- <?php
- /**
- * @brief strlen_mb 计算字符串长度,支持中文,自动检测编码,UTF-8与GBK测试通过
- *
- * @param $str
- *
- * @return
- */
- function strlen_mb($str){
- $mb_len = mb_detect_encoding($str) == 'UTF-8' ? 2 : 1;
- $patt = '/([\\x00-\\x7f]|[\\x80-\\xff].{' . $mb_len . '})/';
- $match = preg_match_all($patt, $str, $groups);
- if($groups){
- return count($groups[0]);
- }else{
- return false;
- }
- }
- /**
- * @brief substr_mb 截取字符串,中文防乱码,自动检测编码,UTF-8与GBK测试通过
- *
- * @param $str
- * @param $start
- * @param $len
- *
- * @return
- */
- function substr_mb($str, $start, $len){
- $mb_len = mb_detect_encoding($str) == 'UTF-8' ? 2 : 1;
- $patt = '/([\\x00-\\x7f]|[\\x80-\\xff].{' . $mb_len . '}){' . $len . '}/';
- preg_match($patt, $str, $groups);
- if($groups){
- return $groups[0];
- }else{
- return false;
- }
- }
- echo '<meta charset=utf-8>';
- $str = '北京dd欢迎你';
- for($i = 0; $i <= strlen_mb($str); $i++){
- var_dump(substr_mb($str, 0, $i));
- }
- //该片段来自于http://www.codesnippet.cn/detail/0912201411189.html
来源: http://www.codesnippet.cn/detail/0912201411189.html