtolower($str){ return mb_strtolower($str); } //-------------------------------------------------------------------- /** * Assumes mbstring internal encoding is set to UTF-8 * Wrapper around mb_strtoupper * Make a string uppercase * Note: The concept of a characters "case" only exists is some alphabets * such as Latin, Greek, Cyrillic, Armenian and archaic Georgian - it does * not exist in the Chinese alphabet, for example. See Unicode Standard * Annex #21: Case Mappings * @param string * @return mixed either string in lowercase or FALSE is UTF-8 invalid * @package utf8 */ function utf8_strtoupper($str){ return mb_strtoupper($str); }