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- 127550
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- 2010-9-23
- 最后登录
- 1970-1-1
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摘自ThinkPHP类库中的功能,不过很好用,支持各种编码。- /**
- +----------------------------------------------------------
- * 字符串截取,支持中文和其他编码
- +----------------------------------------------------------
- * @static
- * @access public
- +----------------------------------------------------------
- * @param string $str 需要转换的字符串
- * @param string $start 开始位置
- * @param string $length 截取长度
- * @param string $charset 编码格式
- * @param string $suffix 截断显示字符
- +----------------------------------------------------------
- * @return string
- +----------------------------------------------------------
- */
- function msubstr($str, $start=0, $length, $charset="utf-8", $suffix=true) {
- if(function_exists("mb_substr"))
- $slice = mb_substr($str, $start, $length, $charset);
- elseif(function_exists('iconv_substr')) {
- $slice = iconv_substr($str,$start,$length,$charset);
- }else{
- $re['utf-8'] = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|[\xe0-\xef][\x80-\xbf]{2}|[\xf0-\xff][\x80-\xbf]{3}/";
- $re['gb2312'] = "/[\x01-\x7f]|[\xb0-\xf7][\xa0-\xfe]/";
- $re['gbk'] = "/[\x01-\x7f]|[\x81-\xfe][\x40-\xfe]/";
- $re['big5'] = "/[\x01-\x7f]|[\x81-\xfe]([\x40-\x7e]|\xa1-\xfe])/";
- preg_match_all($re[$charset], $str, $match);
- $slice = join("",array_slice($match[0], $start, $length));
- }
- return $suffix ? $slice.'...' : $slice;
- }
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