截图多余字符，中英文，避免截取中文乱码

截图多余字符，中英文都可以，避免截取中文结尾 ？？ 乱码！！ function utf8_strlen($string = null) {// 将字符串分解为单元preg_match_all('/./us', $string, $match);// 返回单元个数return count($match[0]);} function sub_content($content, $length){$len = utf8_strlen($content);for($i = 0 ; $i $arr[$i] = mb_substr($content,$i,1,'utf-8');}$get_length = 0;$result = '';foreach($arr as $code){$result .= $code;if(strlen($code) > 1){$get_length += 2;}else{$get_length += 1;}if($get_length >= $length){break;}}return $result;} echo sub_content($rows["Description"],18); /** * 字符串截取，支持中文和其他编码 * @param string $str * @param int $start * @param int $length * @param string $charset * @param boolean $suffix * @return string */function w_substr($str, $start = 0, $length, $charset = "utf-8", $suffix = TRUE) {$suffix_str = $suffix ? '…' : '';if(function_exists('mb_substr')) {return mb_substr($str, $start, $length, $charset) . $suffix_str;} elseif(function_exists('iconv_substr')) {return iconv_substr($str, $start, $length, $charset) . $suffix_str;} else {$pattern = array();$pattern['utf-8'] = '/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|[\xe0-\xef][\x80-\xbf]{2}|[\xf0-\xff][\x80-\xbf]{3}/';$pattern['gb2312'] = '/[\x01-\x7f]|[\xb0-\xf7][\xa0-\xfe]/';$pattern['gbk'] = '/[\x01-\x7f]|[\x81-\xfe][\x40-\xfe]/';$pattern['big5'] = '/[\x01-\x7f]|[\x81-\xfe]([\x40-\x7e]|\xa1-\xfe])/';preg_match_all($pattern[$charset], $str, $matches);$slice = implode("", array_slice($matches[0], $start, $length));return $slice . $suffix_str;}}复制代码