<?php
function msubstr($str, $start=0, $length, $charset="utf-8", $suffix=true)
{
if($suffix){
$suffixStr = "…";
}else {
$suffixStr = "";
}
if(function_exists("mb_substr"))
return mb_substr($str, $start, $length, $charset).$suffixStr;
elseif(function_exists('iconv_substr')) {
return iconv_substr($str,$start,$length,$charset).$suffixStr;
}
$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 $slice.$suffixStr;
}
$a = '测试这是一个测试';
//$a = 'xxxxbbbbbnnn';
$b = msubstr($a,0,5,'utf-8',false);
var_dump($b);
?>
preferences:
43.77 ms | 402 KiB | 5 Q