1 /** 2 * 字符串截取，支持中文和其他编码 3 * @param [string] $str [字符串] 4 * @param integer $start [起始位置] 5 * @param integer $length [截取长度] 6 * @param string $charset [字符串编码] 7 * @param boolean $suffix [是否有省略号] 8 * @return [type] [description] 9 */ 10 function msubstr($str, $start=0, $length=15, $charset="utf-8", $suffix=true) { 11 if(function_exists("mb_substr")) { 12 return mb_substr($str, $start, $length, $charset); 13 } elseif(function_exists('iconv_substr')) { 14 return iconv_substr($str,$start,$length,$charset); 15 } 16 $re['utf-8'] = "/[x01-x7f]|[xc2-xdf][x80-xbf]|[xe0-xef][x80-xbf]{2}|[xf0-xff][x80-xbf]{3}/"; 17 $re['gb2312'] = "/[x01-x7f]|[xb0-xf7][xa0-xfe]/"; 18 $re['gbk'] = "/[x01-x7f]|[x81-xfe][x40-xfe]/"; 19 $re['big5'] = "/[x01-x7f]|[x81-xfe]([x40-x7e]|xa1-xfe])/"; 20 preg_match_all($re[$charset], $str, $match); 21 $slice = join("",array_slice($match[0], $start, $length)); 22 if($suffix) { 23 return $slice."…"; 24 } 25 return $slice; 26 } 27 /** 28 * @计算中文字符串长度，只支持UTF8编码 29 */ 30 function utf8_strlen($string = null) { 31 preg_match_all(“/./us”, $string, $match); 32 return count($match[0]); 33 }