|
PHP复制代码
/**
+----------------------------------------------------------
* 字符串截取,支持中文和其他编码
+----------------------------------------------------------
* @param string $source 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 $suffix 截断显示字符后缀
+----------------------------------------------------------
* @return string
+----------------------------------------------------------
*/
function xs_substr ($source, $start=0, $length, $charset="utf-8", $suffix="")
{
if(function_exists("mb_substr")) //采用PHP自带的mb_substr截取字符串
{
$string = mb_substr($source, $start, $length, $charset).$suffix;
}
elseif(function_exists('iconv_substr')) //采用PHP自带的iconv_substr截取字符串
{
$string = iconv_substr($source,$start,$length,$charset).$suffix;
}
else
{
$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], $source, $match);
$slice = join("",array_slice($match[0], $start, $length));
$string = $slice.$suffix;
}
return $string;
}
复制代码
|
评分
-
查看全部评分
|