今天在这里分享最近在英文网站中优化的一个小改进,Phpcms V9截取字符函数改进,截取英文更精确,具体方法来自PC官方论坛,分享在此.
 
官方默认的str_cut（）截取的字符统计长度不精准,特别是在中英文字符混搭的时候，调用列表会出现问题,采用【拽拽焱】分享的方法,可以将长度偏差在2个字符内,很不错,先赞一个.
 
具体代码:
 
/**
 * 字符截取 支持UTF8/GBK
 * @param $string
 * @param $length
 * @param $dot
 */
        } else {                 
                while($n < $strlen) {
                        if(ord($string[$n]) > 127) {
                                $tn = 2; $n += 2; $noc += 1;
                        } else{
                                $tn = 1; ++$n; $noc += 0.5;
                        }
                        if($noc >= $length) {
                                if($n < $strlen) ++$noc;
                                break;
                        }
                }
        }
        if($noc > $length && !emptyempty($dot)) {
                $n -= $tn;
                $strcut = substr($string, 0, $n);
                $strcut .= $dot;
        }else{
                $strcut = substr($string, 0, $n);
        }  //Cuoxin.com
        $strcut = str_replace(array('&', '"', "'", '“', '”', '—', '<', '>', '·', '…'), array('&', '"', ''', '“', '”', '—', '<', '>', '·', '…'), $strcut);
        return $strcut;
}