PHP、MySQL、ExtJS、Linux、CentOS、Ubuntu

提供者：阿勇學長

function cut_str($string, $sublen, $start = 0, $code = 'UTF-8')
{
if($code == 'UTF-8')
{
$pa = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]|[\xe1-\xef][\x80-\xbf][\x80-\xbf]|\xf0[\x90-\xbf][\x80-\xbf][\x80-\xbf]|[\xf1-\xf7][\x80-\xbf][\x80-\xbf][\x80-\xbf]/";
preg_match_all($pa, $string, $t_string);

if(count($t_string[0]) - $start > $sublen)
return join('', array_slice($t_string[0], $start, $sublen))."..";
return join('', array_slice($t_string[0], $start, $sublen));
}
else
{
$start = $start*2;
$sublen = $sublen*2;
$strlen = strlen($string);
$tmpstr = '';
for($i=0; $i<$strlen; $i++){
if($i>=$start && $i<($start+$sublen))
{
if(ord(substr($string, $i, 1))>129)
$tmpstr.= substr($string, $i, 2);
else
$tmpstr.= substr($string, $i, 1);
}
if(ord(substr($string, $i, 1))>129)
$i++;
}
if(strlen($tmpstr)<$strlen )
$tmpstr.= "..";
return $tmpstr;
}
}