<?php
// 实现中文字串截取无乱码的函数(适用于utf-8)
function substr_text($str, $start=0, $length, $charset="utf-8", $suffix="")
{
if(function_exists("mb_substr"))
{
// 判断中文长度,超过指定长度超出部分显示...
if (mb_strlen($str,$charset)>$length)
{
return mb_substr($str, $start, $length, $charset).$suffix.'...';
}
else
{
return mb_substr($str, $start, $length, $charset).$suffix;
}
}
elseif(function_exists('iconv_substr'))
{
// 判断中文长度,超过指定长度超出部分显示...
if (mb_strlen($str,$charset)>$length)
{
return iconv_substr($str,$start,$length,$charset).$suffix.'...';
}
else
{
return iconv_substr($str,$start,$length,$charset).$suffix;
}
}
$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 $slice.$suffix;
}
echo substr_text('菜单测试',0,2);
?>
