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function cut_str($string, $start,$sublen, $code = 'UTF-8')
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{
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if($code == 'UTF-8')
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{
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$pa = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]|[\xe1-\xef][\x80-\xbf][\x80-\xbf]|\xf0[\x90-\xbf][\x80-\xbf][\x80-\xbf]|[\xf1-\xf7][\x80-\xbf][\x80-\xbf][\x80-\xbf]/";
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preg_match_all($pa, $string, $t_string);
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if(count($t_string[0]) - $start > $sublen) return join('', array_slice($t_string[0], $start, $sublen))."...";
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return join('', array_slice($t_string[0], $start, $sublen));
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}
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else
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{
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$start = $start*2;
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$sublen = $sublen*2;
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$strlen = strlen($string);
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$tmpstr = '';
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//www.zhaoxi.org 朝夕网
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for($i=0; $i< $strlen; $i++)
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{
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if($i>=$start && $i< ($start+$sublen))
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{
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if(ord(substr($string, $i, 1))>129)
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{
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$tmpstr.= substr($string, $i, 2);
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}
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else
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{
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$tmpstr.= substr($string, $i, 1);
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}
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}
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if(ord(substr($string, $i, 1))>129) $i++;
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}
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if(strlen($tmpstr)< $strlen ) $tmpstr.= "...";
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return $tmpstr;
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}
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}